Senior Front-End Developer
$125kSynergy ECP
NetServices (NSI) is an IT services firm with a long-standing reputation for delivering high-quality, cost-effective solutions to drive lasting results. Now operating as a subsidiary of Synergy ECP, NSI continues to stand out in a crowded contracting landscape through its agility, strong customer focus, and commitment to retaining exceptional talent. By taking on challenging IT initiatives, we cultivate our talent and are continually evolving through our partnerships with clients. Our close-knot team of highly cleared engineers, analysts, and program managers represent some of the best talent locally available.
As a Front‑End Developer , you will contribute to the design, development, and maintenance of modern, user‑focused web applications that support mission operations. You will build responsive and high‑performance interfaces using React, TypeScript, JavaScript, Node.js, HTML, and CSS, ensuring seamless integration with .NET backend services and AWS‑hosted environments. In this role, you will collaborate closely with UX designers, backend engineers, and product teams to implement clean, maintainable components and deliver intuitive user experiences. You will participate in code reviews, uphold coding standards, troubleshoot UI issues, and support continuous improvements across the application stack. Your technical expertise, problem‑solving skills, and attention to detail will play an important role in delivering secure, scalable, and reliable front‑end solutions for our customers.
What you’ll do:
• Build responsive, high performance user interfaces using Node.js, React, JavaScript, TypeScript, HTML, and CSS
• Develop modular, maintainable UI components aligned with modern front end engineering practices
• Integrate front end applications with backend .NET services using REST APIs, JSON, and XML
• Implement client-side state management and optimize rendering for scalable, enterprise-grade applications
• Collaborate with UX/UI designers and backend engineers to ensure seamless end-to-end functionality
• Participate in code reviews and enforce standards for readability, quality, and maintainability
• Use Git and GitLab for version control, branching strategies, and merge request workflows
• Ensure front end applications meet accessibility, security, and performance requirements
• Troubleshoot and resolve UI issues across environments and browsers
• Work within AWS cloud-hosted environments and support deployments as part of the overall delivery team
What you’ll need:
• 8 years of software engineering experience
• 3 years of experience developing modern front-end applications using React, Node.js, JavaScript, and TypeScript
• Hands-on experience building UI components with HTML, CSS, and responsive design techniques
• Experience integrating with REST APIs and working with JSON and XML data formats
• Familiarity with Node.js for development tooling, build processes, or backend integration tasks
• Proficiency with Git and GitLab for source control, versioning, and collaboration
• Ability to work within cloud environments, preferably AWS, as part of a full-stack delivery pipeline
• Strong understanding of front-end performance optimization, browser behavior, and debugging
• Ability to collaborate with cross-functional teams and communicate technical concepts clearly
Bonus points if you have:
• Experience with YAML and CI/CD pipeline development (GitLab CI preferred)
• Exposure to .NET ecosystems and how front-end applications integrate with backend services
• Experience with automated testing frameworks for UI (Jest, React Testing Library)
• Familiarity with accessibility standards (Section 508, WCAG)
• Experience supporting cloud-native architecture in AWS
Clearance:
Must have an active Top-Secret clearance and be eligible for SCI.
Security Clearance requirement:
Must possess active TS/SCI clearance to be considered for this role.
Other Requirements:
U.S. Citizenship
Compensation Spotlight:
For this role, our typical salary range starts at $125,000 and stretches up to $155,000. But here's the deal – we're not about capping your potential. We're committed to snapping up the best and brightest, and we're ready to put our money where our mouth is. So, if you're one of the rare exceptions to the status quo with the education, experience, and that extra something special, we're not afraid to go above and beyond to secure your talent. Because for us, it's not just about a salary. It's about the complete rewards package, the culture, and the opportunity to make a real impact.
Taking Care of the People Who Take Care of The Nation
Compensation : We offer highly competitive compensation that is consistently recognized by our employees as being generous!
Health & Retirement : We offer a comprehensive Health Benefits package and 401K Retirement plan so you can take care of yourself and your family... both now and in the future. Other health-related benefits include People Partners who will help you navigate both personal and professional worlds, as well as strong wellness related resources offered through our healthcare provider.
Education : Individual growth is a priority at NSI/Synergy ECP. Employees are encouraged to take advantage of our company-sponsored continuing education program so they can get their degree or that next certification needed to propel them towards the next level. Not sure what's best for your career plans, we'll help you navigate it all!
Work/Life Balance : A healthy work/life balance is essential for building and executing your work effectively at NSI/Synergy ECP, but it’s also necessary to allow you the room to pursue everything you want to develop in your personal life. We offer a generous Paid Time Off benefit and 10 paid holidays a year. NSI/Synergy ECP also provides flexible work options that work with your schedule and lifestyle.
