1,091 sr api developer jobs at 526 companies in Elizabeth, NJ
2w
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Sr Java API Developer - New York
New York, New York, United States
$40k-$140k/yr OnsiteFull Time
Photon: A technology employer building secure, scalable, and maintainable backend and API solutions.
5+ YOE5+ years Java backend experience, proficiency with Java 11/17, Spring ecosystem, RESTful APIs, relational and NoSQL databases, API security, CI/CD, and testing frameworks.
Java 11, Java 17, Spring Boot, Spring MVC, Spring Data JPA, Spring Security, Hibernate, REST, OpenAPI/Swagger, JSON, GraphQL, PostgreSQL, MySQL, Oracle, MongoDB, Cassandra, Apache Kafka, RabbitMQ, Maven, Gradle, JUnit, Mockito, REST Assured, Jenkins, GitHub Actions, GitLab CI, Microsoft Azure DevOps, Docker, Kubernetes, Git, Redis, Hazelcast, Prometheus, Grafana, ELK Stack, Splunk
2mo
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Senior API Engineer - Advisor I
Alpharetta or Omaha or Berkeley Heights
$90k-$158k/yr OnsiteFull Time
8+ YOE8+ years in Java/J2EE engineering, RESTful APIs, Spring, Azure, cloud–native services, CI/CD, DevSecOps, and cloud platforms; experience with relational/non-relational databases and messaging systems.
Java, J2EE, Spring, Spring Boot, REST API, Azure, OpenShift, PCF, Kafka, MQ, ESB, SQL, NoSQL, Splunk, CI/CD, DevSecOps
2mo
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Sr. Software Engineer (Hybrid)
Hartford or Charlotte or Short Hills
$123k-$157k/yr HybridFull Time
5+ YOE5+ years of experience designing and developing complex applications; Bachelor's preferred in CS/Engineering; strong .NET/C#, API, SQL; cloud, Azure, DevOps, and leadership skills.
C#, .NET, API development, SQL, Azure, Container Apps, API Management, App Gateway, Key Vault, App Services, Logic Apps, SQL MI, Infrastructure-as-Code, Bicep, ARM, Terraform, Angular, SAFe
1mo
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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
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
2mo
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Senior Software Engineer | API
New York, New York, United States
$140k-$220k/yr HybridFull Time
Backend/API engineering focus with REST, distributed systems, and developer experience.
2d
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Member of Technical Staff (Software Engineer, Backend API)
London or Serbia or Berlin or New York City
$200k-$350k/yr OnsiteFull Time
Experience designing and operating distributed high-load systems, cloud infrastructure, Kubernetes, CI/CD, and either API product engineering or platform operations; strong autonomy and product sense required.
Go, Rust, Python, MCP, Kubernetes, CI/CD
1w
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Python API Engineer
Fort Mill or Charlotte or New York City or San Diego or Austin
$106k-$177k/yr OnsiteFull Time
7+ YOE7+ years software engineering experience with Python, REST APIs, AWS (Lambda, API Gateway, CloudWatch, IAM, S3), Terraform, CI/CD (Jenkins/GitHub Actions), and production support; BS in CS or related (MS preferred).
Python, AWS Lambda, Amazon API Gateway, CloudWatch, IAM, S3, Terraform, Jenkins, GitHub Actions, SQL, AWS SAM, Serverless Framework, EventBridge, SNS, SQS, Dynatrace, Datadog, OpenTelemetry, Git
3w
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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
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
1w
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Full Stack Developer (.NET API) - Senior Software Engineer
Stamford, Connecticut, United States
OnsiteFull Time
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
2mo
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Senior Software Engineer - MDM / RDM & API Development
Newark, New Jersey, United States
$104k-$172k/yr HybridFull Time
Senior software engineer with experience in MDM/RDM, API development, Python/Spark/Node.js, and Agile practices.
Python, Spark, Node.js, NoSQL, Relational Databases, SQS, Kinesis, REST, JSON, SOAP, XML, JDBC, MySQL, Git, Jenkins, AWS, CloudWatch, CodeDeploy
1w
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Sr. Engineer, Software Development
New York City or Birmingham or Miami or Tampa or Blue Ash or Cincinnati or Los Angeles or San Francisco
$121k-$173k/yr HybridFull Time
5+ YOE5+ years software engineering experience with secure API/microservice development, cloud (Azure) and observability; 1+ year technical leadership; fintech or BaaS experience preferred.
