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# Fullstack Integration Engineer

- **Company:** System One
- **Location:** United States (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Amazon Web Services, User Authentication, Automation of Tests, Software as a Service, Code Review, Databases, Data Validation, Distributed Systems, Document-Oriented Databases, PostgreSQL, MongoDB, Node.Js, Operational Databases, Cloud Services, Software Engineering, Systems Integration, TypeScript, ReactJS, Software Security, AWS Lambda, Backend, Graphql, Front End Software Development, Api Gateway, NestJS, Serverless Computing
- **Published:** July 16, 2026
- **Apply:** https://dejobs.org/x/x/84777668B99F4C9F88428FF09FEE5886/job/

## About the Role

Experience: 5+ years of professional software engineering experience

We are seeking a Senior Full-Stack Integration Engineer to design, build, and support cloud-based applications, APIs, and external partner integrations. This position is best suited for a backend-leaning full-stack engineer with strong experience in Node.js, TypeScript, React, AWS, and production database environments.

The ideal candidate will have hands-on experience developing partner-facing APIs, integrating third-party systems, and building reliable cloud services used by external customers and business partners., * 5+ years of professional software engineering experience

 * Strong backend development experience with Node.js
 * Advanced TypeScript experience across backend and frontend applications
 * Professional frontend development experience using React
 * Production experience with a relational or document database, preferably PostgreSQL or MongoDB
 * Experience building and operating applications or services within AWS
 * Hands-on experience integrating with third-party or external partner systems
 * Experience designing and developing externally consumed REST and/or GraphQL APIs
 * Strong understanding of API security, authentication, error handling, and data validation
 * Ability to work effectively in a remote, collaborative engineering environment, * Experience with NestJS
 * Production experience with MongoDB
 * Experience developing GraphQL APIs
 * Experience with AWS serverless technologies, including Lambda and API Gateway
 * Previous government or public-sector delivery experience
 * Experience supporting applications with multiple external partner integrations
 * Familiarity with automated testing, CI/CD pipelines, monitoring, and production support

## Description

* Design, develop, test, and maintain backend services using Node.js and TypeScript
 * Build and enhance frontend application features using React and TypeScript
 * Design and develop REST and/or GraphQL APIs for use by external partners
 * Integrate applications with third-party platforms, vendors, and partner systems
 * Build and operate cloud-based services within AWS
 * Develop serverless applications using services such as AWS Lambda and API Gateway
 * Design and maintain production data models using relational or document databases
 * Collaborate with product, engineering, and external partner teams to define integration requirements
 * Troubleshoot API, data, and integration issues across distributed systems
 * Participate in code reviews, testing, deployment, and ongoing application support
 * Help establish scalable development practices for partner integrations and cloud services


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