Explore 5 java react developer jobs from 2 hiring companies in Swanzey, NH, US. Filter by remote, salary, experience, and company, then open any listing to apply.

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Java React Developer

Keene

Gardner

Greenfield

Brattleboro

Fitchburg

West Swanzey

Leominster

Worcester

Amherst

Athol

Manchester

Nashua

Bedford

Merrimack

Northampton

Claremont

Rindge

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Java React Developer Jobs

Fidelity Investments

The Hanover Insurance Group

Hybrid

<h2></h2><h2>Job Description:</h2>Principal Full Stack Developer – FFIO Market DataNote: Fidelity is not providing immigration sponsorship for this positionThe RoleWe’re seeking a highly skilled Principal Full Stack Developer with deep expertise in Java and Spring Boot to help build modern, scalable, and cloud‑enabled market data applications. Many of the systems you’ll develop may be internet‑facing or externally accessible, requiring a strong focus on secure design, data protection, and resilient architecture from the outset. In this role, you will design, develop, test, and deploy services that support Fidelity’s mission‑critical market data ecosystem. You’ll work with technologies such as Java, Spring Boot, REST APIs, Angular/React, Apache Camel (nice to have), AWS, and distributed databases. Collaboration across engineering, architecture, and product teams will be essential as you deliver high‑quality solutions that help millions of Fidelity customers make informed financial decisions. This opportunity offers hands‑on experience with core Fidelity financial systems and the chance to build applications that power some of our most high‑value data pipelines.The Expertise and Skills You Bring<ul><li>8&#43; years developing enterprise applications with Java</li><li>8&#43; years building microservices using Spring Boot</li><li>Strong full‑stack experience with modern front‑end frameworks (React, Angular, or similar)</li><li>Proficiency in REST API design and implementation</li><li>Knowledge of secure coding practices and OWASP considerations</li><li>Experience with API authentication/authorization (OAuth2, OIDC, JWT)</li><li>Ability to protect data in transit and at rest</li><li>Understanding of threat exposure, rate limiting, and input validation</li><li>Hands‑on experience with AWS services (EC2, EKS, S3, Lambda)</li><li>Development experience with Apache Camel (nice to have)</li><li>Experience with databases such as Oracle, Cassandra, PostgreSQL, or YugabyteDB</li><li>Familiarity with CI/CD and containerization tools (Jenkins, GitLab, Docker, Kubernetes)</li><li>Strong automated testing skills (unit, integration, performance)</li><li>Delivery‑focused mindset with strong collaboration and commitment to engineering excellence</li><li>Strong troubleshooting abilities across application, system, and network layers, with a Bachelor’s or Master’s in Computer Science or related field</li></ul>The Team The FFIO Market Data Engineering team delivers and supports innovative, high‑performance market data service solutions for internal business partners and external customers. Our engineers thrive in an environment of curiosity, experimentation, and continuous improvement—always driving toward a differentiated market data experience for Fidelity associates and clients.<h2></h2><h2>Certifications:</h2><h2></h2><h2>Category:</h2><h2></h2>Information TechnologyMost roles at Fidelity are Hybrid, requiring associates to work onsite every other week (all business days, M-F) in a Fidelity office. This does not apply to Remote or fully Onsite roles. Some roles may have unique onsite requirements. Please consult with your recruiter for the specific expectations for this position.Please be advised that Fidelity’s business is governed by the provisions of the Securities Exchange Act of 1934, the Investment Advisers Act of 1940, the Investment Company Act of 1940, ERISA, numerous state laws governing securities, investment and retirement-related financial activities and the rules and regulations of numerous self-regulatory organizations, including FINRA, among others. Those laws and regulations may restrict Fidelity from hiring and/or associating with individuals with certain Criminal Histories.

Principal, Full Stack Engineer- Java, Spring Boot, React/Angular, AWS

Full Stack Engineer

8+ years Java; 8+ years Spring Boot; strong full‑stack with React/Angular; REST APIs; AWS; CI/CD; secure coding; databases.

