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Fullstack Javascript Developer Jobs in Massachusetts

Liberty Mutual

Principal Software Engineer

Boston, MA · Hybrid

$146K - $196K/yr

Design, build, and integrate fullstack solutions using JavaScript/TypeScript, React, Node.js, Next ... Familiarity with functional and system integration testing, a history of practicing DevOps and ...

Nvidia

Senior Fullstack Software Engineer

Westford, MA · Hybrid

$127K - $167K/yr

Develop web tools in Golang, typescript, and javascript to manage our product definitions at the ... A love for engineering and passion for what you do Experience with container technologies like ...

Nvidia

Senior Fullstack Software Engineer

Westford, MA · Hybrid

$127K - $167K/yr

Develop web tools in Golang, typescript, and javascript to manage our product definitions at the ... A love for engineering and passion for what you do * Experience with container technologies like ...

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Fullstack Javascript Developer information

See Massachusetts salary details

$32.2K

$116.4K

$184.6K

How much do fullstack javascript developer jobs pay per year?

As of Sep 4, 2026, the average yearly pay for fullstack javascript developer in Massachusetts is $116,402.00, according to ZipRecruiter salary data. Most workers in this role earn between $72,100.00 and $139,800.00 per year, depending on experience, location, and employer.

What is a fullstack JavaScript developer?

A Fullstack JavaScript Developer is a software engineer who works on both the frontend and backend of web applications using JavaScript-based technologies. They develop user interfaces with frameworks like React, Angular, or Vue.js while also managing server-side logic using Node.js with databases like MongoDB or PostgreSQL. Their responsibilities include designing, coding, testing, and deploying applications to ensure seamless functionality across the entire stack.

What are the key skills and qualifications needed to thrive as a fullstack JavaScript developer?

To thrive as a Fullstack Javascript Developer, you need proficiency in both frontend and backend JavaScript frameworks such as React, Angular, or Vue.js, and Node.js, along with a solid understanding of web development concepts and a relevant degree or coding bootcamp experience. Familiarity with databases (SQL, MongoDB), version control systems (Git), cloud platforms, and agile development tools is commonly expected, and certifications like AWS Certified Developer can be beneficial. Strong problem-solving abilities, teamwork, and clear communication help developers collaborate effectively and adapt to rapidly changing project requirements. These combined skills enable developers to build, deploy, and maintain comprehensive web applications that meet real-world business needs.

What does a typical workday look like for a fullstack JavaScript developer?

A typical day for a Fullstack Javascript Developer involves a mix of coding, collaborating with other developers, and attending meetings to discuss project requirements or progress. You might spend your morning implementing new features or fixing bugs in either the frontend or backend of an application, and your afternoon reviewing code, handling pull requests, or optimizing performance. Working with product managers, designers, and QA testers is common to ensure the application meets both technical standards and user needs. The work environment is often fast-paced and collaborative, offering opportunities to learn from peers and stay updated with the latest technologies.

What are popular job titles related to Fullstack Javascript Developer jobs in Massachusetts?

For Fullstack Javascript Developer jobs in Massachusetts, the most frequently searched job titles are:

What job categories do people searching Fullstack Javascript Developer jobs in Massachusetts look for?

The top searched job categories for Fullstack Javascript Developer jobs in Massachusetts are:

Fullstack Javascript Developer jobs near you
Infographic showing various Fullstack Javascript Developer job openings in Massachusetts as of August 2026, with employment types broken down into 79% Full Time, 7% Part Time, 1% Temporary, 12% Contract, and 1% Nights. Highlights an 81% Physical, 5% Hybrid, and 14% Remote job distribution, with an average salary of $116,402 per year, or $56 per hour.

Frontend Engineer, AI Observability & Evals Platform

Worky

Cambridge, MA • On-site

$160 - $195/hr

Other

Medical, Dental, Vision, Retirement, PTO

Posted 17 days ago

Key responsibilities

  • Develop new user-facing features using React and Typescript.

  • Build reusable components and front-end libraries for future use.

  • Collaborate with fullstack and backend developers and UX/UI designers to enhance usability.

Job description

About Us

At LangChain, our mission is to make intelligent agents ubiquitous. We build the foundation for agent engineering in the real world, helping developers move from prototypes to production-ready AI agents that teams can rely on. We began as widely adopted open-source tools and have grown to also offer a platform for building, evaluating, deploying, and operating agents at scale.

With $125M raised at Series B from IVP, Sequoia, Benchmark, CapitalG, and Sapphire Ventures, we’re at a stage where we’re continuing to develop new products, growth is accelerating, and all team members have meaningful impact on what we build and how we work together. LangChain is a place where your contributions can shape how this technology shows up in the real world.

Today, our platform includes LangSmith (Observability, Evaluation, Deployment, Fleet, and Sandboxes), our open source frameworks (LangChain, LangGraph, and Deep Agents), and the newly launched LangSmith Engine for autonomous agent improvement. We have 100M+ monthly open source downloads, 6,000+ active LangSmith customers, and 5 of the Fortune 10 use LangSmith in production (+ 35% of the Fortune 500 overall), including teams at Klarna, Clay, Coinbase, Workday, Lyft, Cloudflare, Harvey, Rippling, Vanta, LinkedIn, Monday.com, Nvidia, and Bridgewater.

About The Role:

We’re looking to add a frontend engineer to develop and enhance new features on LangSmith, working on our enterprise platform product for LLM application observability, testing, and debugging.

*This role can be based in our San Francisco, New York, or Boston office. Employees within commuting distance work from the office five days per week. Candidates who live outside commuting distance (e.g. >1hr each way), may be eligible for hybrid arrangements depending on location and role requirements.


What You Will Do:

  • Develop new user-facing features using React & Typescript

  • Build reusable components and front-end libraries for future use

  • Translate designs and wireframes into high-quality code

  • Optimize components for maximum performance across a vast array of web-capable devices and browsers

  • Collaborate with fullstack and backend developers and UX/UI designers, to enhance usability

What You Will Bring:

  • 2+ years of Front-end engineering experience with strong proficiency in React, JavaScript and TypeScript

  • Hands-on experience with front-end development tools like Babel, Vite, Webpack, NPM, and Yarn

  • Familiarity with REST APIs and experience working closely with fullstack and backend engineers

  • Knowledge of modern authorization mechanisms, such as JWTs

  • A passion for user experience, design and building clean, engaging, and intuitive interfaces

  • Strong written and oral communication skills, with the ability to explain technical concepts clearly and concisely to both technical and non-technical stakeholders

  • The DNA to thrive in a start-up, fast-paced environment. Views unstructured environments as an opportunity to figure out the most impactful work and help define the future success of the company

  • An ownership mind-set. You are self-driven and look for opportunities to make an impact.

  • Strong computer science fundamentals, ideally with a degree in computer science or related field

Compensation

  • Annual salary range: $160,000-$195,000 USD

Compensation Philosophy:

We offer competitive compensation that includes base salary, variable compensation for relevant roles, meaningful equity, benefits, and perks. Actual compensation and offerings will vary based on role, level, and location. Team members in the EU, UK, and APAC receive locally competitive benefits aligned with regional norms and regulations.

Benefits

Benefits include medical, dental, and vision coverage, flexible vacation, a 401(k) plan, meals on in-office days in the US and more.

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