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1,954 api developer jobs at 884 companies in Stamford, CT

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API Developer (US)
New York City or Austin or Dallas or Chicago or Seattle
$90k-$150k/yr HybridFull Time
EdgeQ Technologies Private Limited
EdgeQ Technologies Private Limited: A private U.S. staffing and recruitment firm connecting IT, healthcare, and other professionals with employers.
3+ YOEBachelor's degree in Computer Science or related field; 3-10 years API development experience; proficiency in Python, Java, JavaScript/Node.js, or C#; REST APIs, OAuth 2.0, JWT, SQL, Agile/Scrum, Git, Postman.
REST, GraphQL, Swagger, OpenAPI, OAuth 2.0, JWT, SQL, Git, Postman, Docker, Kubernetes, AWS, Microsoft Azure, Google Cloud
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1mo
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AVP, API Engineer
Alpharetta or Stamford or Charlotte +1 more
$115k-$200k/yr RemoteFull Time
Synchrony
SynchronyNYSE: SYF: Public U.S. consumer financial services providing credit cards, financing, and banking products to consumers and businesses.
8+ YOEBachelor's degree and 8+ years of software engineering experience, or high school diploma/GED and 10 years; 6+ years application development, Spring Boot/Cloud, architecture, cloud, microservices, and technical leadership.
SAFe, PCF, Pivotal Cloud Foundry, J2EE, Spring Java, Spring Boot, Spring Cloud, REST, Jenkins, Bitbucket, uDeploy, SOAP, Splunk, MySQL, SQL, Gemfire, JSON, XML, GitHub Copilot
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3w
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Associate - API Sales Engineer
New York City, New York, United States
$90k-$110k/yr HybridFull Time
Capital Markets Gateway
Capital Markets Gateway: Private fintech providing ECM data and workflow tools to buy-side and sell-side financial firms.
3+ YOERequires 3+ years in sales or solutions engineering, Python, Excel, SQL, REST and GraphQL API knowledge, technical client communication, and a bachelor's degree in finance, economics, computer science, engineering, or related field.
Python, Microsoft Excel, SQL, REST, GraphQL, CRM
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1mo
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Software Engineer, API Frontiers
New York City or San Francisco
$266k-$445k/yr HybridFull Time
OpenAI
OpenAI: AI research and deployment focused on beneficial AGI.
5+ YOE5+ years building and operating backend services or developer-facing APIs, with distributed systems, concurrency, asynchronous execution, observability, profiling, and cross-functional collaboration experience.
Responses API, Rust, WebSockets
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3mo
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Full Stack Developer (.NET API) - Senior Software Engineer
Stamford, Connecticut, United States
OnsiteFull Time
Information Services Group
Information Services GroupNasdaq: III: Global AI-centered technology research and advisory firm serving commercial and public-sector clients.
6+ YOEBachelor's in computer science or related field, 6+ years full-stack experience with .NET Core API, Angular and SQL Server, strong C#/Web API and front-end (HTML/CSS/JavaScript) skills, REST API experience, communication and leadership abilities.
Angular, .NET Core, SQL Server, C#, Web API, HTML, CSS, JavaScript, Microsoft Azure, Git
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1mo
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Sr. Software Engineer – API & Auth Platform
New York City, New York, United States
$170k-$195k/yr HybridFull Time
Betterment
Betterment: Private U.S. fintech providing automated investing, savings, retirement, and financial-wellness services to consumers, advisors, and small businesses.
Experience building shared API platforms (ideally GraphQL), modern auth patterns (OAuth 2.0, OIDC, passkeys), production operations, fullstack development with server-side languages, and collaboration across teams.
GraphQL, OAuth 2.0, OIDC, Ruby, Java, TypeScript, C#, Python
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1w
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FrontEnd Developer React Tailwind CSS API Integrations
Woodcliff Lake, New Jersey, United States
$30-$48/hr OnsiteFull Time
CareSphere
CareSphere: Private Pennsylvania home care agency providing non-medical in-home support for children, seniors, veterans, and adults with disabilities.
Strong English communication; React, Tailwind CSS, JavaScript/TypeScript, RESTful API integration, Git, Vite; must live within commuting distance and start immediately.
React, Tailwind CSS, JavaScript, TypeScript, REST API, Vite, Git
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Senior Software Engineer, API Systems
New York City, New York, United States
$125k-$180k/yr OnsiteFull Time
Book of the Month
Book of the Month: Private U.S. book subscription selecting and shipping new fiction to members each month.
6+ YOE6+ years production code experience; Node.js, TypeScript, relational databases (MySQL/PostgreSQL), REST APIs, test suites, Redis/Kafka/SQS; solution-oriented, ownership, teamwork.
Node.js, TypeScript, MySQL, PostgreSQL, Redis, Kafka, SQS
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2d
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​Senior Engineer, Backend: Cloud & API Development
Hoboken or United States
$120k-$180k/yr RemoteFull Time
Quantum Computing Inc.
Quantum Computing Inc.The Nasdaq Stock Market LLC: QUBT: Public U.S. photonics serving commercial and government customers with room-temperature quantum machines and photonic systems.
4+ YOE4+ years backend software engineering; expert Golang and Python; message queuing (RabbitMQ, Kafka, NATS); API security (OAuth2, JWT, OWASP); SQL/NoSQL database design; legal authorization to work in U.S.
