Stable Kernel

Design and implement loyalty engine and RESTful API services using Java and Spring framework, collaborating with teams to ensure system reliability. | 6-10 years back-end development with Java Spring, cloud platform experience, strong consultative skills, and event-driven architecture knowledge. | About the Company: Stable Kernel is a technology services firm and custom software developer building scalable software solutions for cutting-edge, innovative enterprises to move their business forward. We are headquartered in Atlanta, GA. We’re a privately held, Great Place to Work Certified Company™ with a multi-award-winning culture and an impressive 10-plus-year trajectory of sustainable growth. At Stable Kernel, we support our employees in ways that help them do some of the best work of their lives. About the Role: As a Stable Kernel Contract Senior Software Engineer, you play an essential role in setting our portfolio of world-class clients up for success through the development and delivery of their most innovative, transformational initiatives. You will collaborate daily with other engineers and product team members, make decisions that influence the path of a product roadmap, leverage software development best practices, and become a more well-rounded engineer as you learn new technologies. Your knowledgeable practice, reliability, and consultative nature make you an engineer that stakeholders and teammates trust. Core Responsibilities Include: Technical Impact: Design and implement loyalty engine services in Java using the Spring framework, including transaction processing, tier calculation, reward accrual, and benefit eligibility. Design and implement RESTful API services in Java using the Spring framework, following contract-first development practices, with a focus on aggregation patterns, caching strategies, circuit breaking, and graceful degradation for latency-sensitive flows. Modern Java (17+) and familiarity with current Spring Boot conventions, including reactive patterns where appropriate. Cloud platform experience (AWS, GCP, or Azure), including service deployment, networking fundamentals, and managed services such as queues, caches, and databases. Identity and access management protocols such as OAuth 2.0, OIDC, and SAML, including integration with enterprise identity providers and directory services. Establishing and evolving service architecture, including domain modeling, rules evaluation patterns, event-driven state management, auditability, API versioning, and backward-compatibility standards that support independent mobile release cadences. Defining integration contracts with upstream enterprise platforms (POS, CRM, commerce, identity providers) and downstream consumers (BFF, analytics, finance), including data normalization, error mapping, and retry logic. Building and maintaining integrations that pull transaction data from multiple channels and apply consistent earning logic regardless of source. Authentication and session management patterns, including token refresh, device trust, and silent re-authentication for long-lived mobile sessions. Implementing cross-cutting concerns such as idempotency, correlation IDs, observability, and audit event emission. Implementing robust state management for account-level aggregations, provisional and finalized reward states, and period-based accrual tracking. Designing test strategies for complex business rules, including edge cases around split-tier earning, return adjustments, forward offsets, delegate activity aggregation, and high system reliability. Implementing security and audit concerns: role-based access, 2FA for redemption flows, full audit trails for all state changes. Designing and involving yourself in CI/CD and automated testing for high system reliability. Providing expert feedback that improves the overall delivery of work and ensuring a high standard of quality across the project. Using AI-assisted development tools such as Claude Code or Cursor to accelerate delivery while maintaining code quality and architectural standards. Business Alignment: Clarifying strategic outcomes and influencing roadmaps and projects. Identifying, suggesting, and driving improvements in your customers' end-to-end experience. Aiding in estimating work for new business with more unknowns and coaching others in estimation best practices. Interacting with Others: Coordinating across the entire company. Influencing the entire organization to make changes to support your work. Advising teams across the company. Autonomy & Ambiguity: Designing a long-term roadmap with no direction. Translating customer and business needs and strategic direction into projects and consistently simplifying high-complexity