Appex Innovation

Design, code, test, and deploy enterprise software using Microsoft technology stack and collaborate with teams to optimize database performance. | Bachelor's degree and 8+ years software development experience with proficiency in C#, .NET, SQL Server, and modern frontend frameworks. | Job Title: Senior .NET Developer Role Overview We are seeking a Senior .NET Developer with at least 8 years of post-graduation software development experience for a 24-month contract role in Albany, NY. This is a critical backfill position on a direct end-client project. The ideal candidate will design, develop, and maintain high-performance enterprise applications using the Microsoft technology stack. Position Details Location: Albany, NY (Onsite / Hybrid as required by client) Duration: 24 Months Requirement: Backfill / Replacement Experience Level: 8+ Years post-graduation (Mandatory) Key Responsibilities Design, code, test, and deploy robust enterprise-level software solutions using C# and .NET Framework/.NET Core. Develop and consume RESTful APIs, Web APIs, and microservices for system integration. Optimize database queries, stored procedures, and schema designs using SQL Server. Collaborate with cross-functional teams, business analysts, and system architects to gather requirements and deliver high-quality code. Perform code reviews, unit testing, and troubleshooting to resolve complex technical bugs. Required Qualifications Education: Bachelor’s degree in Computer Science, Information Technology, or a related field. Experience: Strictly 8+ years of verifiable hands-on .NET software development experience post-graduation. Core Tech Stack: C#, .NET Core / .NET Framework, ASP.NET MVC, Web API. Database: Microsoft SQL Server, T-SQL, Entity Framework, ORM tools. Frontend Technologies: HTML5, CSS3, JavaScript, jQuery, and modern frameworks (Angular or React preferred). Tools & Practices: Azure DevOps/Git, CI/CD pipelines, Agile/Scrum methodologies.

Design and implement core services for an enterprise Notifications platform using Java and cloud-native technologies including AI/GenAI features. | Bachelor's degree and 8-12 years of Java backend and AWS cloud experience with hands-on AI/GenAI production implementation. | We are hiring a Java Developer - Senior with our client in Chicago, IL for a hybrid role. Job Details: Role: Java Developer (Senior) Location: Chicago, IL - hybrid Key Areas: AI-DLC Senior Developer - Notifications Platform & AI Engineering Description - External Domain: Airlines. Experience: 12+ YOE Eligibility: USC, GC,L2S, EADs Type: Contract-W2/ FTE Summary: United's Digital Technology team designs, develops, and maintains massively scaling technology solutions brought to life with innovative architectures, data analytics, digital solutions, and practical AI-enabled capabilities. The Notifications team enables enterprise communication capabilities supporting customer and crew portfolios. This contractor role will focus on hands-on design, development, modernization, and production delivery of notification platform services, integrations, event-driven capabilities, and AI-enabled communication use cases. Key Responsibilities: The role of Senior Developer will have a technical focus on enabling Notifications at the enterprise level and supporting a robust communication platform for customer and crew portfolios. This is a hands-on senior individual contributor role. This is not a management role. The expectation is to actively design, code, debug, optimize, deploy, and support production-grade solutions. • Design AND implement core services for the enterprise Notifications platform, including APIs, event-driven integrations, orchestration components, templates, and platform capabilities. • Write, review, debug, and optimize production code actively; lead through hands-on engineering contribution rather than delegation. • Build cloud-native backend services using Java, Spring Boot, Apache Camel, microservices, container technologies, and AWS services. • Develop and integrate AI/GenAI capabilities hands-on, including prompt design, LLM integration, RAG pipelines, embeddings/vector search, semantic search, classification, summarization, and AI-assisted communication workflows. • Prototype, validate, and productionize AI-enabled features while considering latency, accuracy, cost, monitoring, fallback design, and operational reliability. • Design solutions for high availability, scalability, resiliency, observability, performance, security, privacy, and compliance needs. • Support integrations with internal enterprise systems, eventing platforms, data providers, communication providers, and vendor-managed services as needed. • Troubleshoot and resolve complex production issues directly, including performance bottlenecks, integration failures, data issues, and system reliability concerns. • Work closely with architects, product owners, business stakeholders, development teams, and vendor teams to convert requirements into working solutions. • Contribute to technical design, system documentation, code reviews, automated testing, CI/CD pipelines, release readiness, and production support practices. • Ensure solutions are aligned with enterprise engineering standards, security expectations, and application lifecycle best practices. • Mentor developers through code-level guidance, design reviews, and engineering best practices; however, the primary expectation remains hands-on delivery. Qualifications - External What is needed to succeed (Minimum Qualifications): • Bachelor's degree in Computer Science, Information Systems, Engineering, related field, or equivalent work experience required. • Minimum 8 years of overall experience in software engineering, application development, integration, and SDLC delivery. • Strong recent hands-on software development experience; candidate must be comfortable spending majority of time coding, debugging, designing, and delivering working software. • Minimum 8 years of hands-on Java backend development experience, including Spring Boot, REST APIs, microservices, and open-source technologies. • Minimum 3 years of hands-on experience with event-driven systems, messaging, streaming, integration, or notification platform capabilities. • Hands-on experience with Apache Camel or equivalent enterprise integration frameworks. • Minimum 4 years of hands-on experience with AWS or equivalent cloud services such as EC2, S3, RDS, VPC, CloudFront, Lambda, EKS, ECS, API Gateway, DynamoDB, DocumentDB, AmazonMQ, or related services. • Strong hands-on AI/GenAI implementation experience in enterprise or production-grade applications; AI experience should not be limited to strategy, vendor discussions, or conceptual understanding. • Practical experience involves personally implementing one or more AI capabilities such as LLM integration, prompt engineering, RAG, embeddings/vector search, semantic search, classification, summarization, AI-assisted workflow automation, or decision-support capabilities. • Understanding responsible AI and secure AI engineering practices, including data privacy, access control, guardrails, evaluation, monitoring, hallucination risk, human review where needed, and auditability. • Experience with observability and analytics tools such as Dynatrace, ELK Stack, CloudWatch, or equivalent tools. • Experience working in agile delivery environments where CI/CD, automated testing, code quality, deployment readiness, and production support are critical. • Demonstrated knowledge of software engineering best practices such as version control, software packaging, release management, automated testing, secure coding, and operational readiness. • Strong analytical and problem-solving skills with ability to diagnose complex technical issues independently. • Must be self-motivated, collaborative, and able to communicate effectively with technical and non-technical stakeholders. What will help you propel from the pack (Preferred Qualifications): • Experience designing and developing enterprise notification, communication, customer messaging, content management, or eventing platform solutions. • Experience with Twilio or similar communication/messaging platforms. • Experience applying AI to communication use cases such as personalization, routing, prioritization, content quality checks, template assistance, intent classification, summarization, or operational anomaly detection. • Experience with AI observability, LLMOps/MLOps practices, model/prompt evaluation, AI guardrails, and production monitoring of AI-enabled features. • AWS certification or equivalent cloud certification. • Experience in high-scale, 24x7 production environments. • Airline, travel, customer platforms, or crew operations domain experience. Candidate Profile Guidance for Vendors: • Submit candidates with strong hands-on individual contributor experience, not primarily people management profiles. • Candidate should show recent coding and production delivery experience in Java/backend/cloud systems. • Candidate should have real implementation experience in AI/GenAI capabilities, not only AI awareness, training, governance, or tool evaluation experience. • Profiles that are architecture-only, governance-heavy, or delivery-management focused without recent hands-on coding will not be a fit. Role Type: • Senior hands-on individual contributor role within the Notifications platform team. • Primary focus is hands-on engineering delivery, production support, and AI-enabled platform implementation.

