485 sr api developer jobs at 197 companies in Lockport, NY
1w
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Staff API Engineer
Toronto, Ontario, Canada
$88k-$132k/yr HybridFull Time
Experience building and operating developer tooling and services; working knowledge of OpenAPI and auth concepts; proficiency in Go or Python; IaC and CI/CD experience; bachelor\u000b's in CS/CE or equivalent.
OpenAPI, OAuth2, OIDC, MCP, Docusaurus, Backstage, Confluence, Apigee, ALB, Kubernetes, Envoy, Terraform, Go, Python, CI/CD, Linux, Git
2mo
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Senior API and Integration Engineer
Toronto or London
$103k-$153k/yr OnsiteFull Time
10+ YOE10+ years software engineering experience with 6+ years in APIs/integration; strong Azure, .NET/ASP.NET Core, RESTful API, security, CI/CD, and integration patterns experience.
.NET, .NET Core, ASP.NET Core, Azure Functions, Azure Service Bus, Azure SQL, Azure Key Vault, Azure API Management, Azure Application Insights, Redis, Tyk, F5, Ariel, Microsoft Dynamics CRM, JWT, OAuth, OIDC, CI/CD
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Senior API Automation Test Engineer
Toronto, Ontario, Canada
$65k-$90k/yr HybridFull Time
6+ YOE6+ years SDET experience, strong Java and automation skills, 4+ years Java-based automation (Selenium,Junit,TestNG,Maven,Cucumber),2+ years API automation with Rest Assured, SQL and CI/CD experience.
Java, TestNG, Selenium, Playwright, Rest Assured, GraphQL, COPILOT, Maven, Junit, Cucumber, SQL, CI/CD
2w
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Senior Full Stack Java / API Developer (267646)
Toronto, Ontario, Canada
HybridFull Time
Design and develop secure, scalable microservices and APIs using Java, Spring Boot, and cloud platforms; participate in security assessments and collaborate with cross-functional teams.
OpenJDK 24, Spring Boot 3.4.5, APIGEE API Gateway, OAuth2, Confluent Kafka, Azure Key Vault, Cloudbees Jenkins, Azure Cloud, PCF, Microsoft SQL, JPA, Open Api/Swagger, Postman, IntelliJ, Service Now, JIRA, Bitbucket, Confluence, Splunk, Dynatrace
1w
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Senior Java Developer (Kafka/API)
Toronto or Quebec City
$90k-$140k/yr HybridFull Time
5+ YOE5+ years Java application development experience, REST APIs, Spring, Kafka, Docker/Kubernetes, DevOps tools (Jenkins, Artifactory, BitBucket, Gradle, Ansible), and strong problem-solving and communication skills.
Java, Docker, Kubernetes, Kafka, Kafka Streams, KSQL, Jenkins, Artifactory, BitBucket, Gradle, Continuous Delivery Director, Ansible, Open API, Swagger, Java Spring Boot, Docker containers, AWS, MongoDB, Postgres, Okta, WebSphere, DB2, Maven, SonarQube, oauth2
1mo
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Senior Java Developer (API)
Toronto, Ontario, Canada
$95k-$145k/yr HybridFull Time
Extensive Java development experience, API and RESTful design, ETL and data integration, relational databases and SQL, Git, CI/CD; bachelor's degree in CS/Engineering/IT or equivalent.
Databricks, Java, RESTful, Git, Spring Boot, AWS, Azure, GCP, Kubernetes, OpenShift, Kafka, MQ, RabbitMQ, CI/CD
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Senior Java Developer (Kafka/API)
Toronto or Quebec
$90k-$140k/yr HybridFull Time
5+ YOE5+ years Java application development experience with REST APIs, Kafka, DevOps tools; strong problem-solving, experience with Kubernetes/Docker, cloud and databases; Reliability Status Clearance required; bilingual (fr) for Quebec roles.