situations. Coaching and mentoring others in tackling ambiguity. Problem-Solving: Decomposing strategic direction into projects: Planning, communicating, and executing to solve our most challenging problems. Ensuring alignment with long-term objectives, fostering a culture of informed decision-making and innovation. Anticipating most risks and driving simplification to mitigate risks ahead of time. Escalating issues while solving them in parallel ensuring others are informed. Leadership: Proposing new organization-level processes to improve key areas such as team throughput, employee happiness, or product engagement. Driving best practices across the organization. Exhibiting exceptional mentoring abilities and fostering a culture of continuous learning and improvement by identifying and nurturing potential in others providing strategic guidance helping develop career paths for team members Leading projects. Setting the strategic direction for projects or areas of technology, leading multiple project teams, and influencing decision-making at higher organizational levels. Exhibiting strong capabilities in stakeholder management, negotiating, and problem-solving in complex scenarios. Mentoring and developing other leaders within the team, fostering a culture of innovation, and contributing significantly to organizational goals. Expertise With: Java for server-side development. The Spring framework ecosystem (Spring Boot, Spring MVC, Spring Security, Spring Data). Domain-driven design principles, including bounded contexts, aggregates, and domain events. RESTful API design principles, including contract-first approaches and OpenAPI/Swagger. Event-driven and message-oriented patterns (e.g., Kafka, RabbitMQ, or SQS) for reliable state transitions and integration. Integration patterns: API gateway, circuit breaker, retry/backoff, caching (Redis or similar), ETL or event-based data flows, and idempotency. Relational databases (e.g., PostgreSQL, MySQL) with strong skills in schema design, query optimization, and transactional integrity; familiarity with NoSQL datastores a plus. Rules engine patterns or configurable business logic frameworks. CI/CD tooling such as Jenkins, GitHub Actions, or similar, including pipeline authoring and deployment automation. Containerization and orchestration tools such as Docker and Kubernetes. SCM tools such as Git. Observability tooling such as Datadog, Splunk, New Relic, or OpenTelemetry. Automated testing at multiple layers: unit (JUnit, Mockito), integration, contract testing, and scenario-based validation of business rules. General Requirements: 6-10 years of development experience with an emphasis on back-end development. Extensive experience serving as a trusted consultant to stakeholders and cross-functional teams, providing expert guidance on backend service design, delivery, and integration. Degree in Computer Science or relevant field or experience. Nice to Haves: Experience building loyalty, rewards, or financial calculation engines. Experience building BFF or API aggregation layers for mobile applications. Familiarity with Salesforce CRM, Commerce Cloud, or Identity integration patterns. Experience with POS system integration and transaction-level data processing. Background in fintech, payments, or systems where auditability and financial accuracy are critical. Experience modeling complex account hierarchies (parent-child organizations, delegate/role structures). Experience with feature flagging and progressive rollout. Experience working alongside mobile teams to negotiate and iterate on API contracts. A Bit More Info: Minimum Base Compensation: $85 per hour This is a contract position. Stable Kernel operates a People Before Place Hybrid model, allowing most employees to choose where they can do their best work most days. Minimal travel is associated with this role. *Note – We are not sponsoring employment visas at this time. If you are currently in possession of an employment visa, it will need to be effective for at least 3 years from the date of your application for your candidacy for employment to be considered. Stable Kernel’s culture is inclusive and expansive. We celebrate diversity in its many glorious forms and do not discriminate based on race, religion, color, national origin, gender role orientation, sexual orientation, age, marital status, veteran status, or disability status. However, we will discriminate against those unwilling to comply with the practice of our company values: we work with integrity always we respect our work and each other we are dedicated to life-long learning and sharing we stay hungry for new challenges If you are like-minded in this regard, we hope you will apply. We look forward to meeting you.

