36 sr api developer jobs at 18 companies in Concord, NH
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Sr. Staff Software Engineer
Lowell, Massachusetts, United States
$146k-$209k/yr HybridFull Time
10+ YOE10+ years building enterprise Java-based web applications, expertise with cloud-native architectures, AI/LLM integrations, microservices, REST APIs, and strong testing and CI/CD practices.
Java, J2EE, Spring Boot, Spring Framework, Hibernate/JPA, React, JavaScript, HTML5, CSS3, REST APIs, Microservices, SQL, GitHub Copilot, ChatGPT, Cursor, Claude, LangGraph, OpenAI Agents SDK, CrewAI, AutoGen, OpenAI, Anthropic, Google Gemini, Model Context Protocol (MCP), AWS, Microsoft Azure, Google Cloud Platform, Kubernetes, Docker, OpenShift, Terraform, CloudFormation, ARM Templates, GitHub Actions, Jenkins, Azure DevOps, GitLab CI, Datadog, Grafana, Prometheus, Splunk, OpenTelemetry, Bash, Python, PowerShell
1mo
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Senior Software Engineer
Andover or Boston or New York or Chicago or Menlo Park or Manchester or London or Tokyo
$140k/yr OnsiteFull Time
6+ YOE6+ years building production applications; experience with JavaScript/Node.js and/or Python, PostgreSQL/MySQL, AWS, API integrations, full-stack development, modern/AI-assisted dev tools; authorized to work in the US.
Javascript, Node.js, Python, PostgreSQL, MySQL, AWS, AI-assisted development tools, NetSuite APIs, APIs
1mo
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Sr. Software Engineer – Distributed Systems & Platform Integration
Salem, New Hampshire, United States
OnsiteFull Time
Experience with C++ in production, API design (gRPC/REST), distributed systems concepts, Linux development, and ability to design cross-system integrations.
C++, gRPC, REST, Rust, Protocol Buffers, Python, GitHub Copilot, Qt, Linux
1w
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Principal Software Engineer/Developer
Merrimack, New Hampshire, United States
OnsiteFull Time
3+ YOEDesign, develop, test, and maintain enterprise Java/Spring Boot applications and APIs; experience with cloud, CI/CD, observability, and mentoring; Bachelor's or Master's in related field with relevant experience.
Java, Spring Boot, Angular, Node JS, JIRA, SQL, NoSQL, Snowflake, CloudFormation, Jenkins, Shell Scripting, Datadog, Splunk, Git, uDeploy, Sonar, RESTful web services
3d
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Senior Software Integration Engineer
Wilmington, Massachusetts, United States
OnsiteFull Time
5+ YOEBachelor's or master's degree in computer science, computer engineering, or related field; 5–7 years of C/C++ programming, 3–5 years of Agile development, API and SaaS integration experience, and prior data acquisition systems experience.
C, C++, Azure, AWS, Google Cloud, Git, Atlassian, Salesforce, Microsoft Dynamics 365, HubSpot, NetSuite, SAP, ServiceNow, MuleSoft, Boomi, Azure Logic Apps, Azure Integration Services, Workato, Zapier Enterprise, Kafka, RabbitMQ, Azure Service Bus, AWS SQS, Docker, Kubernetes, OAuth2, OpenID Connect, SAML, API
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Senior Software Engineer, iOS (On-site - Acton, MA)
Acton, Massachusetts, United States
$128k-$192k/yr OnsiteFull Time
5+ YOEBachelor's degree,5+ years software development with 3+ years iOS,proficiency in Swift,CI/CD and Git,knowledge of Bluetooth/BLE and cloud APIs,experience with medical device regulations preferred.
Swift, TCA (The Composable Architecture Framework), Kotlin Multiplatform, Bluetooth, BLE, APIs, REST, OAuth 2.0, JSON, CI/CD, Git
1w
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Staff Software Engineer - Algorithms
Wilmington, Massachusetts, United States
$149k-$205k/yr HybridFull Time
8+ YOEBachelor's or Master's in CS or related, 8+ years professional C#/.NET development, strong algorithms and distributed systems experience, debugging and SQL skills, Windows/Linux development.
