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Contract Frontend Developer Jobs in Chelsea, MA (NOW HIRING)

Klaviyo

Senior Recruiter (Contract)

Boston, MA · On-site

Our engineering org is consistently hiring across disciplines (backend, frontend, infrastructure ... contract position based in our Boston office; this is an hourly role and will be paid through an ...

Tasacom

Senior SQL Developer

Burlington, MA

Burlington, MA Duration : 6 Months contract Interview : Phone and Face to face in Burlington is ... Front-end development skills - JavaScript, jQuery, HTML, CSS SharePoint 2013/2016 experience ...

Tasacom

Senior SQL Developer

Burlington, MA · On-site

Burlington, MA Duration : 6 Months contract Interview : Phone and Face to face in Burlington is ... • Front-end development skills - JavaScript, jQuery, HTML, CSS • SharePoint 2013/2016 ...

TriOptus LLC

Python Full Stack Developer

Boston, MA · On-site

Experience in frontend development and user experience (UX) design required; experience with ... Duration: Long term * Contract to Hire: YES * Interview Details: 2 or 3 Total. One with the HM and ...

Conch Technologies Inc

UI Developer

Boston, MA · On-site

$54.25 - $70.50/hr

Hi, Greetings from Conch Technologies Position: UI Developer (front-end) Location: Boston, MA, and Merrimack, NH Duration: 12+ Months Contract Required Technical Skills * Experience developing and ...

Klaviyo

Senior Recruiter (Contract)

Boston, MA · On-site

$60 - $65/hr

Our engineering org is consistently hiring across disciplines (backend, frontend, infrastructure ... contract position based in our Boston office; this is an hourly role and will be paid through an ...

Klaviyo

Senior Recruiter (Contract)

Boston, MA · On-site

$60 - $65/hr

Our engineering org is consistently hiring across disciplines (backend, frontend, infrastructure ... contract position based in our Boston office; this is an hourly role and will be paid through an ...

Peraton

Full Stack Angular Developer

Boston, MA · On-site

$80K - $128K/yr

Frontend Development: Design, develop, and maintain responsive web applications using Angular 21 ... and contract considerations. Depending on the position, employees may be eligible for overtime ...

New

Cyma Systems Inc

AWS developer - W2

Quincy, MA · On-site

Multi Year Renewable Contract Hours: 37.5 hours per week Job Overview : Seeking to hire a motivated ... Frontend Development 3+ years hands-on React development experience Experience with modern React ...

Bristol Myers Squibb

Senior AI Engineer

Cambridge, MA

$114K - $156K/yr

Partner with frontend engineers throughout the software delivery lifecycle to define clean API contracts, streaming response patterns, error handling, and service-level behaviors that enable ...

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Showing results 21-40

All JobsContract Frontend Developer JobsContract Frontend Developer Jobs in Chelsea, MA

Contract Frontend Developer information

See Chelsea, MA salary details

$46.2K

$120K

$169K

How much do contract frontend developer jobs pay per year?

As of Aug 7, 2026, the average yearly pay for contract frontend developer in Chelsea, MA is $119,976.00, according to ZipRecruiter salary data. Most workers in this role earn between $113,000.00 and $131,500.00 per year, depending on experience, location, and employer.

What is a contract frontend developer?

Contract Frontend Developers are professionals hired on a temporary or project basis to build and maintain the user-facing parts of websites and web applications. They specialize in technologies like HTML, CSS, and JavaScript, and often work with frameworks such as React, Angular, or Vue.js. Unlike full-time employees, contract frontend developers typically work for a set duration or until the completion of specific tasks. Their flexible arrangement allows companies to scale development efforts according to project needs.

What are some common challenges contract frontend developers face when joining new projects, and how can they adapt quickly?

Contract Frontend Developers often need to ramp up rapidly with unfamiliar codebases and team workflows. Adapting quickly involves proactive communication with team members, thorough review of project documentation, and leveraging onboarding resources provided. Familiarity with popular frameworks and version control systems helps, but flexibility and a willingness to ask clarifying questions are key. Building rapport with the team and participating in code reviews can also accelerate the adaptation process.

