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API Developer (Node.js + Express) - Contract

Kaygen Inc.

  • Remote, KY
  • 19 days ago
  • Remote
  • $40–$50 Per Hour

Highlights

Responsibilities Backend 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. Required Skills 4+ 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 migrations.

Numbers & Facts

LocationRemote, KY (
Remote)
IndustryComputer/IT Services
Salary$40–$50 Per Hour
Company Size100 to 499 employees
Year Founded2003
Websitehttp://www.kaygen.com

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 4/30/27
Location: Remote

Responsibilities
  • Backend 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 notifications
  • Implement and maintain the business rules and decision logic that drive specialty recommendations based on patient and referral data
  • Design 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 environment
  • Partner with front-end, integration, and QA teams to deliver end-to-end features
  • Support 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 designs
Required Skills
  • 4+ 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 migrations
  • Experience 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 experience
  • Familiarity with referral management, specialty recommendation, or prior authorization workflows Exposure to healthcare data standards (HL7, FHIR, or X12 275/278) is a plus
  • Prior experience in a consulting or client-facing delivery environment
Rate: $40 - 50/hour


At 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 Insurance
  • 401(k) Retirement Plan
  • Free Life Insurance
  • Sick Time Off
Achieve your Kaizen by clicking here. A unique and exclusive talent community supported by KAYGEN, that includes programs like:
  • Mentorship Program
  • Certifications
  • Referrals
  • Family and Wellness benefits
  • Continuous Growth and Career Development

Benefits

Paid Sick Days, Professional Development, 401K, Employee Referral Program, Flexible Spending Accounts, Employee Events, Life Insurance, Merchandise Discounts

About Company

Kaygen, an award-winning technology consulting and talent firm, assists organizations to achieve digital transformation. From structuring data to the Cloud and visualization, Kaygen leads the digital transformation of global clients.

Kaygen, from the Japanese word, kaizen, for continuous improvement, signifies how we continuously seek to bring expert tech talent to our client engagements to create a sustainable competitive advantage. However, there is more. Our company is diverse, and minority woman owned and operated by expert data technologists who have conceived and developed the very strategic technology initiatives that we now engage in for our clients with our talent.

Our core belief in diversity, complemented by the principles of kaizen, ensures we bring the best expert data talent to work transparently, collaboratively, and with the flexibility to ensure client success.

Visit http://www.kaygen.com/ for a solutions overview.

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