Senior Full Stack Engineer
$140k - $160kECS Limited
Senior Full Stack Engineer
Everforth ECS is seeking a highly skilled Senior Full Stack Engineer to remotely or in the Washington, DC metro area with extensive experience in designing, building and maintaining large scale API's for enterprise level applications in support of the Department of Homeland Security. Tools necessary for excelling in this role include Java (with Maven, Gradle, etc), JavaScript Frontend frameworks (React, Angular, etc), Elastic and other data sources, and DevSecOps in the Cloud.
This role will focus heavily on modernizing legacy systems with deprecated code bases, requiring both technical expertise and creative problem-solving abilities. You will play a critical role in rearchitecting our application's API infrastructure, ensuring scalability, reliability and long-term maintainability.
Key Responsibilities:
- Support the design and architecture of robust, scalable API's for large enterprise level applications.
- Integrate and operate CI/CD pipelines used for building and releasing code and container images.
- Assess and refactor deprecated code bases implementing best practices for modernization and performance improvement.
- Collaborate with engineers to integrate React-based user interfaces with scalable APIs, leveraging React expertise to enhance API interactions, support legacy system modernization, and ensure seamless functionality and optimal user experience.
- Provide solutions for legacy system migration while minimizing system downtime and operational risks.
- Identify and resolve technical debt in older systems while transitioning them to modern Java frameworks and tools.
Salary: $140,000 - $160,000
General Description of Benefits
- Must have US citizenship.
- Ability to pass a Public Trust investigation.
- Bachelor's degree in a related field.
- Minimum 10 years of general work experience.
- 8+ years with Java (8 and beyond) with strong experience in legacy system modernization.
- 5+ years developing responsive web apps using React, Redux, and modern JavaScript.
- Strong background in API development, including 5+ years building RESTful microservices and service-oriented architectures.
- 3+ years of experience with CI/CD pipelines and deploying/operating in AWS or Azure Cloud environments.
- 3+ years of experience with Springboot or other stateless Java frameworks
- 3+ years developing applications in a production setting and troubleshooting complex issues within legacy environments and proposing effective solutions.
- Solid understanding of Git, version control workflows, and collaborative development practices.
- Familiarity with CX and UI/UX principles and their application in modern software design.
- Excellent communication skills with the ability to explain technical challenges and solutions to non-technical stakeholders.
- We're committed to bringing passion and customer focus to the business.SummaryLocation: New York, NY; Waltham, MA - Headquarters; East Norriton, PA; Princeton, NJType: Full timeSeniorFull time
- ...Senior Software Engineer engaged in the design and development of cloud hosted IoT platform and services for Genie’s connected products. Primary duties will be to lead, architect, design and develop microservices and APIs for cloud hosted platform supporting Genie’s connected...SeniorFull time
- ...We are looking for an exceptional, broadly experienced software engineer to join the Entefy team, building a full stack application from frontend to backend services with multiple databases to make things interesting. Can you wear many hats? If so, at Entefy, you can help...SeniorRemote jobFull time
- THE GLOBAL LEADER IN DATA & ANALYTICS RECRUITMENTHarnham Search and Selection Company Number: 05723485Harnham Search and Selection is a registered company in England and Wales. Reg no. 05723485Harnham Europe Limited Company Number: 09956940Harnham GmbH HRB: 196954Harnham...SeniorWork at office
- ...Now As our customer base and technical stack expand, we’re entering a new phase of platform development. We need a senior engineer who can both lead and build —owning architecture... ...and implement scalable systems across our full stack (Python, TypeScript, SQL) ~...SeniorFull timeFlexible hours
- ...Mission - We are looking for Mid-level and Senior Software Engineers to join a great team and succeed in... ...you like understanding each part of a stack and the models that apply to it?... ...about coding and willing to build the full structure of a B2B enterprise software...SeniorRemote jobFull timeWork at officeWorldwideFlexible hoursDay shift
$150k - $220k
...grade features end to end. You’ll work closely with designers, engineers, and product leaders who care deeply about the craft of... ...solving meaningful problems. ~6+ years building and shipping full-stack web apps - experience with Next.js, React, TypeScript, or PostgreSQL...SeniorFull timeWork at office$140k - $180k
...Wanna join the adventure? Loft Orbital is looking for a Senior Full‑Stack Engineer to join our Oort team. Oort is our central web platform—a unified environment that consolidates all infrastructure data and tools, empowering Loft to streamline, integrate,...SeniorFull time$80 - $85 per hour
Senior Full Stack Engineer Remote 6 months (Likely to extend) $80-85/hr. In this role, you'll help develop the next generation of assessment and testing solutions using modern technologies. You'll work with innovative Agile teams across the full technology stack to build...SeniorRemote work- ...US or Canada Type: US Applicants - Full-Time; Canadian Applicants - Independent... ...who push us forward. Across strategy, engineering, design, data, and operations, we seek... ...software engineering. We’re seeking a Senior Full-Stack Engineer to join our growing team. In...SeniorFull timeFor contractors
$185k - $210k
...beautifully designed technologies that keep food in the food system and out of landfills. We are seeking a highly skilled Senior Full Stack Engineer to join our engineering team. This is an individual contributor technical leadership role reporting to the Director of...SeniorFull time- ...sustainable. About the role: As an early engineer, you'll receive generous equity compensation Full-time role at our San Francisco, CA office Flexible... ...You are comfortable working on all parts of the stack. Bonus Points: Prior experience building web...SeniorFull timeWork at officeFlexible hoursWeekend work