What is the difference between Contract Frontend Developer vs Contract Web Developer?

AspectContract Frontend DeveloperContract Web Developer
Required SkillsHTML, CSS, JavaScript, frameworks like React or AngularHTML, CSS, JavaScript, backend integration, server-side scripting
Work EnvironmentFront-end focused, UI/UX design, client-side developmentFull-stack or backend focus, server management, database interaction
Industry UsageWeb applications, mobile apps, SaaS platformsWebsites, web applications, e-commerce platforms

Contract Frontend Developers specialize in creating the visual and interactive parts of websites and applications, focusing on client-side technologies. Contract Web Developers may handle both front-end and back-end tasks, working on the entire web development stack. While both roles require similar credentials, the Contract Frontend Developer role is more focused on UI/UX and front-end frameworks, making it ideal for projects emphasizing user interface design and interactivity.

What are the key skills and qualifications needed to thrive as a contract frontend developer?

To thrive as a Contract Frontend Developer, you need strong proficiency in HTML, CSS, JavaScript, and a solid understanding of modern frontend frameworks like React, Vue, or Angular, often supported by a relevant degree or bootcamp experience. Familiarity with version control systems (such as Git), build tools (Webpack, npm), and responsive design practices is typically required. Excellent problem-solving, communication, and time management skills help you adapt quickly and collaborate effectively with remote teams or multiple clients. These skills ensure timely, high-quality project delivery and seamless integration into diverse development environments.
What are the most commonly searched types of Frontend Developer jobs in Chelsea, MA? The most popular types of Frontend Developer jobs in Chelsea, MA are:
What cities near Chelsea, MA are hiring for Contract Frontend Developer jobs? Cities near Chelsea, MA with the most Contract Frontend Developer job openings:
Contract Frontend Developer jobs near you
Infographic showing various Contract Frontend Developer job openings in Chelsea, MA as of June 2026, with employment types broken down into 34% Full Time, 59% Part Time, 2% Temporary, and 5% Contract. Highlights an 84% Physical, 2% Hybrid, and 14% Remote job distribution, with an average salary of $119,976 per year, or $57.7 per hour.

Senior Software Engineer, Scientific System of Record

Lila Sciences

Cambridge, MA • On-site

$133K - $176K/yr

Full-time

Medical, Dental, Vision, Life

Re-posted 4 days ago

Job description

Your Impact at LILA
Join us in shaping the future of science! We are seeking Senior Software Engineers with full stack experience to join our Scientific System of Record Team (SSR), where you'll collaborate with software engineers, lab scientists, and machine learning engineers to build cutting-edge tools for automated scientific analysis and more. If you thrive in a collaborative, fast-paced environment and bring best practices in git, development workflows, and user-centered design, we want to hear from you!
About The Team
The Scientific System of Record Team (SSR) builds the memory layer for Lila's operations. It answers two questions:what did we plan to build? and what actually happened? These systems connect scientific intent to physical reality. Together with the data and automation teams, their systems ensure reproducibility and close the Design-Build-Test-Learn (DBTL) loop.
What You'll Be Building
  • Lab Execution and Scientific Workflows: Build systems that model scientific intent, experiment planning, protocol execution, sample and asset state, operational events, and results capture across complex lab workflows.
  • User Interfaces and APIs: Design and implement high-quality, secure, and well-documented UIs and APIs that support scientists, automation systems, ML workflows, and AI-driven applications.
  • Application Development: Build front-end and backend services with a focus on performance, maintainability, and reliability.
  • Data and System Modeling: Develop domain models, schemas, indexes, and data contracts across SQL, NoSQL, vector databases, data lakehouses, and other scientific data systems.
  • Reliability, Performance, and Scale: Diagnose bottlenecks, improve system performance, and contribute to observability, reliability, and operational excellence for production systems.
  • Cloud and Infrastructure: Use AWS services, Kubernetes, and modern DevOps practices to build and deploy production-grade systems.
  • Cross-Functional Collaboration: Partner with scientists, ML researchers, platform engineers, data engineers, automation teams, and product managers to translate scientific and operational needs into software.
  • Engineering Quality: Contribute to architecture discussions, code reviews, testing practices, documentation, and shared engineering standards.