Design and implement scalable backend solutions, provide technical leadership, and mentor team members. | 10+ years backend experience with Go and Azure, strong system architecture and stakeholder management skills, bachelor's degree. | About the Company: Stable Kernel is a technology services firm and custom software developer building scalable software solutions for cutting-edge, innovative enterprises to move their business forward. We are headquartered in Atlanta, GA. We’re a privately held, Great Place to Work Certified Company™ with a multi-award-winning culture and an impressive 10-plus-year trajectory of sustainable growth. At Stable Kernel, we support our employees in ways that help them do some of the best work of their lives. About the Role: As a Stable Kernel Principal Software Engineer, you play an essential role in setting our portfolio of world-class clients up for success through the development and delivery of their most innovative, transformational initiatives. You will collaborate daily with other engineers and product team members, make decisions that influence the path of a product roadmap, leverage software development best practices, and become a more well-rounded engineer as you learn new technologies. Your knowledgeable practice, reliability, and consultative nature make you an engineer that stakeholders and teammates trust. Principal Software Engineers may be classified as individual contributors or people managers with individual contributor responsibilities. Core Responsibilities Include: Technical Impact: Designing and implementing exemplary solutions regarding scalability and cost-effectiveness by making trade-offs between opportunity and complexity. Setting standards for codebase health and promoting best practices throughout the organization. Business Alignment: Clarifying strategic outcomes and influencing roadmaps and projects. Identifying, suggesting, and driving improvements in your customers' end-to-end experience. Aiding in estimating work for new business with more unknowns and coaching others in estimation best practices. Interacting with Others: Coordinating across the entire company. Influencing the entire organization to make changes to support your work. Advising teams across the company. Autonomy & Ambiguity: Designing a long-term roadmap with no direction. Translating customer and business needs and strategic direction into projects and consistently simplifying high-complexity situations. Coaching and mentoring others in tackling ambiguity. Problem-Solving: Decomposing strategic direction into projects: Planning, communicating, and executing to solve our most challenging problems. Ensuring alignment with long-term objectives, fostering a culture of informed decision-making and innovation. Anticipating most risks and driving simplification to mitigate risks ahead of time. Escalating issues while solving them in parallel ensuring others are informed. Leadership: Proposing new organization-level processes to improve key areas such as team throughput, employee happiness, or product engagement. Driving best practices across the organization. Exhibiting exceptional mentoring abilities and fostering a culture of continuous learning and improvement by identifying and nurturing potential in others providing strategic guidance helping develop career paths for team members Leading projects. Setting the strategic direction for projects or areas of technology, leading multiple project teams, and influencing decision-making at higher organizational levels. Exhibiting strong capabilities in stakeholder management, negotiating, and problem-solving in complex scenarios. Mentoring and developing other leaders within the team, fostering a culture of innovation, and contributing significantly to organizational goals. Intimate, Working Familiarity With: Go: Architect and deliver high-performance, distributed systems using Go; apply advanced concurrency patterns, performance tuning, and service design principles to build scalable, resilient backend platforms. Azure: Architect and deliver secure, scalable, cloud-native solutions on Microsoft Azure, leveraging services such as Azure Functions, App Service, Azure Kubernetes Service (AKS), Azure Storage, Azure SQL, and Azure Monitor while driving best practices in security, reliability, and cost optimization. Databases (e.g. DynamoDB, PostgreSQL): Architect and optimize scalable data solutions using both NoSQL and relational databases, designing data models, indexing strategies, and performance optimizations to support applications. Strong experience architecting, designing, and implementing backend services with an emphasis on high test coverage at all levels – unit, integration, acceptance, and end-to-end. Experience creating and executing automated tests within CI/CD pipelines using quality gates to ensure reliability and maintainability (e.g. GitHub Actions, CircleCI, Jenkins). Experience with test infrastructure and environments that support backend service validation, including service virtualization and mocking in CI/CD workflows. Experience conducting backend performance and load testing to assess system scalability, latency, and throughput under production-like conditions. General Requirements: 10+ years of development experience with an emphasis on back-end development. 3 years of experience with common stacks and cloud technologies. AWS experience, notably. Extensive experience serving as a trusted consultant to stakeholders and cross-functional teams, providing expert guidance on backend service design, delivery, and integration. Degree in Computer Science or relevant field or experience. Nice to Haves: Experience designing and implementing event-driven architectures using messaging and streaming technologies such as Kafka, Amazon SQS, RabbitMQ, Redpanda, or equivalent platforms. Experience implementing Infrastructure as Code (IaC) using tools such as AWS CDK, Terraform, Chef, Ansible, or similar technologies to automate infrastructure provisioning and management. Experience deploying and managing containerized applications using orchestration platforms such as Kubernetes, Docker Swarm, or equivalent technologies to support scalable, resilient cloud-native applications. A Bit More Info: Minimum Base Compensation: $170,000 This is a full-time position. Stable Kernel operates a People Before Place Hybrid model, allowing most employees to choose where they can do their best work most days. Minimal travel is associated with this role. Our generous total compensation package includes: Company-subsidized health, vision, and dental plan premium options beginning on the first day of employment 401k with above-average company matching Fully paid Group Life, Short and Long Term Disability, and AD&D insurance Optional Flexible Spending Account and Health Savings Account participation Voluntary Life, Critical Illness, and Accident insurance EAP and Health Advocacy program available at no cost to employees and their dependents $3000+ annual industry educational budget Paid time off and paid holidays. *Note – We are not sponsoring employment visas at this time. If you are currently in possession of an employment visa, it will need to be effective for at least 3 years from the date of your application for your candidacy for employment to be considered. Stable Kernel’s culture is inclusive and expansive. We celebrate diversity in its many glorious forms and do not discriminate based on race, religion, color, national origin, gender role orientation, sexual orientation, age, marital status, veteran status, or disability status. However, we will discriminate against those unwilling to comply with the practice of our company values: we work with integrity always we respect our work and each other we are dedicated to life-long learning and sharing we stay hungry for new challenges If you are like-minded in this regard, we hope you will apply. We look forward to meeting you.

