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1,612 api engineer jobs at 792 companies in Fairfield, CT

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Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
Help us #BeatIndeed & #BeatLinkedIn
3d
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Senior Software Engineer – API Infrastructure
New York City, New York, United States
$160k-$240k/yr OnsiteFull Time
Bloomberg
Bloomberg: Delivers financial data, news, and software to global markets.
4+ YOE4+ years software engineering experience with TypeScript, Python, Java or similar; strong system design, testing, operational ownership, cross-team collaboration, and ownership of features through production.
TypeScript, Python, Java, OpenAPI, TypeSpec, JSON Schema, GraphQL, REST, React, Monaco editor
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3d
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API Developer/Data Engineer Managing Consultant-Fraud/AI
McLean or New York City or Arlington or United States
$130k-$216k/yr HybridFull Time
Guidehouse
Guidehouse: Provides management and technology consulting services to diverse organizations.
5+ YOEUS citizen able to obtain Public Trust,5+ years in data engineering/integration, proficiency in Python, Java/JS, .NET (C#), RESTful APIs, XML, SQL/SQL Server, GCP, data formats (JSON, Parquet), and experience leading technical teams.
Python, Java, JS, C#, .NET, RESTful API, XML, SQL Server, SQL, CSV, TXT, JSON, Parquet, GCP, Apigee, Kong, Azure API Management, AWS API Gateway, LexisNexis, Oracle Mantas, Actimize, Fircosoft, Oracle Mantas, World-Check, Dow Jones, Chainalysis, Elliptic, TRM Labs
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2w
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Principal Identity and API Architect
New York City or London
$175k-$250k/yr OnsiteFull Time
TripleLift
TripleLift: Programmatic advertising platform for high-quality digital ad experiences.
8+ YOEDesign and own end-to-end identity and API architecture including Auth0, OAuth/OIDC, ReBAC/OpenFGA, API gateway design, and AWS identity infrastructure; 8+ years engineering/architecture experience with 4+ years focused on identity/IAM/API security.
Auth0, Auth0 Management API, Actions/Rules, OpenFGA, SpiceDB, Ory Keto, Traefik, Kong, AWS API Gateway, AWS IAM, Cognito, Secrets Manager, KMS, STS, Lambda, OAuth 2.0, OpenID Connect (OIDC), SAML 2.0, JWT, JWKS, PKCE, mTLS, Go, Java, Python
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3mo
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Integrations Support Engineer 5 - Ads Conversion API
New York or Los Gatos
$270k-$410k/yr OnsiteFull Time
Netflix
NetflixNASDAQ: NFLX: Global video streaming and media production service.
Experience with ad tech, Conversions API, data integrations, SQL, Python/Java, REST APIs, and partner-facing support.
SQL, Python, Java, REST API, Postman, curl, Cloud Computing
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23h
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Senior Software Engineer, API Platform
New York, New York, United States
$160k-$200k/yr HybridFull Time
Nayya
Nayya: AI platform optimizing employee health and wealth benefits.
6+ YOE6+ years building backend services and public/partner-facing APIs; deep API design and distributed systems expertise; production experience with Python, Go, Node, Typescript, or Ruby on Rails on AWS; mentoring and on-call experience.
Python, Go, Node, Typescript, Ruby on Rails, AWS, LangChain, LlamaIndex, LangGraph
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3w
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Head of Enterprise API Platform
New York or United States
$179k-$294k/yr RemoteFull Time
Guardian Life
Guardian Life: Provides life, disability, dental, and vision insurance products.
10+ YOE5+ Mgmt10+ years in software engineering or platform engineering, 5+ years leading teams, Bachelor's in CS/Engineering or equivalent, expertise in API design, microservices, security, integration patterns, and experience modernizing legacy systems.
AWS, Azure
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1mo
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Senior Software Engineer | API
New York, New York, United States
$140k-$220k/yr HybridFull Time
DeepL
DeepL: AI-powered language translation and writing assistance platform.
Backend/API engineering focus with REST, distributed systems, and developer experience.
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2w
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Software Engineer, Developer API
New York City or San Francisco or United States or Canada or United Kingdom
$168k-$330k/yr HybridFull Time
Ramp
Ramp: Financial operations platform for corporate cards and spend management.
5+ YOE5+ years backend engineering, experience building APIs/platforms, hands-on with Python, Temporal, and Postgres, familiarity with AI coding agents, strong ownership and developer-experience focus.
Python, Temporal, Postgres
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1mo
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Platform Engineer- GraphQL/API
Dublin or San Jose or New York City or Shanghai
HybridFull Time
eBay
eBayNASDAQ: EBAY: Global online marketplace for buying and selling diverse products.
3+ YOE3+ years software engineering experience; strong Java and Spring Boot skills; GraphQL and API design experience; CI/CD (Maven/Jenkins); Kubernetes and cloud-native deployments; focus on reliability, scalability, and developer experience.
Java, Spring Boot, GraphQL, REST, CI/CD, Maven, Jenkins, Kubernetes
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3mo
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Integrations Support Engineer 5 - Ads Conversion API
New York City or Los Gatos
$270k-$410k/yr OnsiteFull Time
Netflix
NetflixNASDAQ: NFLX: Provider of global streaming entertainment and video content.
Deep ad tech experience with Conversions API (CAPI) platforms, proficiency in Java or Python and advanced SQL, API debugging (curl/Postman), cloud platform knowledge, code debugging, and strong stakeholder communication.
Conversions API (CAPI), Google Tag Manager, SQL, Python, Java, curl, Postman, ETL, REST APIs
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3mo
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Senior Lead Software Engineer - API Specialist
Jersey City, New Jersey, United States
$171k-$260k/yr OnsiteFull Time
JPMorgan Chase
JPMorgan ChaseNYSE: JPM: Global financial services firm providing banking and investment solutions.
