{"schemaVersion":"jobsearcher.job.v1","id":"b9074a3131edd0a7203300d5","url":"https://jobsearcher.com/jobs/b9074a3131edd0a7203300d5","canonicalUrl":"https://jobsearcher.com/jobs/b9074a3131edd0a7203300d5","title":"API Developer (Node.js + Express) - Contract","description":"KAYGEN is an emerging leader in providing top talent for technology-based staffing services. We specialize in providing high-volume contingent staffing, direct hire staffing and project-based solutions to companies worldwide ranging from startups to Fortune 500 and Managed Service Providers (MSP) across a wide variety of industries.Title: API Developer (Node.js + Express)Duration: Through 4/30/27Location: RemoteResponsibilitiesBackend Node.js API Developer - Specialty Referrals Engagement Context Supports the Primary Care Specialty Referrals workstream, building and maintaining backend services that power referral decisioning workflows, helping primary care providers select the most appropriate specialty for a patient's care needs.Design, build, and maintain RESTful APIs supporting specialty referral decisioning workflows, including specialty recommendation logic, provider/specialist matching, and notificationsImplement and maintain the business rules and decision logic that drive specialty recommendations based on patient and referral dataDesign and optimize database schemas for referral, provider, and status data; write efficient queries and manage migrations as the data model evolves Integrate with upstream and downstream systems (EHR, scheduling, provider directory, or prior authorization services as applicable to the workstream)Implement data validation, error handling, and audit logging appropriate for a healthcare production environmentPartner with front-end, integration, and QA teams to deliver end-to-end featuresSupport performance tuning, security hardening, and observability (logging, monitoring, alerting)Participate in code reviews, CI/CD pipeline maintenance, and technical documentation Collaborate with the product/BA team to translate referral decisioning requirements into technical designsRequired Skills4+ years of professional experience with Node.js and Express Strong grasp of RESTful API design, versioning, and JSON schema validation Strong database skills, including schema design, indexing, and query optimization, with hands-on experience in PostgreSQL and tools such as PgAdmin, Prisma, and Liquibase for schema management and migrationsExperience implementing business rules or decision-logic engines within backend services Experience with unit and integration testing (Jest, Mocha, or similar)Familiarity with CI/CD tooling (GitHub Actions, GitOps) Experience with cloud-native development; GCP experience preferred Preferred Qualifications Healthcare payer or provider industry experienceFamiliarity with referral management, specialty recommendation, or prior authorization workflows Exposure to healthcare data standards (HL7, FHIR, or X12 275/278) is a plusPrior experience in a consulting or client-facing delivery environmentRate: $40 - 50/hourAt KAYGEN, people are at the heart of everything we do. We foster a diverse, inclusive, and employee-driven culture where every individual is valued, empowered, and encouraged to bring their authentic self to work. Our candidate-first approach means we are committed to understanding your career goals and connecting you with opportunities that align with your aspirations, skills, and potential. Whether you're taking the next step in your career or searching for your dream opportunity, KAYGEN is more than a staffing partner-we're a community dedicated to helping you grow, succeed, and thrive. Join us and discover a place where your talent is recognized, your ambitions are supported, and your future is built alongside a team that invests in your success every step of the way.Our team of experienced staffing experts will work with you to find you the best opportunity. For more information, please visit us at www.kaygen.com.Benefits:Free Healthcare Insurance401(k) Retirement PlanFree Life InsuranceSick Time OffAchieve your Kaizen by clicking here. A unique and exclusive talent community supported by KAYGEN, that includes programs like:Mentorship ProgramCertificationsReferralsFamily and Wellness benefitsContinuous Growth and Career Development","company":"Kaygen","rawCompany":"kaygen","city":"Denver","state":"CO","isRemote":false,"isActive":false,"createdAt":"2026-09-19T13:12:27.163Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1254.00","title":"Web Developers","slug":"web-developers"},{"code":"15-1251.00","title":"Computer Programmers","slug":"computer-programmers"}],"industries":[{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"API Developer (Node.js + Express) - Contract","description":"KAYGEN is an emerging leader in providing top talent for technology-based staffing services. We specialize in providing high-volume contingent staffing, direct hire staffing and project-based solutions to companies worldwide ranging from startups to Fortune 500 and Managed Service Providers (MSP) across a wide variety of industries.Title: API Developer (Node.js + Express)Duration: Through 4/30/27Location: RemoteResponsibilitiesBackend Node.js API Developer - Specialty Referrals Engagement Context Supports the Primary Care Specialty Referrals workstream, building and maintaining backend services that power referral decisioning workflows, helping primary care providers select the most appropriate specialty for a patient's care needs.Design, build, and maintain RESTful APIs supporting specialty referral decisioning workflows, including specialty recommendation logic, provider/specialist matching, and notificationsImplement and maintain the business rules and decision logic that drive specialty recommendations based on patient and referral dataDesign and optimize database schemas for referral, provider, and status data; write efficient queries and manage migrations as the data model evolves Integrate with upstream and downstream systems (EHR, scheduling, provider directory, or prior authorization services as applicable to the workstream)Implement data validation, error handling, and audit logging appropriate for a healthcare production environmentPartner with front-end, integration, and QA teams to deliver end-to-end featuresSupport performance tuning, security hardening, and observability (logging, monitoring, alerting)Participate in code reviews, CI/CD pipeline maintenance, and technical documentation Collaborate with the product/BA team to translate referral decisioning requirements into technical designsRequired Skills4+ years of professional experience with Node.js and Express Strong grasp of RESTful API design, versioning, and JSON schema validation Strong database skills, including schema design, indexing, and query optimization, with hands-on experience in PostgreSQL and tools such as PgAdmin, Prisma, and Liquibase for schema management and migrationsExperience implementing business rules or decision-logic engines within backend services Experience with unit and integration testing (Jest, Mocha, or similar)Familiarity with CI/CD tooling (GitHub Actions, GitOps) Experience with cloud-native development; GCP experience preferred Preferred Qualifications Healthcare payer or provider industry experienceFamiliarity with referral management, specialty recommendation, or prior authorization workflows Exposure to healthcare data standards (HL7, FHIR, or X12 275/278) is a plusPrior experience in a consulting or client-facing delivery environmentRate: $40 - 50/hourAt KAYGEN, people are at the heart of everything we do. We foster a diverse, inclusive, and employee-driven culture where every individual is valued, empowered, and encouraged to bring their authentic self to work. Our candidate-first approach means we are committed to understanding your career goals and connecting you with opportunities that align with your aspirations, skills, and potential. Whether you're taking the next step in your career or searching for your dream opportunity, KAYGEN is more than a staffing partner-we're a community dedicated to helping you grow, succeed, and thrive. Join us and discover a place where your talent is recognized, your ambitions are supported, and your future is built alongside a team that invests in your success every step of the way.Our team of experienced staffing experts will work with you to find you the best opportunity. For more information, please visit us at www.kaygen.com.Benefits:Free Healthcare Insurance401(k) Retirement PlanFree Life InsuranceSick Time OffAchieve your Kaizen by clicking here. A unique and exclusive talent community supported by KAYGEN, that includes programs like:Mentorship ProgramCertificationsReferralsFamily and Wellness benefitsContinuous Growth and Career Development","datePosted":"2026-09-19T13:12:27.163Z","dateModified":"2026-09-19T13:12:27.163Z","hiringOrganization":{"@type":"Organization","name":"Kaygen","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Denver","addressRegion":"CO","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"b9074a3131edd0a7203300d5"},"url":"https://jobsearcher.com/jobs/b9074a3131edd0a7203300d5"}}