Golang, Python, RabbitMQ, Kafka, NATS, OAuth2, JWT, SQL, NoSQL, gRPC, Protocol Buffers, GitLab CI, GitHub Actions, Kubernetes, Docker, PostgreSQL, Linux, Git, MongoDB, FastAPI
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2w
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Senior Staff Software Engineer, Gusto Agent & Partner Experiences (API)
Denver or New York City or San Francisco
$213k-$278k/yr HybridFull Time
Gusto
Gusto: Gusto is a payroll, benefits, and human-resources software platform serving small and medium-sized businesses.
12+ YOE12+ years professional software development; Ruby and Rails expert; experience designing platforms and public APIs; mentoring and raising technical bar; effective communication; hybrid work in Denver, SF, or NYC.
Ruby on Rails, GraphQL
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Senior Software Engineer - Media API Platform
New York City, New York, United States
$160k-$240k/yr OnsiteFull Time
Bloomberg
Bloomberg: Global financial software, data, and media.
5+ YOE5+ years building and running backend services in production; expertise in JavaScript/TypeScript, Java, Kotlin, or Python; distributed systems knowledge; AI-assisted engineering tools; debugging production issues; strong collaboration and mentoring skills.
TypeScript, Node, Java, Kotlin, Python, GraphQL, Apollo Federation, MySQL, PostgreSQL, OAuth, JWT, AWS, Docker
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2mo
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Developer Relations
San Francisco or New York City
$290k-$435k/yr HybridFull Time
Anthropic
Anthropic: AI research developing safe and steerable AI systems.
5+ YOE5+ years in developer relations, developer experience, or technical product/engineering roles; AI/ML and API knowledge; production-quality coding, technical content, collaboration, and responsible AI commitment.
Claude Code, Claude Tag, API, GPT-3
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2mo
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Software Engineer, Developer Platform
San Francisco or New York City
$213k-$320k/yr HybridFull Time
Notion
Notion: Collaborative workspace for notes, projects, and AI tools.
7+ YOERequires 7+ years shipping production software, end-to-end feature ownership, and TypeScript fluency across backend and frontend. Developer tools, APIs, SDKs, and AI tooling experience are advantageous.
TypeScript, APIs, MCP, SDKs, LLM
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3mo
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Software Development Engineer
White Plains, New York, United States
$85k-$110k/yr OnsiteFull Time
Berkley Healthcare
Berkley Healthcare: A private insurance underwriting business providing medical professional, general, managed-care liability and financial-lines coverage to healthcare providers.
3+ YOE3+ years .NET development experience; full-stack web application development; proficiency in C#, SQL, .NET, JavaScript; RESTful API development; Agile/Scrum; Bachelor's degree in Computer Science or related field.
C#, SQL, .NET, ASP.NET, .NET Core, JavaScript, HTML 5, Angular, Node, React, Rabbit MQ, MS SQL, SignalR, Git, Bitbucket, Jira, Confluence, Web API, Azure, AWS, Kafka
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1mo
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Partner Engineer
New York City or San Francisco or United States
$155k-$200k/yr HybridFull Time
Check
Check: Private payroll infrastructure helping software platforms embed payroll, payments, tax filing, and benefits for business customers.
2+ YOERequires 2+ years of software engineering experience, production coding, RESTful API integration, AI development, technical infrastructure, strong communication, and problem-solving skills.
RESTful APIs, APIs, LLMs, AI agents
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2mo
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Mulesoft Developer
Albany or Arlington or Atlanta or Austin or Beaverton or Bentonville or Boston or Carmel or Charlotte or Chicago or Cincinnati or Cleveland or Columbus or Culver City or Denver or Des Moines or Detroit or Hartford or Houston or Irving or Kirkland or Miami or Milwaukee or Minneapolis or Morristown or Mountain View or Nashville or New York City or Oklahoma City or Overland Park or Philadelphia or Pittsburgh or Raleigh or Redmond or Sacramento or San Diego or San Francisco or Scottsdale or Seattle or St. Louis or St. Petersburg or Walnut Creek or United States +1 more
$54k-$196k/yr OnsiteFull Time
Accenture
AccentureNYSE: ACN: Global professional services delivering 360° value.
3+ YOERequires 3+ years software development, 2+ years API development and Git/Agile/testing, 1+ year MuleSoft development, MuleSoft Developer Level 1, and a bachelor's degree or equivalent experience.
Anypoint Platform, Anypoint Studio, Mule Runtime, DataWeave, MUnit, Git, SOAP, REST, XML, JSON, YAML, Anypoint MQ, API Manager, Anypoint Exchange, CloudHub, Salesforce, SAP, Workday, Oracle Cloud Applications, ServiceNow, CI/CD, AWS, Azure, Flex Gateway, Model Context Protocol (MCP), GenAI, HL7, FHIR, Boomi, Informatica, SnapLogic, Workato
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2mo
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Developer Experience Engineer
London or New York City
RemoteFull Time
ElevenLabs
ElevenLabs: AI audio research and voice synthesis software.
Full-stack engineering skills, API design expertise, open-source or SDK experience, technical content writing ability, and strong communication skills for triaging technical issues.
SDKs, MCP, API
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3mo
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Founding Backend Engineer
New York City, New York, United States
OnsiteFull Time
Hera
Hera: Private Medicare-covered care-management coordinating care for older adults and their families.
Experienced backend engineer with strong systems design, cloud and database experience, API and SDK development, security/compliance awareness, and ownership in early-stage environments.
AWS, SQL, APIs, SDKs
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