Philanthropy: With the help of our amazing employees, NSI/Synergy ECP participates annually in building awareness, volunteering and contributing to dozens of organizations. We believe that giving back creates a sense of purpose, engagement, and fulfillment. Have a cause you are passionate about? We bet you'll find others here that care about it just as much!
NSI/Synergy ECP is committed to providing equal employment opportunities to all qualified individuals. Employment decisions are based on merit, qualifications, and business needs. We do not discriminate on the basis of race, color, sex, national origin, religion, age, disability, or any other status protected by applicable law.
- ...do their best work. This empowers us to build smarter solutions and deliver stronger results for our clients. As a Senior Drupal Front-End Developer you will use your exceptional web development skills and experiences to architect and lead the development of...SeniorFull timeVisa sponsorship
$120k
...Maximus is seeking an experienced Senior Front End Developer to join our team! The Senior Front End Developer provides subject matter proficiency for work described in the task. Responsible for providing analytical skills to support process improvement, specialized studies...SeniorRemote work- ...technologies which you would pitch and present to Senior Engineers to implement through the UI... ...recommendation. You are excited at the end of the day when you made someone else’s... ...business requirements prototyping a working front-end. Qualifications HTML,UI/UX,...SeniorFull time
$126.1k
...to make the world a better place. We hire top-notch talent to develop and launch compelling, inventive communications campaigns,... ...the long term. That's where you come in. We’re looking for a senior front-end developer. You'll take a leadership role in building modern,...SeniorFull timeWork visa2 days per week- ...DescriptionUSM Business Systems Inc. is a quickly developing worldwide System Integrator, Software... ...development expertise to implement GUI front-end and middleware for financial modeling... ...of complex data which provides senior management the results to set corporate...SeniorWorldwide
$99k - $225k
AI Front-End Developer, SeniorThe Opportunity: GRACE is ARPA-H's production AI assistant. We've shipped the first generation of agentic AI,... ...fast and owns what we build end-to-end. We are looking for a senior front-end-leaning full-stack developer to own the experience...SeniorFull timeContract workPart timeWork at officeLocal areaRemote work- ...planning, and adaptive decision-making. With a zero-trust security framework, seamless integration with legacy systems, and robust developer tools, Worldscape empowers rapid deployment of agentic applications that drive resilience and efficiency in sectors like logistics...SeniorFlexible hours
- ...Senior Frontend Engineer \\ \ Location: \\ Seattle, WA (On\-site \/ Hybrid)\ \ We... ...improving performance, reliability, and developer velocity \\ Setting the quality bar:... ...\\ ~ Experience working directly with end users or customers to shape product direction...SeniorFull timeWork experience placement
- ...Software Engineer (2+ years to Senior Levels) Locations:... ...Our engineer-led software teams develop technical solutions on an aggressive... ...have frequent interaction with end users to produce and deploy... ...are hiring : Exceptional front end engineering experts from diverse...SeniorFull timeFor subcontractor
- ...platform team builds the infrastructure, developer experiences, and financial workflows that... ...decade. About the Role We're looking for a Senior Frontend Engineer to lead development of... ...and perfecting designs, but in the end, you care about building reliable solutions...SeniorFull time
$141k - $225.6k
...mission that matters at a company where you matter.Your ImpactAs a senior engineer on the team, you will be intimately involved in... ...years of professional software development experienceExperience developing large-scale, consumer-facing web applications.Expertise in JavaScript...SeniorWork experience placement- ...Senior UI Developer - ReactJS Developing new highly responsive user-facing features using React.js. Building reusable components and frontend... .... Automated unit testing tools such as Jest, Jasmine and end-to-end testing tools such as Protractor, estCafe, Nightwatch,...SeniorFlexible hours
- Arlington, VirginiaOnsiteDirect Hire$120k - $150kA client is looking to bring on a Senior Software Developer frontend leaning to join their team. This team is based In Atlanta, Georgia and is in the office 5 days a week. You’ll be joining a Saas start-up project leading...SeniorFull timeWork at office
- ...Front-end-focused Senior Software Engineer (path to Staff Engineer) The Tight Embedded Accounting HQ is in Washington, DC, in the renowned... ...above responsibilities: ~3 to 10 years of experience developing software ~ Heavy/growing AI curiosity ~ Engineering background...SeniorWork at office
$191k - $253k
