Kellton

Design, build, test, deploy, and maintain complex web applications using AWS cloud and microservices architecture. | Senior-level experience with NodeJS, React, AWS services, microservices, and strong communication skills. | Position: Senior Fullstack Engineer (AWS, NodeJS, Javascript) Location: Remote Duration: Long Term Contract Required Skills: • Designs, Builds, tests, deploys and maintains production code for complex web-based applications using Cloud technologies and micro-services with AWS services. • Expert level experience in NodeJS and scripting in a Cloud based environment • Advanced level of experience with React & UI frameworks, tools and technologies • Develops comprehensive test plans and automation test suites. • Demonstrated advanced experience with AWS Lambda, SNS/SQS, S3, IAM, CloudWatch, RDS and DynamoDB, AWS CICD/CDK devops • Demonstrated experience in developing and monitoring full stack solutions with microservice architecture using NodeJS • Responsible for support of and coordinating with other Engineers, Architects and teams including other technology teams such as a User Experience team or an infrastructure team. • Effective communication skills are a must along with a strong customer service orientation, and the ability to clearly discern client needs. • Fundamentals in OO and computer science foundation principles. Preferred Skills: • High analytical skills and knack to develop and montor tools for High frequency web apps and data services. • Experience working on Agile teams with the scrum team member attitude – willingness to support the Team to be successful in any area necessary • Advanced demonstrated experience with AWS cloud supported programming languages like JavaScript, TypeScript, or Python. • Experience with relational databases, and NoSQL databases • Experience building infrastructure as code using AWS CloudFormation or similar scripting techniques • Appetite to Learn new things Education/Certifications: • Bachelor’s degree and/or other advanced degree(s) • Relevant AWS or other professional certifications

Design, build, test, deploy, and maintain complex web applications using AWS cloud services and microservices architecture. | Senior-level experience with NodeJS, React, AWS cloud services, microservices, and strong communication skills. | Position: Senior Fullstack Engineer (AWS, NodeJS, Javascript) Location: Remote Duration: Long Term Contract Required Skills: • Designs, Builds, tests, deploys and maintains production code for complex web-based applications using Cloud technologies and micro-services with AWS services. • Expert level experience in NodeJS and scripting in a Cloud based environment • Advanced level of experience with React & UI frameworks, tools and technologies • Develops comprehensive test plans and automation test suites. • Demonstrated advanced experience with AWS Lambda, SNS/SQS, S3, IAM, CloudWatch, RDS and DynamoDB, AWS CICD/CDK devops • Demonstrated experience in developing and monitoring full stack solutions with microservice architecture using NodeJS • Responsible for support of and coordinating with other Engineers, Architects and teams including other technology teams such as a User Experience team or an infrastructure team. • Effective communication skills are a must along with a strong customer service orientation, and the ability to clearly discern client needs. • Fundamentals in OO and computer science foundation principles. Preferred Skills: • High analytical skills and knack to develop and montor tools for High frequency web apps and data services. • Experience working on Agile teams with the scrum team member attitude – willingness to support the Team to be successful in any area necessary • Advanced demonstrated experience with AWS cloud supported programming languages like JavaScript, TypeScript, or Python. • Experience with relational databases, and NoSQL databases • Experience building infrastructure as code using AWS CloudFormation or similar scripting techniques • Appetite to Learn new things Education/Certifications: • Bachelor’s degree and/or other advanced degree(s) • Relevant AWS or other professional certifications

Design, build, test, deploy, and maintain complex web applications using AWS cloud and microservices architecture with NodeJS and React. | Senior-level experience with AWS services, NodeJS, React, microservices, and cloud-based CI/CD, plus strong communication and teamwork skills. | Position: Senior Fullstack Engineer (AWS, NodeJS, Javascript) Location: Remote Duration: Long Term Contract Required Skills: • Designs, Builds, tests, deploys and maintains production code for complex web-based applications using Cloud technologies and micro-services with AWS services. • Expert level experience in NodeJS and scripting in a Cloud based environment • Advanced level of experience with React & UI frameworks, tools and technologies • Develops comprehensive test plans and automation test suites. • Demonstrated advanced experience with AWS Lambda, SNS/SQS, S3, IAM, CloudWatch, RDS and DynamoDB, AWS CICD/CDK devops • Demonstrated experience in developing and monitoring full stack solutions with microservice architecture using NodeJS • Responsible for support of and coordinating with other Engineers, Architects and teams including other technology teams such as a User Experience team or an infrastructure team. • Effective communication skills are a must along with a strong customer service orientation, and the ability to clearly discern client needs. • Fundamentals in OO and computer science foundation principles. Preferred Skills: • High analytical skills and knack to develop and montor tools for High frequency web apps and data services. • Experience working on Agile teams with the scrum team member attitude – willingness to support the Team to be successful in any area necessary • Advanced demonstrated experience with AWS cloud supported programming languages like JavaScript, TypeScript, or Python. • Experience with relational databases, and NoSQL databases • Experience building infrastructure as code using AWS CloudFormation or similar scripting techniques • Appetite to Learn new things Education/Certifications: • Bachelor’s degree and/or other advanced degree(s) • Relevant AWS or other professional certifications