$180k - $230k
...customers, working on cutting-edge 100,000-pound autonomous robots, engineering intricate systems at the intersection of hardware, software,... .... About the Role Own and professionalize Teleo's full-stack platform. Unify fragmented internal tools and customer-facing...SeniorFull timeWork at officeRemote work$130k - $180k
Austin, TX • Chicago, IL • Denver, CO • Phoenix, AZ Full-time $130k - $180kPosted 11/01/2022If you are a Senior Full-Stack Engineer with experience in TypeScript/NodeJS and React, please read on! Located in the rapidly growing city of Austin, TX, we are a startup, software...SeniorFull timeRemote workWork from homeFlexible hours$150k - $180k
...continue working together effectively. For those who reside full-time in NYC, SF, or LA: we have a hybrid work policy of... ...do at EDO, please visit EDO Press . The Role As a Senior Full Stack Engineer at EDO, you will write software that presents our world-class...SeniorFull timeWork experience placementWork at officeImmediate startRemote workFlexible hoursShift work$70 - $80 per hour
...startup - their main goal is to increase productivity and potential for the industrial supplychain. They are looking for a Senior Full Stack Engineer who is experienced with ReactJS and NodeJS. Responsibilities Work Full Stack with ReactJS/NodeJS/Python Help develop/...SeniorFull timeTemporary workFlexible hours- PLEASE CLICK HERE TO SEE *ALL* OF OUR JOB OPENINGS!Senior Full Stack Engineer (Backend)As a Senior Full-Stack Engineer, you'll be a key player in building the technology platform that delivers these insights, working with cutting-edge algorithms and composite AI solutions...SeniorCasual workWork at office
$140k - $200k
...all of it, we build with AI. We expect senior engineers to use AI tooling fluently across the software... ...resolve production issues across the stack, across modern and legacy code.Required... ...-on experience building and shipping full-stack web applications to production. Fluency...SeniorFlexible hours$140k - $160k
Job DescriptionEverforth ECS is seeking a highly skilled Senior Full Stack Engineer to remotely or in the Washington, DC metro area with extensive experience in designing, building and maintaining large scale API's for enterprise level applications in support of the Department...SeniorWork experience placementRemote work- ...We’re seeking a skilled Forward Deployed Full-Stack Engineer to build the next-generation data management and artificial intelligence platform for maritime domain awareness. As a forward-deployed engineer, you’ll work on-site with customers — writing code, integrating...SeniorFull timeLocal areaHome officeRelocation packageNight shift
$70 - $80 per hour
DescriptionKforce has a client in Armonk, NY that is seeking a Senior Full Stack Engineer.Summary:Our client, a leading organization in the utilities industry, is seeking an experienced Senior Full Stack Software Engineer to join a high-performing engineering team responsible...Senior- Job-ID28986922Reference26-21531Remote100% RemotePosition Title: Senior Full Stack Engineer Location: Remote Duration: Contract to Hire Profile: Seek full stack SEs with strong (Advanced+) REACT/NODE/LAMBDA and microservices experience. Must be familiar with Agentic...SeniorContract workWork experience placementRemote work
$192k - $263k
Foster City, CASoftware - Autonomy Software /Full-time /HybridThe HD Mapping team is seeking an experienced full-stack engineer to lead development of the web services that support the creation, cataloging, and maintenance of 3D HD maps deployed across Zoox’s fleet. This...SeniorFull timeRelocation package$166.6k - $208.3k
...through the skies. It embodies the elegance of simplicity in engineering, transforming the demanding task of controlling an aircraft... ...product engineering group is growing and we’re looking to hire senior full-stack engineers. We’re a team of pragmatic, product-minded...Senior- Job ID: 25905864Reference Number: 25-00790Title: Senior Full Stack Engineer with Rule Engine and API development (Node.js, Java, Drools,)Location: Nashville, TNPosted Date: 2025-07-16Contact: Mahi MahiContact Email: ****@*****.*** Phone: (609) 701-801...Senior
- ...Reference26-01339TypeDirect PlacementSalary$115,000 / year Software Guidance & Assistance, Inc., (SGA), is searching for a Senior Full Stack / Backend Engineer for a full-time assignment with one of our premier media analytics and advertising technology clients. This is a...SeniorFull timeRemote work
- Bachelor’s degree or foreign equivalent in Computer Science, Mechanical Engineering, or related field and 10 years of progressive post-baccalaureate experience in the job offered or related occupation.5+ years of hands-on experience with NoSQL database management systems...Senior
$170k - $240k
...where impact drives revenue.About the RoleWe’re hiring a Senior Fullstack Engineer who wants to build consumer products at meaningful scale with... ...HaveExperience5+ years building and maintaining complex full-stack systemsExperience in startup or high-ambiguity environmentsStrong...SeniorShift work- ...streamlined digital experiences.As a Software Development & Engineering Senior, you will play a key role in advancing a platform that directly... ...and automated deployment processesAbility to support the full software development lifecycle (SDLC) from design through productionExperience...SeniorFull timeWork at office
- ...large models directly to consumer hardware without removing information from the model.About the RoleWe are looking for a Senior Full Stack Engineer to drive the development of high-performance web and desktop applications while ensuring scalability, maintainability,...SeniorLive outWork at officeLocal area
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Senior Full Stack Engineer. Be the first to apply!
- full stack engineer United States
- senior java full-stack developer United States
- full stack java developer United States
- java full stack angular developer United States
- full stack php developer United States
- junior full stack developer United States
- senior full stack web developer United States
- mean stack developer United States
- entry level full stack developer United States
- junior full-stack web developer United States