...Space, Networking, and Vehicle hardware, we craft cutting-edge, end-to-end systems that redefine mission success.ABOUT THE JOBAs a Frontend... ...of existing software services across Anduril, aiming to develop reusable components that contribute to success across multiple Anduril...SeniorFull timeWork experience placementImmediate startRemote work- ...Senior Frontend Software Engineer York Space Systems was founded... ...aerospace companies, specializing in end-to-end customer solutions and... ...required. Team size: 6-8 developers Remote Policy: Hybrid (4... ...~ Proficiency with common front-end tooling such as Yarn, Babel...SeniorWork at officeLocal areaRemote workWorldwide
- DescriptionFull Stack Developer*FULL TIME ONSITE!* (Washington, DC or Winchester, VA)HighPoint... ..., while also developing robust back-end solutions.KNOWLEDGE AND SKILLS REQUIREMENTS... ...visualization, and interactive features using modern front-end frameworks (e.g., React, Angular, Vue...Full time
$165k
...highly cleared engineers, analysts, and program managers represent some of the best talent locally available. The Senior Full Stack Developer is responsible for the design, development, testing, and management of application development projects in support of IT...SeniorFull timeFlexible hours- ...Principal to lead long-term transformational engagements with senior executives. The role demands a proven record of managing large... ...MBA. This position requires travel up to 75%. Join this firm to make a significant impact while developing as a leader. #J-18808-Ljbffr...Senior
$200k - $240k
...Sought notices in support of IC and DoW programs Author and develop technical volumes, white papers, and solution narratives from concept... ...and proposal development lifecycles Ability to develop end-to-end technical solutions across complex, multi-disciplinary problem...Senior- ...Company Description USM Business Systems Inc. is a quickly developing worldwide System Integrator, Software and Product Development,... ...development and business keenness. Job Description Job Title: Front End Developer with 508 Compliance experience Location:...Full timeContract workRemote workWorldwide
- ...collaborate with both Product and Marketing teams to design and develop new UI/UX for various client products, including our Ad Server,... ...Requirements 2-4 years of strong experience with multiple front-end technologies including: HTML 5, CSS3, JavaScript, and jQuery...Full timeWork experience placement
- ...Senior Director, Principal Gifts About the Company Philanthropic organization supporting Indigenous culture & individuals Industry Non-Profit Organization Management Type Non Profit Founded 2017 Employees 11-50 Categories...Senior
- ...Description The work Front-End Developers build the browser experience people use to understand information and complete work. Working in modern component frameworks such as React, they translate user and product needs into components, interactions, forms, navigation...Full time
$110k - $135k
...video: Job DescriptionJoin the growing Warfare Systems Business Group at HII-Mission Technologies! We are seeking a Full Stack Front-End Developer Mid-level (Software Development Analyst) to support the Defense Security Cooperation Agency (DSCA), Office of the CIO. In...Full timeWork at officeLocal areaWork from homeWorldwideHome office$130k - $170k
...We are seeking a Senior Full-Stack Developer with a strong background in building and architecting complex, data-driven systems. In this role,... ...applications using Microsoft .NET, C#, ASP.NET, MS SQL Server, and front-end frameworks such as Angular or similar. Build and...SeniorFull timeCasual work- ...FOR AN ONSITE, PANEL WITH WHITE BOARD INTERVIEW Job Title: Senior Front-End Engineer Location: Hybrid reporting to Vienna or Winchester... ...standards and best practices. Responsibilities Design, develop, and maintain responsive, accessible, and performant web...SeniorContract workLocal areaMonday to Friday
$69.4k - $158k
UI Full Stack Software DeveloperThe Opportunity: As a full stack developer, you can resolve a problem with a complete end-to-end solution in a fast, agile environment. If you’re looking for the chance to not just develop software, but to help create a system that will...Full timeContract workPart timeWork at officeLocal areaRemote work$135k
...Senior Front-End Engineer ABOUT THE POSITION #128205;Remote | #128188;Full-Time | #128176;Starting at $135K Jeenie® is... ...front-end technical discussions, code reviews, and mentor other developers. Champion best practices in accessibility (WCAG),...SeniorRemote jobFull time- Responsibilities Join a collaborative team of 8 multi-disciplinary science & technology, legal, and security professionals who are on a mission to advance the economic security priorities of OUSW(R&E) and the United States. Shape the policy and enforcement landscape of...SeniorWork at office
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Senior Front-End Developer. Be the first to apply!
- react front end developer Washington DC
- frontend developer Washington DC
- remote front end web developer Washington DC
- senior frontend developer Washington DC
- entry level front end developer remote Washington DC
- front end developer contract Washington DC
- front end developer internship remote Washington DC
- front end engineer Washington DC
- senior front-end developer Washington DC
- front end web developer Washington DC



