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Freelance Full Stack Developer Jobs in Boston, MA

As a Mission Engineer (Full Stack) in the Mission Applications Group, you will develop and deploy software essential for a specific, real-world objective or "mission" in partnership with our ...

Full Stack Developer

Arlington, MA · On-site

$65K - $82K/yr

Summary The Full Stack Developer will be a key member of Leader Bank's Technology Development Team, helping design, build, deploy, and support modern web applications, APIs, integrations, and ...

Summary The Full Stack Developer will be a key member of Leader Bank's Technology Development Team, helping design, build, deploy, and support modern web applications, APIs, integrations, and ...

... stack quickly AWS exposure Detailed JD as below We're looking for a Java Tech Lead / Sr. Developer to help build and maintain spring based java back-end applications, Angular JS and Ext JS web ...

Kelmar's Full-Stack Developers build and enhance web applications in Angular and Spring Boot, drive technical quality through code reviews and testing practices, and mentor junior developers as they ...

As a Full Stack Software Engineer, you will design and build a centralized Knowledge Base and a suite of Internal Tools that bridge the gap between raw robotic telemetry and actionable human insights.

Kelmar's Full-Stack Developers build and enhance web applications in Angular and Spring Boot, drive technical quality through code reviews and testing practices, and mentor junior developers as they ...

Full Stack Java Developer

Boston, MA · On-site

$57 - $73.50/hr

Full Stack Java Developer Location: Boston/Portsmouth, MA Job Type: Full time JOB RESPONSIBILITIES: * Should be able to write / design Cloud native code in Java, JavaScript based that meets the ...

Lead Full Stack Developer

Boston, MA · On-site

$70 - $80/hr

Hybrid 4 days onsite in Boston, MA Our client seeks a Lead Full Stack Developer and offshore coordinator to serve as the primary liaison between business stakeholders, onsite leadership, and an ...

Lead Full Stack Developer

Boston, MA · On-site

$70 - $80/hr

Hybrid 4 days onsite in Boston, MA Our client seeks a Lead Full Stack Developer and offshore coordinator to serve as the primary liaison between business stakeholders, onsite leadership, and an ...

Full Stack Engineer Location: Boston, MA - 5 days a week onsite is required Length: 6-10 months Top Skills Required: Top must haves: Java & AWS - with some exposure to React is fine Must be a team ...

Expert programming skill in Spring Boot , Java Frameworks , Java EE architecture * Front-end web development experience with HTML5, JavaScript / JavaScript based frameworks, and CSS3 is desirable

Full Stack Developer

Foxboro, MA · On-site

$120K - $140K/yr

Experience with one or more programming languages such as C#, Java, or Visual Basic * Familiarity with version control tools (GitHub, Azure DevOps) * Experience with Power BI for reporting and ...

Today, BBN's scientists and engineers are working to advance the state-of-the-art on topics ranging from machine language translation to quantum cryptography. BBN offers the opportunity to perform ...

Showing results 21-40

Freelance Full Stack Developer information

See Boston, MA salary details

$26

$64

$93

How much do freelance full stack developer jobs pay per hour?

As of Aug 10, 2026, the average hourly pay for freelance full stack developer in Boston, MA is $64.38, according to ZipRecruiter salary data. Most workers in this role earn between $53.56 and $74.18 per hour, depending on experience, location, and employer.

What is a freelance full stack developer?

A Freelance Full Stack Developer is a self-employed professional who builds both the front-end and back-end of websites or applications. They work with various technologies, including databases, servers, APIs, and client-side interfaces, to create fully functional digital products. Unlike full-time employees, freelancers work on a project basis for multiple clients, offering flexibility in workload and schedule. Their responsibilities often include coding, debugging, deployment, and sometimes design.

What types of projects and clients can freelance full stack developers typically expect to work with?

Freelance Full Stack Developers often engage with a diverse range of projects, including website and web application development, e-commerce platforms, mobile app backends, and API integrations. Clients can range from startups and small businesses to established companies and entrepreneurs seeking bespoke digital solutions. The variety in clients and project scopes allows developers to constantly expand their skills and work experience, but it also means adapting quickly to new industries and client expectations. Freelancers typically manage their own workflow, communicate directly with clients, and are responsible for project timelines, making this role ideal for self-motivated technology professionals.

What are the key skills and qualifications needed to thrive as a freelance full stack developer?

To thrive as a Freelance Full Stack Developer, you need a solid grasp of both front-end and back-end programming languages (such as JavaScript, HTML/CSS, Node.js, Python, or similar) and a strong portfolio showcasing completed projects. Familiarity with frameworks like React or Angular, version control systems like Git, cloud services, and sometimes relevant certifications (such as AWS Certified Developer) are highly valued. Excellent communication, problem-solving abilities, time management, and client relationship skills help set freelancers apart. These competencies are crucial for effectively delivering end-to-end solutions, managing multiple projects, and building a reliable client base.

What are the most commonly searched types of Full Stack Developer jobs in Boston, MA? The most popular types of Full Stack Developer jobs in Boston, MA are:
What are popular job titles related to Freelance Full Stack Developer jobs in Boston, MA? For Freelance Full Stack Developer jobs in Boston, MA, the most frequently searched job titles are:
What cities near Boston, MA are hiring for Freelance Full Stack Developer jobs? Cities near Boston, MA with the most Freelance Full Stack Developer job openings:
Infographic showing various Freelance Full Stack Developer job openings in Boston, MA as of August 2026, with employment types broken down into 65% Full Time, 13% Part Time, and 22% Contract. Highlights an 61% In-person, 13% Hybrid, and 26% Remote job distribution, with an average salary of $133,905 per year, or $64.4 per hour.