C#, .NET, .Net Core, Rabbit MQ, Open API, Kubernetes, Git, SQL Server, PL/SQL, Windows, Linux
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Senior Java Developer (Irving, TX, US)
Irving or Westlake or Merrimack
$86k-$127k/yr OnsiteFull Time
10+ YOE10+ years Java/J2EE experience with Spring/Spring Boot, API design, microservices, cloud (Docker, Kubernetes, AWS/Azure), CI/CD tools (GitHub, Jenkins, uDeploy), relational DB (DB2/Oracle), JPA/Hibernate, strong communication and leadership skills.
Java, J2EE, Spring, Spring Boot, Docker, Kubernetes, AWS, Azure, GitHub, GIT, Jenkins, uDeploy, Stash, JPA2, Hibernate, DB2, Oracle, PL/SQL, SQL, Sonar, HP Operations Orchestration, HP Service Manager, ServiceNow, REST API
2mo
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Senior Engineer, Software Infrastructure
Wilmington, Massachusetts, United States
$110k-$152k/yr OnsiteFull Time
Experience in web frontend/backEnd, React, TypeScript, Node.js REST APIs, Backstage, Git/GitHub, Docker, cloud (AWS/Azure/GCP), testing (Jest/Playwright/Cypress), CI/CD, SBOMs, Agile software development.
React, TypeScript, JavaScript, Node.js, REST APIs, Backstage, Git, GitHub, Docker, AWS, Azure, GCP, Jest, Playwright, Cypress, CI/CD, SBOMs
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Senior Software Engineer - Cloud Services
Lebanon, New Hampshire, United States
$140k-$160k/yr OnsiteFull Time
Simbex: Develops medical devices and wearable sports technology solutions.
6+ YOE6+ years backend/cloud experience; strong Node.js/TypeScript and Python; AWS Lambda/API Gateway/RDS/S3/SQS/SNS; PostgreSQL; REST API design; CI/CD; bachelor's in CS or equivalent experience.
Node.js, TypeScript, Python, AWS Lambda, API Gateway, RDS, S3, SQS, SNS, PostgreSQL, GitHub Actions, Jenkins, MQTT, AMQP, AWS IoT Core, Docker, ECS, Kubernetes, Terraform, AWS CDK, CloudFormation, Kafka, Kinesis, OpenTelemetry, Datadog, Grafana, CloudWatch, Pact
2w
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Principal Software Engineer
Wilmington, Massachusetts, United States
$144k-$216k/yr OnsiteFull Time
8+ YOE3+ MgmtBachelor's degree or equivalent,8+ years quality engineering experience,3+ years technical leadership,proficiency in test automation,CI/CD,API testing,Agile.
Java, Python, C#, JavaScript, Selenium, Cypress, Playwright, Appium, RestAssured, MS Copilot, Jenkins, GitHub Actions, Azure DevOps, JMeter, Gatling, k6, Docker, Kubernetes, AWS, Azure
2mo
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Senior Software Engineer
Merrimack or Smithfield
OnsiteFull Time
Senior software engineer with RESTful APIs, JavaScript frameworks, databases, SDLC, CI/CD, mentoring, and strong OO design.
JavaScript, Angular, AngularJS, Backbone.js, React.js, CSS3
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Full Stack Engineer
Durham or Merrimack or Boston
$70-$110/hr OnsiteFull Time
8+ YOE8+ years Java/Spring experience, strong distributed systems and API skills, CI/CD and container experience, AWS knowledge, degree in CS/Engineering, strong problem solving and mentoring ability.
Java, Spring MVC, Spring, Springboot, Web Services, SOAP, REST, Jest, Jasmine, Docker, Jenkins, artifactory, uDeploy, GitHub, AWS
3mo
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Java Backend Engineer
Merrimack, New Hampshire, United States
$88k-$153k/yr OnsiteFull Time
6+ YOE6+ years backend Java experience with Spring/Spring Boot, API/microservices design, Oracle/DB2 and PL/SQL, CI/CD with Git/Jenkins/uDeploy, DevOps tooling; bachelor's degree required.