<h2></h2><h2>Job Description:</h2><h1>Senior Software Engineer</h1><h1></h1><h1></h1><h1>Note: Fidelity is not providing immigration sponsorship for this position</h1>Overview The Cash Management organization, referred to as Cash Bankers, is an agile team within Fidelity Fund and Investment Operations Technology (FFIOT). The team is responsible for designing, developing, and supporting core applications that enable Cash operations across Middle Office functions. Within this group, the Cash Bankers squad focuses on building and maintaining key Cash platforms, including:<ul><li>Cash Availability – calculates and delivers accurate, real-time spendable cash information to Portfolio Managers.</li><li>Cash Hub – processes and distributes cash allocations across the fund’s sub-portfolio structure.</li></ul>The Senior Software Engineer role, based in Westlake, TX, will play a critical part in supporting the modernization of the Cash Availability platform.<h1></h1><h1></h1>What You&#39;ll Do <ul><li>Develop and enhance enterprise-grade applications supporting Cash Availability and Cash Allocation workflows.</li><li>Lead the design and development of scalable APIs, microservices, and distributed services using Java, Spring Boot, and modern architectural patterns.</li><li>Contribute to the design of database schemas, stored procedures, and performant SQL within Oracle or MySQL environments.</li><li>Ensure engineering excellence through strong code review practices, robust unit/integration testing, and continuous delivery pipelines.</li><li>Collaborate across technical and business teams to deliver high-quality solutions in a fast-paced agile environment.</li><li>Troubleshoot complex issues across applications, systems, and network layers, ensuring operational resilience.</li><li>Partner with DevOps to improve CI/CD automation using Jenkins, GitHub, SonarQube and related tooling.</li></ul>The Expertise and Skills You Bring<ul><li>Bachelor’s or Master’s degree in Computer Science, Engineering, Information Technology, or a related field (or equivalent experience)</li><li>7&#43; years of hands-on software engineering experience building enterprise systems. • Strong proficiency with Java/J2EE, Java 17, Spring (Core, Boot, MVC), and modern REST API development.</li><li>Microservices architecture design and implementation.</li><li>Experience with modern front-end frameworks such as Angular or React.</li><li>Solid expertise in Oracle SQL, PL/SQL, schema design, and related data engineering technologies.</li><li>Hands-on experience with AWS (EC2, EKS, S3, Lambda, RDS).</li><li>Experience with CI/CD, testing automation (JUnit, Cucumber), Git, and DevOps practices.</li><li>Exposure to Informatica/ETL, ORM frameworks (Hibernate, MyBatis, JPA), and container technologies.</li><li>Leveraging GenAI tools to build innovative solutions Domain Experience</li><li>Background in financial services, preferably within asset management or middle/back-office operations. Professional &amp; Soft Skills • Strong analytical and problem-solving abilities.</li><li>Clear communication skills with the ability to articulate business and technical requirements.</li><li>Proven ability to work independently while collaborating effectively in a team environment. • Demonstrated commitment to high engineering standards and continuous improvement. • Experience working in agile methodologies such as Scrum, XP, or Kanban. Education Fidelity Internal Information</li></ul><h2></h2><h2>Certifications:</h2><h2></h2><h2>Category:</h2><h2></h2>Information TechnologyMost roles at Fidelity are Hybrid, requiring associates to work onsite every other week (all business days, M-F) in a Fidelity office. This does not apply to Remote or fully Onsite roles. Some roles may have unique onsite requirements. Please consult with your recruiter for the specific expectations for this position.Please be advised that Fidelity’s business is governed by the provisions of the Securities Exchange Act of 1934, the Investment Advisers Act of 1940, the Investment Company Act of 1940, ERISA, numerous state laws governing securities, investment and retirement-related financial activities and the rules and regulations of numerous self-regulatory organizations, including FINRA, among others. Those laws and regulations may restrict Fidelity from hiring and/or associating with individuals with certain Criminal Histories.

Senior Software Engineer

7+ years software engineering; Java/J2EE, Java 17, Spring Boot; microservices; Oracle SQL; AWS; CI/CD; Agile; relational databases.

Principal Application Engineer (MA HYBRID OR REMOTE)

Principal Application Engineer

7+ years software development; full-stack React + Java; strong Java/Spring Boot; leadership and mentoring.