Develop and maintain software applications using the .NET framework and related technologies. | Proven experience with .NET, C#, SQL Server, AWS services, microservices, and DevOps tools is required. | We are hiring a .NET Developer with our client in Houston, TX for a Hybrid role. Job Details: Role: .NET Developer Location - Houston - Hybrid, could do Chicago, IL Work Authorization - USC or Green Card Domain: Airlines Type: Contract-W2 Job Summary: Program and build software using languages and technologies of the .NET framework. You will create applications from scratch, configure existing systems and provide user support. Primary Responsibilities: Participate in requirements analysis Collaborate with internal teams to produce software design and architecture Write clean, scalable code using .NET programming languages Test and deploy applications and systems Revise, update, refactor and debug code Improve existing software Develop documentation throughout the software development life cycle (SDLC) Serve as an expert on applications and provide technical support Qualifications: Proven experience as a .NET Developer Familiarity with the ASP.NET framework, SQL Server and design/architectural patterns (e.g. Model-View-Controller (MVC)) Knowledge of at least one of the .NET languages (e.g. C#, Visual Basic .NET) and HTML5/CSS3 Familiarity with architecture styles/APIs (REST, RPC) Understanding of Agile methodologies • Top 3 skill sets required for this role: o 1. Advanced .NET o 2. Architecture exp. o 3. AWS - Native o 4. DevOps, Cloud • Nice to have skills or certifications: o 1. AI/Copilot/GenAI o 2. Strong communication skills (Oral and Written) o 3. Independent thinker / Self Driven Advanced .NET (C#, .NET Core8/10), REST APIs, microservices AWS-native services: Lambda, API Gateway, S3, DynamoDB, MongoDB, RDS, SQS/SNS, IAM, VPC Cloud architecture & leadership: design reviews, mentoring, solution ownership DevOps: CI/CD (GitHub Actions/Azure DevOps), Docker, Kubernetes, IaC (CloudFormation/Terraform) Observability & reliability: CloudWatch, Dynatrace, logging, monitoring, performance tuning AI-assisted development (medium): GitHub Copilot, basic LLM integration