C#, .NET, SQL, APIM, Azure SQL, Cosmos DB, Key Vault, Service Bus, Event Hubs, Datadog, Grafana, Git, OAuth2, Open API
1mo
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Full Stack Software Engineer, API Experience
New York City, New York, United States
$293k-$385k/yr OnsiteFull Time
5+ YOE5+ years engineering experience; strong TypeScript and React; proficiency in one or more backend languages (Python, Go, Rust, TypeScript); experience building production APIs, services, SDKs, and developer tooling.
TypeScript, React, Python, Go, Rust, SDKs
1w
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Sr Software Engineer
New York, New York, United States
$149k-$199k/yr HybridFull Time
5+ YOE5+ years software development experience with functional Scala, AWS and Kubernetes; strong API, distributed systems, observability, and CI/CD skills.
Scala, ZIO, Cats, Cats Effect, RX Java, Kotlin, Clojure, Lisp, Haskell, OCaml, Elm, Typescript, AWS, Cloudformation, Terraform, Kubernetes, Docker, Istio, Spinnaker, Datadog, Git, Jira
1mo
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Principal Identity and API Architect
London or New York
€90k-€130k/yr OnsiteFull Time
8+ YOE8+ years software engineering/platform architecture experience (4+ years focused on identity/IAM/API security). Hands-on Auth0, OpenFGA/ReBAC, OAuth2/OIDC/SAML, AWS identity services, API gateway patterns, and backend development in Go/Java/Python.
Auth0, Okta, OpenFGA, SpiceDB, Ory Keto, Traefik, Kong, AWS API Gateway, IAM, Cognito, Secrets Manager, KMS, STS, Lambda, OAuth 2.0, OpenID Connect (OIDC), SAML 2.0, JWT, JWKS, Go, Java, Python
1w
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Director, eCommerce Syndicated API Platforms
Stamford or St. Louis or Greenwood Village
HybridFull Time
10+ YOE3+ MgmtBachelor's degree or equivalent,10+ years in technical program delivery or API platforms,9+ years partner enablement,API strategy and integrations,leadership in launch planning and stakeholder alignment,strong API and developer experience skills.
REST APIs, API gateway, cloud-based platforms
1mo
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Sr Software Engineer
New York, New York, United States
$400k-$500k/yr OnsiteFull Time
10+ YOE10+ years modern C++ low-latency development, expertise in cache coherency, memory management, multithreading and lock-free queues, TCP/UDP and latency measurement, API/protocol design; Git/GitLab and Wireshark proficiency; Solarflare and FIX experience a plus.
C++, Git, GitLab, Wireshark, Solarflare, TCP, UDP, FIX
3d
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Sr AI Engineer
New York City, New York, United States
$150k-$215k/yr OnsiteFull Time
6+ YOE6+ years building and operationalizing GenAI solutions; mastery of agent orchestration frameworks; expert Python; LLM APIs, prompt engineering, vector databases, RAG, APIs, Docker, and Kubernetes.
LangChain, LangGraph, CrewAI, Microsoft AutoGen, OpenAI, Anthropic, AWS Bedrock, Pinecone, Weaviate, Python, FastAPI, Node.js, Go, Docker, Kubernetes
4w
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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
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
3d
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Sr AI Engineer
New York City, New York, United States
$150k-$215k/yr OnsiteFull Time
6+ YOE6+ years building and operationalizing GenAI solutions; mastery of agent orchestration frameworks; expert Python; LLM APIs, prompt engineering, vector databases, RAG, APIs, Docker, Kubernetes, and strong communication.
LangChain, LangGraph, CrewAI, Microsoft AutoGen, OpenAI, Anthropic, AWS Bedrock, Pinecone, Weaviate, Python, FastAPI, Node.js, Go, Docker, Kubernetes
1mo
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SR UI Developer
New York City, New York, United States
OnsiteFull Time
Experience building type-safe React components with TypeScript; proficiency in HTML5, Tailwind CSS, Next.js or Remix, Node.js APIs, responsive design, WCAG accessibility, performance optimization, and automated testing.
React, TypeScript, HTML5, Tailwind CSS, Next.js, Remix, Node.js, WCAG
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