Design, build, test, deploy, and maintain complex web applications using AWS cloud and microservices architecture. | Senior-level experience with NodeJS, AWS services, React, microservices, and strong communication skills. | Position: Senior Fullstack Engineer (AWS, NodeJS, Javascript) Location: Remote Duration: Long Term Contract Required Skills: • Designs, Builds, tests, deploys and maintains production code for complex web-based applications using Cloud technologies and micro-services with AWS services. • Expert level experience in NodeJS and scripting in a Cloud based environment • Advanced level of experience with React & UI frameworks, tools and technologies • Develops comprehensive test plans and automation test suites. • Demonstrated advanced experience with AWS Lambda, SNS/SQS, S3, IAM, CloudWatch, RDS and DynamoDB, AWS CICD/CDK devops • Demonstrated experience in developing and monitoring full stack solutions with microservice architecture using NodeJS • Responsible for support of and coordinating with other Engineers, Architects and teams including other technology teams such as a User Experience team or an infrastructure team. • Effective communication skills are a must along with a strong customer service orientation, and the ability to clearly discern client needs. • Fundamentals in OO and computer science foundation principles. Preferred Skills: • High analytical skills and knack to develop and montor tools for High frequency web apps and data services. • Experience working on Agile teams with the scrum team member attitude – willingness to support the Team to be successful in any area necessary • Advanced demonstrated experience with AWS cloud supported programming languages like JavaScript, TypeScript, or Python. • Experience with relational databases, and NoSQL databases • Experience building infrastructure as code using AWS CloudFormation or similar scripting techniques • Appetite to Learn new things Education/Certifications: • Bachelor’s degree and/or other advanced degree(s) • Relevant AWS or other professional certifications

Design, build, test, deploy, and maintain complex web applications using cloud technologies and microservices. | Senior-level experience with NodeJS, AWS services, React, microservices architecture, and strong communication skills. | Position: Senior Fullstack Engineer (AWS, NodeJS, Javascript) Location: Remote Duration: Long Term Contract Required Skills: • Designs, Builds, tests, deploys and maintains production code for complex web-based applications using Cloud technologies and micro-services with AWS services. • Expert level experience in NodeJS and scripting in a Cloud based environment • Advanced level of experience with React & UI frameworks, tools and technologies • Develops comprehensive test plans and automation test suites. • Demonstrated advanced experience with AWS Lambda, SNS/SQS, S3, IAM, CloudWatch, RDS and DynamoDB, AWS CICD/CDK devops • Demonstrated experience in developing and monitoring full stack solutions with microservice architecture using NodeJS • Responsible for support of and coordinating with other Engineers, Architects and teams including other technology teams such as a User Experience team or an infrastructure team. • Effective communication skills are a must along with a strong customer service orientation, and the ability to clearly discern client needs. • Fundamentals in OO and computer science foundation principles. Preferred Skills: • High analytical skills and knack to develop and montor tools for High frequency web apps and data services. • Experience working on Agile teams with the scrum team member attitude – willingness to support the Team to be successful in any area necessary • Advanced demonstrated experience with AWS cloud supported programming languages like JavaScript, TypeScript, or Python. • Experience with relational databases, and NoSQL databases • Experience building infrastructure as code using AWS CloudFormation or similar scripting techniques • Appetite to Learn new things Education/Certifications: • Bachelor’s degree and/or other advanced degree(s) • Relevant AWS or other professional certifications