Java, Spring, Spring Boot, PL/SQL, Oracle, DB2, Git, Jenkins, uDeploy, Sonar, HP Operations Orchestration, ServiceNow, HP Service Manager, RESTful (Rest-APIs)
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Senior Electrical Engineer
Woburn or Billerica
$125k-$160k/yr OnsiteFull Time
5+ YOEBachelors in electrical or related field required; 5+ years designing and maintaining control systems; 3+ years PLC/HMI experience; experience with PLC protocols (RS-232, RS-485, Ethernet, SNMP, REST API), schematics, PID control, and firmware/PCBA work.
PLM software, MRP software, Oracle Cloud, PLC, HMI, PCBA, Mixed Signal Oscilloscope, DVM, RS-232, RS-485, Ethernet, SNMP, REST API, PID
1w
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Senior Embedded Software Engineer, Applied Automation Controls/Embedded Software
Seattle or North Reading
$168k-$227k/yr OnsiteFull Time
5+ YOE5+ years professional software and embedded firmware experience; strong C/C++ skills; experience with real-time control, motion/trajectory planning, industrial communications, API design (protobuf/gRPC); bachelor’s in computer science or equivalent.
Java, C++, C#, protobuf, gRPC, RTOS, EtherCAT, Profinet, EtherNet/IP, CI/CD
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Senior Electrical Engineer
Ayer, Massachusetts, United States
$82k-$141k/yr OnsiteFull Time
7+ YOEBS in Engineering, 7+ years electrical design/project engineering and software development experience; proficiency with C/C++, C#, Python, RESTful APIs, industrial network protocols, PLC/ladder logic, AutoCAD Electrical; strong communication and troubleshooting skills.
C, C++, C#, Python, RESTful APIs, AutoCAD Electrical, Visual Studio, .NET, IoT, Ethernet/IP, Modbus TCP, CAN Bus, DeviceNet, Ladder logic, Microsoft Office
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Lead Software Engineer, Meteorological Technologies
Andover or Atlanta
$150k-$190k/yr HybridFull Time
7+ YOE7+ years building cloud-based (e.g., AWS) production systems; domain experience in meteorology or forecasting; hands-on software delivery in 24x7 operational environments; AI/LLM integration, prompt engineering, and multi-project execution; proficiency in Python, JavaScript/TypeScript, or Go.
AWS, V0, GitHub CoPilot, Cursor, LLM, RAG, Python, JavaScript/TypeScript, Go, React, Next.js, Vercel, CI/CD, APIs
3mo
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IT Data Science Engineer (6100)
Newington, New Hampshire, United States
OnsiteFull Time
5+ YOEBachelor's or Master's in CS/Data Science/Information Systems,5+ years SQL Server,3+ years .NET,experience with Microsoft Azure data services,Power BI,DAX,APIs,strong analytical and communication skills.
SQL Server, Microsoft Azure Data Lake, Microsoft Fabric, Microsoft Azure SQL, Power BI, .NET, .NET Core, C#, ASP.NET, MVC, RESTful APIs, Microsoft Azure DevOps, Microsoft Synapse Analytics, Microsoft Azure App Service, Microsoft Azure Web apps, Microsoft Azure Active Directory (Entra ID), Microsoft Azure AI, OpenAI, DAX, JSON, XML
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Software Engineering Lead (Hybrid)
Hudson, New Hampshire, United States
$150k-$254k/yr HybridFull Time
Ability to obtain TS/SCI clearance; experience leading software teams; professional software development in defense/aerospace; C/C++, API design, Docker, CMake; requirements tools (Jama/DOORs); JIRA and gitlab experience; DevSecOps and embedded systems experience.
C, C++, Docker, CMake, Jama, DOORs, Atlassian JIRA, gitlab, Rust, UML, SysML