Design and implement maintainable full-stack solutions, collaborate with teams, write tests, review code, and mentor junior developers. | 3-6 years development experience with backend focus and a bachelor's degree or equivalent. | About the Company: Stable Kernel is a technology services firm and custom software developer building scalable software solutions for cutting-edge, innovative enterprises to move their business forward. We are headquartered in Atlanta, GA. We’re a privately held, Great Place to Work Certified Company™ with a multi-award-winning culture and an impressive 10-plus-year trajectory of sustainable growth. At Stable Kernel, we support our employees in ways that help them do some of the best work of their lives. About the Role: As a Stable Kernel Software Engineer, you play an essential role in setting our portfolio of world-class clients up for success through the development and delivery of their most innovative, transformational initiatives. You will collaborate daily with other engineers and product team members, make decisions that influence the path of a product roadmap, leverage software development best practices, and become a more well-rounded engineer as you learn new technologies. Your knowledgeable practice, reliability, and consultative nature make you an engineer that stakeholders and teammates trust. Core Responsibilities Include: Technical Impact: Designing and implementing solutions that are efficient, maintainable, and pragmatic while prioritizing the health of affected codebases and clarity of design. Providing detailed and clear feedback and exhibiting a sense of ownership in the codebase. Designing and writing comprehensive test cases, identifying and fixing bugs, applying testing frameworks, and participating in code reviews with a focus on testability and quality assurance. Business Alignment: Understanding the objectives of the project and using that to clarify and improve project plans. Identifying opportunities to provide additional value for our clients by suggesting and delivering improvements based on observations. Understanding of and actively participating in the project estimation process. Interacting with Others: Coordinating with people members on your team, including product and design. Influencing improvements of your team and project. Advising your project team members and direct manager. Bringing unforeseen circumstances and complexities to the team’s attention and coordinating with leadership to address blockers. Autonomy & Ambiguity: Collaborating with team leadership to choose the right solution and requiring no direction on tasks. Breaking down projects in an incremental and cross-functional way that clarifies requirements and contributes to task estimation. Negotiating and working out solutions to ambiguity that helps to simplify. Problem-Solving: Identifying and addressing root causes. Identifying trade-offs and making recommendations. Escalating in difficult situations. Solving difficult problems and removing bottlenecks. Identifying risk and attempting to find a way forward before escalation while providing visibility into risks. Escalating issues and working with the team to provide solutions. Leadership: Guiding them through the codebase and offering advice. Collaboration effectively in pair programming sessions. Conducting code reviews. Contributing to team learning by sharing new tools and best practices. Identifying issues with processes, communicating causes, and proposing improvements. Influencing and implementing prest practices and automating manual tasks to improve the speed of delivery. Mentoring junior developers with technical challenges: Taking ownership of certain project aspects, communicating technical information clearly to team members, and guiding newer developers on specific tasks and procedures. Working Familiarity With: React: Develop, troubleshoot, and maintain React applications, resolving production issues, implementing enhancements, and improving application stability and user experience. TypeScript: Write clean, maintainable TypeScript code while adhering to established coding standards, contributing to feature development, bug fixes, and ongoing application improvements. Go (Golang): Build foundational experience developing and maintaining backend services in Go, contributing to feature development and supporting migration to modern Go-based services. Diagnosing, prioritizing, and resolving production issues and customer-reported defects with a focus on delivering timely, high-quality solutions. Maintaining and improving existing applications by addressing technical debt, implementing small enhancements, and ensuring system reliability. Collaborating closely with senior engineers to support ongoing modernization efforts, including the migration of legacy services to Go. Writing unit and integration tests for new functionality