Full Stack Developer

STR

Woburn, MA

$175K - $240K/yr

Full-time

Re-posted 6 days ago


Job description

About the Team:

Information processing and sense-making systems are the lifeblood of national security efforts, facilitating an understanding of the global situation, strategic planning, and tactical execution. The reliability, accessibility, and sophistication of these systems can determine the outcomes of conflicts before they begin. STR's Analytics and Command & Control (AC2) Division focuses on developing actionable, advanced technology solutions to provide asymmetric advantages within the information domain.

The Mission Applications (MA) Group within the AC2 Division specializes in ensuring the technology that STR creates produces outsized mission impact. Staff within the MA group have a deep understanding of missions and technology needs for national security with skills targeting transition of technology to operational use, including product management, UX Product implementation, software integration & mission engineering, platform engineering, DevOps, and program management. MA staff combine with other science and engineering staff from the various STR research and development groups to form dedicated product teams focused on accelerating the operational transition of cutting-edge software technologies.

The Role:

As a Mission Engineer (Full Stack) in the Mission Applications Group, you will develop and deploy software essential for a specific, real-world objective or "mission" in partnership with our customers. You have: 1) expertise in developing and deploying software solutions in complex and high-security environments, 2) deep domain knowledge in the complex missions executed across the Department of Defense, and 3) expertise in modern frameworks, building full stack applications, and integrating APIs for deployment in high-security environments.

You will work as a leader of software teams to design, develop, and maintain software systems deployed in operational use. You have experience managing customer relationships while simultaneously leading engineering teams to ensure the delivered product meets the highest standards of quality, reliability, and performance. 

What you will do:

  • Build Prototype Capabilities: Break down use cases and user-defined problems, build an MVP, and rapidly evolve a solution into a cohesive application
  • Develop and Enhance Features: Create high-performance, visually appealing frontend solutions that handle complex use cases effectively. Ensure the product is fast, smooth, and intuitive to use, even under heavy load
  • System Integration: Leading cross functional engineering teams to design, build, and deploy a cohesive system. Integrate independent capabilities into existing solutions
  • Customer Collaboration: Working closely with end-users and customers, who are typically military or Government operators, to understand their requirements and translate them into software features. You are experienced in product discovery best practices
  • Deployment and Field Testing: Traveling to integration sites to deploy, test, and triage software in secure operational environments. On average, travel to customer sites should not exceed one week per month

Who You Are:

  • Active Secret Security Clearance with the ability to obtain Top Secret level with SCI Eligibility
  • BS in Computer Science or related technical field with at least 7 years of work experience. Equivalent experience will be considered
  • Experience deploying software for DoD or IC missions
  • A passion for crafting user-centric interfaces and a keen eye for design details
  • Demonstrated strong knowledge of modern technologies such as React, TypeScript, and Python
  • Knowledge of performance-focused tools and techniques for rendering large datasets and building responsive, smooth interfaces
  • A demonstrated ability to adopt new languages, libraries, and technologies
  • Organized, detail-oriented, and with an ability to work both independently and collaboratively
  • Demonstrated experience as an effective communicator to both technical and non-technical audiences

Even Better:

  • Advanced Degree in Computer Science, Information Technology, or related technical field
  • Prior US Military Service with experience in joint planning, large force battle monitoring, and fluidity with large force debrief best practices
  • Located in San Diego, CA, Denver, CO, Arlington, VA, or Boston, MA, or willing to relocate

Pay Information
Full-Time Salary Range: $175,000 - $240,000

The salary range listed is based on external market data. Offers are based on factors, such as but not limited to, the candidate's experience, education, training, key skills/critical skills, security clearances, and prevailing market and business conditions.

STR is a growing technology company with locations near Boston, MA, Arlington, VA, near Dayton, OH, Melbourne, FL, and Carlsbad, CA. We specialize in advanced research and development for defense, intelligence, and national security in: cyber; next generation sensors, radar, sonar, communications, and electronic warfare; and artificial intelligence algorithms and analytics to make sense of the complexity that is exploding around us.

STR is committed to creating a collaborative learning environment that supports deep technical understanding and recognizes the contributions and achievements of all team members. Our work is challenging, and we go home at night knowing that we pushed the envelope of technology and made the world safer.

STR is not just any company. Our people, culture, and attitude along with their unique set of skills, experiences, and perspectives put us on a trajectory to change the world. We can't do it alone, though - we need fellow trailblazers. If you are one, join our team and help to keep our society safe! Visit us at www.str.us for more info.


STR is an equal opportunity employer. We are fully dedicated to hiring the most qualified candidate regardless of race, color, religion, sex (including gender identity, sexual orientation and pregnancy), marital status, national origin, age, veteran status, disability, genetic information or any other characteristic protected by federal, state or local laws.

If you need a reasonable accommodation for any portion of the employment process, email us at appassist@str.us and provide your contact info.

Pursuant to applicable federal law and regulations, positions at STR require employees to obtain national security clearances and satisfy the requirements for compliance with export control and other applicable laws.