Java, Docker, Kubernetes, Kafka, Jenkins, Artifactory, BitBucket, Gradle, Continuous Delivery Director, Ansible, WebSphere, DB2, Open API, Swagger, Spring Boot, MongoDB, Postgres, Okta, AWS, Maven, KSQL, SonarQube
1mo
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Senior API Automation Test Engineer
Toronto, Ontario, Canada
$65k-$90k/yr HybridFull Time
6+ YOE6+ years SDET/automation experience, strong Java, 4+ years automation with Java/Selenium/JUnit/TestNG/Maven/Cucumber, 2+ years Rest Assured API automation, GraphQL exposure, SQL/database testing, Copilot/GenAI experience, CI/CD knowledge.
Java, TestNG, Selenium, Playwright, Rest Assured, GraphQL, JSON, XML, SQL, JUnit, Maven, Cucumber, Copilot, CI/CD, HTTP
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Senior API Automation Test Engineer
Toronto, Ontario, Canada
$65k-$90k/yr HybridFull Time
6+ YOE6+ years SDET/automation testing experience, strong Java proficiency, 4+ years automation with Java/TestNG/Selenium/JUnit/Maven/Cucumber, 2+ years API automation with Rest Assured, SQL and DB testing, CI/CD familiarity, exposure to GraphQL and GenAI (COPILOT).
Java, TestNG, Selenium, Playwright, Rest Assured, JUnit, Maven, Cucumber, GraphQL, JSON, XML, SQL, COPILOT
3mo
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Staff Engineer, API Design & Governance
Toronto, Ontario, Canada
HybridFull Time
10+ YOE10+ years in software; expert in at least one of Java, Python, Kotlin; strong API design, GraphQL, REST/RPC; scalable distributed systems; governance and standards.
Java, Python, Kotlin, GraphQL, REST, APIs, Distributed systems, SOLID design, Observability
3w
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Sr. Java BE Developer
Toronto, Ontario, Canada
$90k-$110k/yr OnsiteFull Time
8+ YOE8+ years experience in Java backend development with Spring Boot, microservices, RESTful APIs, SQL, and Kafka; Bachelor's degree required.
Java 11, Spring, Spring Boot, RESTful APIs, Apache, Kafka, SQL, Kubernetes (K8s), Microsoft Azure
1mo
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Sr. Software Developer, Quality Platform
Toronto, Ontario, Canada
$100k-$135k/yr OnsiteFull Time
8+ YOEBachelor's or equivalent experience, 8+ years in software/platform engineering, strong backend and API experience, CI/CD and Kubernetes expertise, Infrastructure as Code, observability, and developer tooling experience.
Kubernetes, CI/CD, Infrastructure as Code, ChatGPT, Claude, Copilot
3mo
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Sr Software Engineer- Fullstack
Toronto, Ontario, Canada
RemoteFull Time
5+ YOE5+ years of software engineering experience; strong Python backend and API development; AWS serverless; IaC and observability; React/TypeScript frontend; collaboration with design/product; AI tools in SDLC.
Python, AWS, API Gateway, Lambda, DynamoDB, Terraform, GitHub Copilot, Cursor
1mo
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Software Developer Sr
Toronto or Canada
$106k-$165k/yr RemoteFull Time
5+ YOE5+ years C#/.NET experience, 2–3+ years React and TypeScript, strong SQL Server skills, Docker/CI/CD and cloud (Azure/AWS/GCP) experience, automated testing and security (OWASP, OAuth2/OIDC).
C#, .NET, .NET 6, .NET 7, .NET 8, React, TypeScript, HTML5, CSS3, SVG, JSON, REST APIs, Web APIs, LINQ, ASP.NET Core/MVC, SQL Server, Docker, CI/CD, Azure, AWS, GCP, GitHub Copilot, Codeium, Sourcegraph Cody, OpenTelemetry, Application Insights, Prometheus, Kafka, Azure Service Bus, Redis, LaunchDarkly, OWASP, OAuth2/OIDC, LLM
1mo
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Software Developer Sr
Toronto or Minneapolis or Canada or North America or Europe or Africa or Asia
$106k-$165k/yr RemoteFull Time
5+ YOE5+ years C#/.NET experience, 2+ years React/TypeScript, strong SQL Server skills, Docker and cloud (Azure/AWS/GCP) experience, CI/CD and automated testing knowledge, security fundamentals, and English proficiency.