Design, build, test, deploy, and maintain complex web applications using AWS cloud and microservices architecture. | Senior-level experience with NodeJS, React, AWS services, microservices, and strong communication skills. | Position: Senior Fullstack Engineer (AWS, NodeJS, Javascript) Location: Remote Duration: Long Term Contract Required Skills: • Designs, Builds, tests, deploys and maintains production code for complex web-based applications using Cloud technologies and micro-services with AWS services. • Expert level experience in NodeJS and scripting in a Cloud based environment • Advanced level of experience with React & UI frameworks, tools and technologies • Develops comprehensive test plans and automation test suites. • Demonstrated advanced experience with AWS Lambda, SNS/SQS, S3, IAM, CloudWatch, RDS and DynamoDB, AWS CICD/CDK devops • Demonstrated experience in developing and monitoring full stack solutions with microservice architecture using NodeJS • Responsible for support of and coordinating with other Engineers, Architects and teams including other technology teams such as a User Experience team or an infrastructure team. • Effective communication skills are a must along with a strong customer service orientation, and the ability to clearly discern client needs. • Fundamentals in OO and computer science foundation principles. Preferred Skills: • High analytical skills and knack to develop and montor tools for High frequency web apps and data services. • Experience working on Agile teams with the scrum team member attitude – willingness to support the Team to be successful in any area necessary • Advanced demonstrated experience with AWS cloud supported programming languages like JavaScript, TypeScript, or Python. • Experience with relational databases, and NoSQL databases • Experience building infrastructure as code using AWS CloudFormation or similar scripting techniques • Appetite to Learn new things Education/Certifications: • Bachelor’s degree and/or other advanced degree(s) • Relevant AWS or other professional certifications

Design, build, test, deploy, and maintain production code for complex web applications using AWS and microservices. | Senior-level experience with NodeJS, React, AWS services, cloud-based microservices, and strong communication skills. | Position: Senior Fullstack Engineer (AWS, NodeJS, Javascript) Location: Remote Duration: Long Term Contract Required Skills: • Designs, Builds, tests, deploys and maintains production code for complex web-based applications using Cloud technologies and micro-services with AWS services. • Expert level experience in NodeJS and scripting in a Cloud based environment • Advanced level of experience with React & UI frameworks, tools and technologies • Develops comprehensive test plans and automation test suites. • Demonstrated advanced experience with AWS Lambda, SNS/SQS, S3, IAM, CloudWatch, RDS and DynamoDB, AWS CICD/CDK devops • Demonstrated experience in developing and monitoring full stack solutions with microservice architecture using NodeJS • Responsible for support of and coordinating with other Engineers, Architects and teams including other technology teams such as a User Experience team or an infrastructure team. • Effective communication skills are a must along with a strong customer service orientation, and the ability to clearly discern client needs. • Fundamentals in OO and computer science foundation principles. Preferred Skills: • High analytical skills and knack to develop and montor tools for High frequency web apps and data services. • Experience working on Agile teams with the scrum team member attitude – willingness to support the Team to be successful in any area necessary • Advanced demonstrated experience with AWS cloud supported programming languages like JavaScript, TypeScript, or Python. • Experience with relational databases, and NoSQL databases • Experience building infrastructure as code using AWS CloudFormation or similar scripting techniques • Appetite to Learn new things Education/Certifications: • Bachelor’s degree and/or other advanced degree(s) • Relevant AWS or other professional certifications

Design, build, test, deploy, and maintain production code for complex web applications using AWS cloud technologies and microservices. | Senior-level experience with NodeJS, AWS services, React, microservices architecture, and strong communication skills. | Position: Senior Fullstack Engineer (AWS, NodeJS, Javascript) Location: Remote Duration: Contract-to-Hire Required Skills: • Designs, Builds, tests, deploys and maintains production code for complex web-based applications using Cloud technologies and micro-services with AWS services. • Expert level experience in NodeJS and scripting in a Cloud based environment • Advanced level of experience with React & UI frameworks, tools and technologies • Develops comprehensive test plans and automation test suites. • Demonstrated advanced experience with AWS Lambda, SNS/SQS, S3, IAM, CloudWatch, RDS and DynamoDB, AWS CICD/CDK devops • Demonstrated experience in developing and monitoring full stack solutions with microservice architecture using NodeJS • Responsible for support of and coordinating with other Engineers, Architects and teams including other technology teams such as a User Experience team or an infrastructure team. • Effective communication skills are a must along with a strong customer service orientation, and the ability to clearly discern client needs. • Fundamentals in OO and computer science foundation principles. Preferred Skills: • High analytical skills and knack to develop and montor tools for High frequency web apps and data services. • Experience working on Agile teams with the scrum team member attitude – willingness to support the Team to be successful in any area necessary • Advanced demonstrated experience with AWS cloud supported programming languages like JavaScript, TypeScript, or Python. • Experience with relational databases, and NoSQL databases • Experience building infrastructure as code using AWS CloudFormation or similar scripting techniques • Appetite to Learn new things Education/Certifications: • Bachelor’s degree and/or other advanced degree(s) • Relevant AWS or other professional certifications