and bug fixes to ensure long-term application stability. Participating in code reviews, sprint planning, and technical discussions while continuously growing technical expertise and contributing to team best practices. Effectively balance support work with feature development, helping improve engineering velocity by reducing operational overhead for the broader team. General Requirements: 3-6 years of development experience with an emphasis on back-end development. Degree in Computer Science or relevant field or experience. A Bit More Info: Minimum Base Compensation: $75 per hour This is a full-time contract position. Stable Kernel operates a People Before Place Hybrid model, allowing most employees to choose where they can do their best work most days. Minimal travel is associated with this role. Our generous total compensation package includes: Company-subsidized health, vision, and dental plan premium options beginning on the first day of employment 401k with above-average company matching Fully paid Group Life, Short and Long Term Disability, and AD&D insurance Optional Flexible Spending Account and Health Savings Account participation Voluntary Life, Critical Illness, and Accident insurance EAP and Health Advocacy program available at no cost to employees and their dependents $3000+ annual industry educational budget *Note – We are not sponsoring employment visas at this time. If you are currently in possession of an employment visa, it will need to be effective for at least 3 years from the date of your application for your candidacy for employment to be considered. Stable Kernel’s culture is inclusive and expansive. We celebrate diversity in its many glorious forms and do not discriminate based on race, religion, color, national origin, gender role orientation, sexual orientation, age, marital status, veteran status, or disability status. However, we will discriminate against those unwilling to comply with the practice of our company values: we work with integrity always we respect our work and each other we are dedicated to life-long learning and sharing we stay hungry for new challenges If you are like-minded in this regard, we hope you will apply. We look forward to meeting you.

Design scalable backend solutions, lead strategic roadmaps, mentor engineers, and collaborate with stakeholders. | 10+ years backend experience with Go, AWS, observability tools, and a relevant degree. | About the Company: Stable Kernel is a technology services firm and custom software developer building scalable software solutions for cutting-edge, innovative enterprises to move their business forward. We are headquartered in Atlanta, GA. We’re a privately held, Great Place to Work Certified Company™ with a multi-award-winning culture and an impressive 10-plus-year trajectory of sustainable growth. At Stable Kernel, we support our employees in ways that help them do some of the best work of their lives. About the Role: As a Stable Kernel Principal Software Engineer, you play an essential role in setting our portfolio of world-class clients up for success through the development and delivery of their most innovative, transformational initiatives. You will collaborate daily with other engineers and product team members, make decisions that influence the path of a product roadmap, leverage software development best practices, and become a more well-rounded engineer as you learn new technologies. Your knowledgeable practice, reliability, and consultative nature make you an engineer that stakeholders and teammates trust. Principal Software Engineers may be classified as individual contributors or people managers with individual contributor responsibilities. Core Responsibilities Include: Technical Impact: Designing and implementing exemplary solutions regarding scalability and cost-effectiveness by making trade-offs between opportunity and complexity. Setting standards for codebase health and promoting best practices throughout the organization. Business Alignment: Clarifying strategic outcomes and influencing roadmaps and projects. Identifying, suggesting, and driving improvements in your customers' end-to-end experience. Aiding in estimating work for new business with more unknowns and coaching others in estimation best practices. Interacting with Others: Coordinating across the entire company. Influencing the entire organization to make changes to support your work. Advising teams across the company. Autonomy & Ambiguity: Designing a long-term roadmap with no direction. Translating customer and business needs and strategic direction into projects and consistently simplifying high-complexity situations. Coaching and mentoring others in tackling ambiguity. Problem-Solving: Planning, communicating, and executing to solve our most challenging problems. Ensuring alignment with long-term objectives, fostering a culture of informed