C#, .NET, .NET 6, .NET 7, .NET 8, React, TypeScript, HTML5, CSS3, SVG, JSON, REST APIs, Web APIs, Microsoft SQL Server, LINQ, async/await, Docker, CI/CD, Microsoft Azure, AWS, GCP, OAuth2, OIDC, OpenTelemetry, Microsoft Application Insights, Prometheus, Kafka, Microsoft Azure Service Bus, Redis, LaunchDarkly, GitHub Copilot, Codeium, Sourcegraph Cody, ASP.NET Core/MVC, WCAG 2.1 AA
2mo
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Sr. Software Engineer
Toronto, Ontario, Canada
OnsiteFull Time
5+ YOEBachelor's degree or equivalent; 5+ years Java and Python, APIs, SQL/PostgreSQL, Maven/Gradle, Spring Boot; 3+ years Google Cloud Platform; experience with agentic frameworks and LLM/GenAI fundamentals.
Java, Python, ADK, LangChain, LangGraph, RESTful APIs, SQL, PostgreSQL, Maven, Gradle, J2EE, Spring Boot, Google Cloud Platform, GitHub Copilot, Gemini CLI, Dataflow, Apache Beam, Bigtable, BigQuery, Pub/Sub, GCS, Composer, Airflow, HTML, JavaScript, Angular, Bootstrap, LLM, Infrastructure as Code (IaC), Serverless, Microservices
3mo
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Sr .NET Back End Developer
Toronto, Ontario, Canada
HybridFull Time
5+ YOE5+ years backend development with .NET/.NET Core; EF; RabbitMQ; REST APIs; SQL Server; caching; SOLID; unit testing; Git.
.NET, C#, Entity Framework, RabbitMQ, RESTful APIs, SQL Server, Redis, NCache, Git, xUnit, NUnit, Moq, DDD, SOLID
1mo
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Sr. AI Engineer
Toronto or Newfoundland and Labrador or Alberta or British Columbia or North Dakota or New Brunswick or Nova Scotia or Oakville or Ottawa or Calgary
$91k-$114k/yr OnsiteFull Time
6+ YOE6+ years technical experience; strong Python and frameworks (Flask, langchain, llamaindex, FastAPI); Azure OpenAI and LLM experience; CI/CD, Docker/Kubernetes, Terraform, Azure API Management; prompt engineering and RAG/indexing expertise.
Python, Flask, langchain, llamaindex, FastAPI, Microsoft Azure OpenAI Service, Microsoft Azure API Management, Microsoft Azure DevOps, Jenkins, CircleCI, GitLab Actions, Docker, Kubernetes, Microsoft PromptFlow, Microsoft Azure AI Search, Terraform, RESTful API
1mo
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Back-End - .NET, API, AI Ready
Toronto, Ontario, Canada
$118k-$152k/yr OnsiteFull Time
5+ YOE5+ years software engineering experience with .NET/ASP.NET Core, REST API development, React, Microsoft SQL Server, Docker, CI/CD, and API security (JWT/OAuth2); strong collaboration and problem-solving skills.
.NET, ASP.NET Core, React, Microsoft SQL Server, Dapper, Entity Framework Core, JWT, OAuth2, Docker, CI/CD, Tailwind CSS, shadcn/ui, Microsoft Azure, Snowflake
1w
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Backend Engineer – Python (API & Platform Engineering)
Toronto, Ontario, Canada
$55-$58/hr OnsiteContract
5+ YOE5+ years backend experience, strong Python, REST/OpenAPI, SQL/NoSQL, cloud (AWS/Azure/GCP), Git, CI/CD; BS/MS in CS or related.
Python, JSON, OpenAPI, SQL, NoSQL, AWS, Azure, GCP, Git, Docker, Kubernetes