<h2></h2><h2>Job Description:</h2>The Role Fidelity Stock Transfer (FST) in Fidelity Labs is looking for a Principal Full Stack Engineer to join us. As a key member of a growing engineering team, this role will be hands-on building the technology and architecture of world class end-to-end systems. Learn more about FST at <a target="_blank" href="https://fidelitystocktransfer.com/" rel="noopener noreferrer">fidelitystocktransfer.com</a> The Team We are Fidelity Labs, Fidelity Investments’ in-house fintech incubator with a mission to build new businesses to drive growth for Fidelity. We seek to shape the future of our industry by building new products and services to improve the lives of the diverse set of customers, businesses and financial institutions we serve. Fidelity Labs is a dynamic workplace that combines the best parts of startup life—building from scratch, adapting quickly, and moon-shot ambition—with the scale and stability of an industry leader. We provide a safe space for startup teams to explore new business ideas, quickly test them with customers, and scale the most promising concepts within an existing business unit, or as a new venture. This opportunity is brought to you by Fidelity Labs. Learn more at <a target="_blank" href="https://labs.fidelity.com/" rel="noopener noreferrer">labs.fidelity.com</a>. The Expertise You Have <ul><li>Strong software experience in developing, a proven track record of delivering web applications and a seasoned team leader proficient with the entire SDLC process. </li></ul><ul><li>Expert level knowledge using React and/or Angular to build a single page application from scratch. Bonus points for experience with Storybook JS, React Native, Ionic and knowledge of micro-frontends architecture. </li></ul><ul><li>Proficient level knowledge of RESTful APIs (Node.js &amp; Java) and good knowledge of standard methodologies in API design. </li></ul><ul><li>Professional experience integrating applications with REST based services. </li></ul><ul><li>Full-stack development experience using Angular or React, Node.js or Java, HTML, CSS, JavaScript and Spring MVC/Spring Core/Web Services. Bonus points for experience with Storybook JS, Ionic, API management software such as Apigee and knowledge of micro-frontends architecture. </li></ul><ul><li>Use deep knowledge of the suitable technologies to ensure proposed solutions are feasible and translate requirements to actionable items for development. </li></ul><ul><li>You are comfortable working in an Agile software delivery environment, with exposure to continuous integration and continuous delivery tools. </li></ul><ul><li>Learning, adapting and adopting new concepts &amp; technologies quickly and implementing them optimally. </li></ul><ul><li>Understanding of fundamental design principles for building a modular and scalable platform. </li></ul><ul><li>You build positive relationships with other team members and have excellent verbal and written communication. </li></ul> The base salary range for this position is $107,000-216,000 USD per year.  Placement in the range will vary based on job responsibilities and scope, geographic location, candidate’s relevant experience, and other factors.Base salary is only part of the total compensation package. Depending on the position and eligibility requirements, the offer package may also include bonus or other variable compensation.   We offer a wide range of <a target="_blank" href="https://jobs.fidelity.com/benefits/">benefits</a> to meet your evolving needs and help you live your best life at work and at home.  These benefits include comprehensive health care coverage and emotional well-being support, market-leading retirement, generous paid time off and parental leave, charitable giving employee match program, and educational assistance including student loan repayment, tuition reimbursement, and learning resources to develop your career.  Note, the application window closes when the position is filled or unposted.Please be advised that Fidelity’s business is governed by the provisions of the Securities Exchange Act of 1934, the Investment Advisers Act of 1940, the Investment Company Act of 1940, ERISA, numerous state laws governing securities, investment and retirement-related financial activities and the rules and regulations of numerous self-regulatory organizations, including FINRA, among others. Those laws and regulations may restrict Fidelity from hiring and/or associating with individuals with certain Criminal Histories.Most roles at Fidelity are Hybrid, requiring associates to work onsite every other week (all business days, M-F) in a Fidelity office. This does not apply to Remote or fully Onsite roles. Please consult with your recruiter for the specific expectations for this position.<h2></h2><h2>Certifications:</h2><h2></h2><h2>Category:</h2><h2></h2>Information Technology

Principal Full Stack Engineer

Strong full stack web development with React/Angular, Node.js/Java, REST APIs, SDLC, Agile; micro-frontends experience preferred.

Bachelor’s degree or 7+ years software development; 10+ years total experience; strong Java/Spring Boot, React.js; excellent communication; eligible to work in the US without sponsorship.

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