6+ YOE6+ years software engineering; API security, API management; REST; Core Java/Spring; cloud (AWS); SQL/NoSQL; strong collaboration and communication.
Java, J2EE, Spring, Spring Boot, Spring Cloud, OAuth 2.0, JWT, JWS, JWE, OPA, ForgeRock, Okta, OIDC, SAML, Kong, Apigee, MuleSoft, AWS API Gateway, Azure API Management, WSO2, REST, SQL, NoSQL, MySQL, Postgres, Oracle, DynamoDB, MongoDB, SONAR, Checkstyle, PMD, Terraform, CloudFormation, AWS EC2, AWS Lambda, AWS KMS, AWS ECS, AWS EKS, AWS S3, SQS, EventBridge, PostgreSQL
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1mo
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Software Engineer, API SDK
San Francisco or Seattle or New York City
$293k-$385k/yr HybridFull Time
OpenAI
OpenAI: Develops artificial intelligence models and generative AI software services.
7+ YOE7+ years of professional engineering experience; experience building SDKs; design and implement SDKs for multiple languages; collaborate across teams.
Python, Node.js, Golang, Java, Ruby, SDK generation
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1mo
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Senior Software Engineer - Customer Integrations (API)
United States or New York City or Dallas or Austin or Houston or Chicago or Nashville or Miami or Atlanta
$140k-$160k/yr RemoteFull Time
TheGuarantors
TheGuarantors: Provides lease guarantees and security deposit alternatives for rentals.
3+ YOE3+ years building backend services with Go/Java/Python/C#; strong API design, SQL/PostgreSQL, cloud (AWS/Azure/GCP/OCI) and Terraform experience; professional software engineering experience and strong communication/system design skills.
Go, Java, Python, C#, SQL, PostgreSQL, AWS, Azure, GCP, OCI, Terraform
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3w
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Software Engineer, External API Security
New York, New York, United States
$147k-$211k/yr OnsiteFull Time
Google
GoogleNASDAQ: GOOGL: Provides online search, advertising, cloud computing, and consumer electronics.
2+ YOEBachelor's degree or equivalent; 2 years software development; 2 years building software for security (vulnerability analysis, IAM); proficiency with secure coding and API security; preferred experience with Go, Java, Python and agent-based AI systems.
Go, Java, Python
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1mo
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Member of Technical Staff (Software Engineer, API Platform)
San Francisco or New York City
$220k-$405k/yr OnsiteFull Time
Perplexity
Perplexity: AI-powered search engine providing conversational answers with citations.
5+ YOE5+ years backend engineering with Python, Go, or Rust; strong high-traffic API design, AWS and Kubernetes experience, CI/CD and DevOps fluency; experience with AI APIs a plus.
Python, Go, Rust, AWS, Kubernetes, CI/CD
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3mo
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Staff Software Engineer — Search Platform, API & Infrastructure
Eagan or Frisco or Brooklyn or Toronto or Ann Arbor
$118k-$253k/yr HybridFull Time
Thomson Reuters
Thomson ReutersNASDAQ: TRI: Provides professional software, data, and news services globally.
8+ YOE8+ years of software engineering; strong AWS cloud infra; OpenSearch/Vespa/Elasticsearch operations; Python; security and multi-tenant SaaS API; IaC with Terraform and/or AWS CDK; leading cross-functional projects.
AWS, Terraform, AWS CDK, OpenSearch, Vespa, Elasticsearch, DynamoDB, MSK, Python, IAM, KMS
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1w
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Integrations Engineer
New York City, New York, United States
$135k-$155k/yr OnsiteFull Time
Coast
Coast: Smart fuel cards and expense management for commercial fleets.
4+ YOE4+ years total experience (≥3 years engineering); strong backend/API design, data modeling, OAuth/API key auth, AWS; experience integrating ERPs/telematics/accounting tools; strong communication and problem-solving.
AWS, Oracle, Samsara, NetSuite, QuickBooks, OAuth, API keys, API
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3w
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Backend Engineer (Python/API) - hybrid NYC - Blueflame AI
New York City, New York, United States
$119k-$207k/yr HybridFull Time
Datasite
Datasite: SaaS platform for managing mergers, acquisitions, and strategic projects.
5+ YOE5+ years software engineering experience, strong Python proficiency, RESTful API design, distributed systems/asynchronous programming familiarity, system design experience, MongoDB/Redis experience, based in or willing to relocate to NYC and able to work onsite 3 days/week.
Python, MongoDB, Redis, LLMs
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6d
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Senior Software Engineer - API Platform & Client Tooling
Bellevue or Livingston or New York City or San Francisco or Sunnyvale
$153k-$204k/yr OnsiteFull Time
CoreWeave
CoreWeaveNASDAQ: CRWV: Cloud platform providing GPU-accelerated infrastructure for AI workloads.
Production Go experience, API design and versioning, client tooling/SDK/CLI or provider work, code-generation or compiler/tooling experience preferred, cross-team collaboration and mentorship.
Go, gRPC, protocol buffers, Buf, ConnectRPC, Terraform Plugin Framework, Cobra, CWIC
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1mo
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X Developer Platform – Forward Deployed Engineer, X API
New York or Palo Alto
$180k-$440k/yr HybridFull Time
xAI
xAI: Develops advanced artificial intelligence systems to understand the universe.
5+ YOE5+ years in a customer-facing technical role; strong DevEx focus; expert in API-driven development; proficient in multiple languages; excellent communication and project management.
Python, JavaScript, TypeScript, Java, Rust, Scala
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