{"schemaVersion":"jobsearcher.job.v1","id":"4226b7795c9527a1511d2d69","url":"https://jobsearcher.com/jobs/4226b7795c9527a1511d2d69","canonicalUrl":"https://jobsearcher.com/jobs/4226b7795c9527a1511d2d69","title":"Fullstack Integration Engineer","description":"Senior Full-Stack Integration Engineer\nLocation: Remote – United States\nExperience: 5+ years of professional software engineering experience\nWe 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.\nThe 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.\nResponsibilities\nDesign, develop, test, and maintain backend services using Node.js and TypeScript\nBuild and enhance frontend application features using React and TypeScript\nDesign and develop REST and/or GraphQL APIs for use by external partners\nIntegrate applications with third-party platforms, vendors, and partner systems\nBuild and operate cloud-based services within AWS\nDevelop serverless applications using services such as AWS Lambda and API Gateway\nDesign and maintain production data models using relational or document databases\nCollaborate with product, engineering, and external partner teams to define integration requirements\nTroubleshoot API, data, and integration issues across distributed systems\nParticipate in code reviews, testing, deployment, and ongoing application support\nHelp establish scalable development practices for partner integrations and cloud services\nRequired Qualifications\n5+ years of professional software engineering experience\nStrong backend development experience with Node.js\nAdvanced TypeScript experience across backend and frontend applications\nProfessional frontend development experience using React\nProduction experience with a relational or document database, preferably PostgreSQL or MongoDB\nExperience building and operating applications or services within AWS\nHands-on experience integrating with third-party or external partner systems\nExperience designing and developing externally consumed REST and/or GraphQL APIs\nStrong understanding of API security, authentication, error handling, and data validation\nAbility to work effectively in a remote, collaborative engineering environment\nPreferred Qualifications\nExperience with NestJS\nProduction experience with MongoDB\nExperience developing GraphQL APIs\nExperience with AWS serverless technologies, including Lambda and API Gateway\nPrevious government or public-sector delivery experience\nExperience supporting applications with multiple external partner integrations\nFamiliarity with automated testing, CI/CD pipelines, monitoring, and production support\nThis is a remote opportunity available to candidates located within the United States.\nSystem One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.\nSystem One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.\n#M1\n#LI-CS1\nRef: #851-Rockville-S1","company":"Systemone","rawCompany":"systemone","city":"Virginia","state":"MN","isRemote":false,"isActive":false,"createdAt":"2026-07-31T12:02:19.753Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1254.00","title":"Web Developers","slug":"web-developers"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Fullstack Integration Engineer","description":"Senior Full-Stack Integration Engineer\nLocation: Remote – United States\nExperience: 5+ years of professional software engineering experience\nWe 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.\nThe 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.\nResponsibilities\nDesign, develop, test, and maintain backend services using Node.js and TypeScript\nBuild and enhance frontend application features using React and TypeScript\nDesign and develop REST and/or GraphQL APIs for use by external partners\nIntegrate applications with third-party platforms, vendors, and partner systems\nBuild and operate cloud-based services within AWS\nDevelop serverless applications using services such as AWS Lambda and API Gateway\nDesign and maintain production data models using relational or document databases\nCollaborate with product, engineering, and external partner teams to define integration requirements\nTroubleshoot API, data, and integration issues across distributed systems\nParticipate in code reviews, testing, deployment, and ongoing application support\nHelp establish scalable development practices for partner integrations and cloud services\nRequired Qualifications\n5+ years of professional software engineering experience\nStrong backend development experience with Node.js\nAdvanced TypeScript experience across backend and frontend applications\nProfessional frontend development experience using React\nProduction experience with a relational or document database, preferably PostgreSQL or MongoDB\nExperience building and operating applications or services within AWS\nHands-on experience integrating with third-party or external partner systems\nExperience designing and developing externally consumed REST and/or GraphQL APIs\nStrong understanding of API security, authentication, error handling, and data validation\nAbility to work effectively in a remote, collaborative engineering environment\nPreferred Qualifications\nExperience with NestJS\nProduction experience with MongoDB\nExperience developing GraphQL APIs\nExperience with AWS serverless technologies, including Lambda and API Gateway\nPrevious government or public-sector delivery experience\nExperience supporting applications with multiple external partner integrations\nFamiliarity with automated testing, CI/CD pipelines, monitoring, and production support\nThis is a remote opportunity available to candidates located within the United States.\nSystem One, and its subsidiaries including Joulé and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.\nSystem One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.\n#M1\n#LI-CS1\nRef: #851-Rockville-S1","datePosted":"2026-07-31T12:02:19.753Z","dateModified":"2026-07-31T12:02:19.753Z","hiringOrganization":{"@type":"Organization","name":"Systemone","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Virginia","addressRegion":"MN","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"4226b7795c9527a1511d2d69"},"url":"https://jobsearcher.com/jobs/4226b7795c9527a1511d2d69"}}