decision-making and innovation. Decomposing strategic direction into projects: Anticipating most risks and driving simplification to mitigate risks ahead of time. Escalating issues while solving them in parallel ensuring others are informed. Leadership: identifying and nurturing potential in others providing strategic guidance helping develop career paths for team members Setting the strategic direction for projects or areas of technology, leading multiple project teams, and influencing decision-making at higher organizational levels. Exhibiting strong capabilities in stakeholder management, negotiating, and problem-solving in complex scenarios. Mentoring and developing other leaders within the team, fostering a culture of innovation, and contributing significantly to organizational goals. Proposing new organization-level processes to improve key areas such as team throughput, employee happiness, or product engagement. Driving best practices across the organization. Exhibiting exceptional mentoring abilities and fostering a culture of continuous learning and improvement by Leading projects. Deep Expertise With: Go: Architect and deliver high-performance, distributed systems using Go; apply advanced concurrency patterns, performance tuning, and service design principles to build scalable, resilient backend platforms. AWS: Design and lead cloud-native architectures on AWS, leveraging services such as ECS/EKS, Lambda, API Gateway, S3, RDS, DynamoDB, CloudWatch, and IAM to deliver secure, scalable, and highly available solutions. Datadog: Implement comprehensive observability strategies using Datadog, including application performance monitoring (APM), distributed tracing, log aggregation, dashboards, and alerting to proactively identify and resolve production issues. Infrastructure as Code (IaC): Design and manage cloud infrastructure using Infrastructure as Code practices and tools (e.g., Terraform or AWS CloudFormation), enabling repeatable, secure, and automated infrastructure provisioning across environments. Strong experience architecting, designing, and implementing backend services with an emphasis on high test coverage at all levels – unit, integration, contract, and end-to-end. Experience creating and executing automated tests within CI/CD pipelines using quality gates to ensure reliability and maintainability (e.g. GitHub Actions, CircleCI, Jenkins). Experience with test infrastructure and environments that support backend service validation, including service virtualization and mocking in CI/CD workflows. Experience conducting backend performance and load testing to assess system scalability, latency, and throughput under production-like conditions. General Requirements: 10+ years of development experience with an emphasis on back-end development. Extensive experience serving as a trusted consultant to stakeholders and cross-functional teams, providing expert guidance on backend service design, delivery, and integration. A curious technologist who explores AI augmented development workflows, leveraging tools such as Anthropic models, Cursor, Copilot with Open Spec, Spec Kit, and related frameworks. Degree in Computer Science or relevant field or experience. A Bit More Info: Minimum Base Compensation: $170,000 This is a full-time position. Stable Kernel operates a People Before Place Hybrid model, allowing most employees to choose where they can do their best work most days. Minimal travel is associated with this role. Our generous total compensation package includes: Company-subsidized health, vision, and dental plan premium options beginning on the first day of employment 401k with above-average company matching Fully paid Group Life, Short and Long Term Disability, and AD&D insurance Optional Flexible Spending Account and Health Savings Account participation Voluntary Life, Critical Illness, and Accident insurance EAP and Health Advocacy program available at no cost to employees and their dependents $3000+ annual industry educational budget *Note – We are not sponsoring employment visas at this time. If you are currently in possession of an employment visa, it will need to be effective for at least 3 years from the date of your application for your candidacy for employment to be considered. Stable Kernel’s culture is inclusive and expansive. We celebrate diversity in its many glorious forms and do not discriminate based on race, religion, color, national origin, gender role orientation, sexual orientation, age, marital status, veteran status, or disability status. However, we will discriminate against those unwilling to comply with the practice of our company values: we work with integrity always we respect our work and each other we are dedicated to life-long learning and sharing we stay hungry for new challenges If you are like-minded in this regard, we hope you will apply. We look forward to meeting you.