Lead backend microservices architecture, oversee offshore engineers, design APIs and database schemas, and ensure CI/CD pipeline compliance. | 6-8 years backend development with Python and TypeScript, leadership experience, Azure SQL and Service Bus proficiency, and strong communication skills. | Kellton Tech is a full-service software development company, offering end-to-end IT solutions, strategic technology consulting and product development services in Web, SMAC (Social, Mobile, Analytics, Cloud), ERP-BPM, and IoT space Our methodology of inventing infinite possibilities with technology helps us develop best in-class and cost effective solutions for our clients. Currently Kellton Tech is looking for talented resources for one of our listed client. Below are the position details Role: Sr. Backend Engineer (Python) Location: Washington, DC (remote) Duration: Long term Contract About the Role The onshore Senior Back-End Engineer leads backend microservices architecture and build quality for the platform, directing a pod of offshore back-end engineers while remaining hands-on in service design, API contract ownership, and CI/CD pipeline governance. In this role, you will serve as the technical authority on all backend decisions, from Azure SQL cache schema design through write-path logic, Azure Service Bus patterns, and security compliance. You will work closely with the onshore Solution Architect, Integration Lead, and Sr. Front-End Engineer to ensure the backend layer is production-ready and validated every sprint. While the center of gravity for this role is the backend, we're looking for a full-stack engineer who is comfortable working across the stack from API and data layer design through the React/TypeScript frontend that consumes them. Responsibilities As the Senior Back-End Engineer, you will set architectural standards, oversee service layer quality, and guide offshore engineering efforts. Your core responsibilities include: - Architecture & Leadership: Lead backend microservices architecture, defining service boundaries, API contract standards, and write-path design patterns across all functional areas. Direct and oversee a pod of offshore back-end engineers by assigning work, conducting code reviews, and ensuring production-ready output. - Database & API Layer Design: Design and own the Azure SQL transactional cache schema. Design and implement REST API endpoints exposed through Azure API Management (APIM), consumed by the React frontend. - Integration & Business Logic: Implement write-path logic that routes commit actions (budget approvals, PO releases, change orders) through Azure Service Bus to OIC flows and back to the ERP. Enforce business logic, data validation, and error handling standards within the service layer. - Pipeline Compliance & Security: Own CI/CD pipeline compliance for backend code, ensuring all commits pass Veracode SAST + SCA security scanning before merging. - Demos & Client Handoff: Lead bi-weekly sprint demos for backend workstreams, ensuring all service layer work is demo-ready on schedule. Resolve and triage backend defects during SIT, UAT, and post-launch hypercare within agreed SLA windows. Conduct knowledge transfer to the client team ahead of the support handoff. Qualifications Required Skills & Experience - 6 8 years of back-end development experience, with strong proficiency in Python and TypeScript/Node.js. - Full-stack experience with a backend bent able to contribute to a React/TypeScript frontend when needed. - Demonstrable experience leading or directing offshore back-end engineering teams. - Strong experience designing and building REST APIs exposed through an API gateway (Azure APIM preferred). - Proficiency with Azure SQL, schema design, query optimization, and working with a delta-refreshed transactional cache pattern. - Experience with Azure Service Bus or similar async messaging infrastructure, including retry logic, dead-letter handling, and error queues. - Solid understanding of microservices architecture and separation of concerns between API gateway, service layer, and data layer. - Proficiency with Azure DevOps CI/CD pipelines and security-gated build processes (Veracode or similar SAST tools). - Experience using AI coding assistants (e.g., Claude Code, GitHub Copilot, Cursor) for pair programming, service design, architecture documentation, and code review (AI-assisted development is standard practice on this engagement). - Strong verbal and written communication skills with the ability to lead sprint demos, run code reviews with offshore teams, and communicate technical decisions to non-technical stakeholders. Preferred Qualifications - Prior experience building enterprise financial or ERP applications. - Experience integrating with Oracle Fusion Cloud or similar ERP platforms via REST/SOAP APIs. - Familiarity with event-driven architecture patterns: Service Bus, event triggers, idempotency, retry/dead-letter handling. - Azure-certified or demonstrable hands-on Azure cloud experience (AZ-204 Developer or AZ-305 Solutions Architect preferred). Apply: Interested candidates can apply with their detailed word formatted resume along with their contact information\availability to raj (dot) sekhar (at) kellton (dot) com Phone 703-5 9 2 .9.5.1.7 Thanks for all your time!