What You'll Need To Succeed
  • Bachelor's or Master's degree in Computer Science, Engineering, or related field.
  • 4-6+ years of engineering experience building and deploying large-scale systems in production. You must be strong in either front-end or backend.
  • Strong expertise in at least one of the following areas, with the ability to work across the stack: front-end engineering, backend engineering, or data modeling and system design.
  • TypeScript, React, and Python: Strong experience building modern applications with React and TypeScript; Python experience is strongly preferred.
  • Application and API Development: Experience designing, building, and maintaining APIs, services, and application components with a focus on reliability, performance, and maintainability.
  • Databases and Data Modeling: Experience with SQL and at least one of NoSQL, vector databases, search systems, or data lakehouse architectures; familiarity with schema design, indexing, and query optimization.
  • Production Systems: Experience operating production software, including debugging, monitoring, performance tuning, and improving reliability over time.
  • Collaboration: Strong communication skills and a track record of working cross-functionally with engineers, product teams, scientists, or other domain experts.
  • Problem Solving: Ability to take ownership of ambiguous technical problems, make practical trade-offs, and deliver maintainable solutions.
  • Hands-on experience using AI coding assistants or AI-augmented engineering workflows to improve productivity.

Bonus Points For
  • Cloud and DevOps: Hands-on experience with AWS, GCP, or Azure; strong understanding of Kubernetes, containerization, infrastructure as code such as Terraform or CloudFormation, and CI/CD pipelines such as GitHub Actions.
  • Orchestration Systems: Experience with orchestration tools such as Flyte, Temporal, Airflow, Prefect, or similar systems.
  • Experience building laboratory, scientific workflow, LIMS, ELN, data platform, or ML platform products.
  • Experience designing systems that support auditability, traceability, reproducibility, data provenance, or regulated workflows.

Compensation
We offer competitive base compensation with bonus potential and generous early-stage equity. Your final offer will reflect your background, expertise, and expected impact.
U.S. Benefits. Full-time U.S. employees receive a comprehensive benefits program including medical, dental, and vision coverage; employer-paid life and disability insurance; flexible time off with generous company wide holidays; paid parental leave; an educational assistance program; commuter benefits, including bike share memberships for office based employees; and a company subsidized lunch program.
International Benefits. Full-time employees outside the U.S. receive a comprehensive benefits program tailored to their region. USD salary ranges apply only to U.S.-based positions; international salaries are set to local market.
Expected Base Salary Range
$144,000-$240,000 USD
About LILA
Lila Sciences is building Scientific Superintelligence™ to solve humankind's greatest challenges. We believe science is the most inspiring frontier for AI. Rather than hard-coding expert knowledge into tools, LILA builds systems that can learn for themselves.
LILA combines advanced AI models with proprietary AI Science Factory™ instruments into an operating system for science that executes the entire scientific method autonomously, accelerating discovery at unprecedented speed, scale, and impact across medicine, materials, and energy. Learn more at www.lila.ai.
Guided by our core values of truth, trust, curiosity, grit, and velocity, we move with startup speed while tackling problems of historic importance. If this sounds like an environment you'd love to work in, even if you don't meet every qualification listed above, we encourage you to apply.
We're All In
Lila Sciences is committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status.
Information you provide during your application process will be handled in accordance with our Candidate Privacy Policy.
A Note to Agencies
Lila Sciences does not accept unsolicited resumes from any source other than candidates. The submission of unsolicited resumes by recruitment or staffing agencies to Lila Sciences or its employees is strictly prohibited unless contacted directly by Lila Science's internal Talent Acquisition team. Any resume submitted by an agency in the absence of a signed agreement will automatically become the property of Lila Sciences, and Lila Sciences will not owe any referral or other fees with respect thereto.

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