Fullstack Software Engineer
Lever Test 11
Job Title: Senior Full Stack Software Engineer (React, MongoDB, TypeScript) Location: [Remote / Hybrid / On-site – specify] Employment Type: Full-Time Experience Level: Senior (5+ years) About the Role We are seeking a highly skilled Senior Full Stack Software Engineer to design, build, and scale modern web applications using React, MongoDB, and TypeScript. You will play a critical role in shaping architecture, mentoring developers, and delivering high-quality, performant software solutions. This role requires both deep technical expertise and strong collaboration skills. Key Responsibilities Full Stack Development Design and develop scalable, high-performance web applications using React (frontend) and Node.js (backend). Build and maintain RESTful and/or GraphQL APIs. Develop reusable, modular, and maintainable components using TypeScript across the stack. Implement responsive UI/UX designs with a focus on usability and performance. Backend & Database Design, implement, and optimize MongoDB schemas and queries. Ensure data integrity, security, and performance in distributed systems. Build robust backend services with proper error handling, logging, and monitoring. Architecture & System Design Lead system design discussions and contribute to architectural decisions. Optimize applications for maximum speed and scalability. Evaluate and introduce new technologies and best practices. Code Quality & Best Practices Write clean, testable, and well-documented code. Conduct code reviews and enforce engineering standards. Implement automated testing (unit, integration, end-to-end). Collaboration & Leadership Work closely with product managers, designers, and other engineers. Mentor junior and mid-level developers. Contribute to agile processes, sprint planning, and technical roadmaps. Required Qualifications 5+ years of professional experience in full stack development. Strong proficiency in: React (hooks, state management, component architecture) TypeScript (advanced typing, generics, interfaces) Node.js (Express or similar frameworks) MongoDB (schema design, aggregation pipelines, indexing) Experience building and consuming RESTful or GraphQL APIs. Solid understanding of HTML, CSS, and modern frontend tooling. Familiarity with version control systems (Git). Experience with cloud platforms (AWS, Azure, or GCP). Strong problem-solving skills and attention to detail. Preferred Qualifications Experience with Next.js or other React frameworks. Familiarity with microservices architecture. Experience with Docker and container orchestration (Kubernetes). Knowledge of CI/CD pipelines and DevOps practices. Exposure to testing frameworks (Jest, Cypress, Playwright). Experience with real-time technologies (WebSockets, event-driven systems). Soft Skills Excellent communication and collaboration abilities. Strong sense of ownership and accountability. Ability to work independently and lead initiatives. Mentorship and team leadership experience. What We Offer Competitive salary and equity (if applicable) Flexible work environment (remote-friendly) Health, dental, and vision insurance Generous PTO and paid holidays Professional development opportunities Collaborative and innovative team culture Success Metrics Delivery of high-quality features on time System reliability and performance improvements Code quality and maintainability Positive impact on team productivity and mentorship #J-18808-Ljbffr Lever Test 11
$125k - $175k
...A health and performance technology company is seeking a Software Engineer II to join their Business Systems team in Boston. In this role, you will design and maintain internal tools, ensuring the scalability and reliability of business operations. Candidates should have...Suggested$150k - $200k
...Fullstack Software Engineer (AI-Native) Cambridge, MA About Us Proton is building the AI operating system for wholesale distribution, embedded in the workflows that move nearly every physical product on the planet. Distribution is a $9 trillion industry, and the...SuggestedWork at officeFlexible hours3 days per week$100k - $145k
...Full-Stack Software Engineer Location: Boston, MA Open to Remote in EST or CST Locations About Us Clasp is a venture-backed, mission-driven startup transforming access to education and career pathways. We’re revolutionizing how employers attract and retain...SuggestedRemote workWorldwideFlexible hours$190k - $240k
...hidden fees or compounding interest. Consumer Growth Experience Engineering (CGX) builds the platforms and end‑to‑end experiences that... .../TypeScript. You have a total of 4+ years of experience as a software engineer. You are experienced in designing, developing, and launching...SuggestedRemote workFlexible hours- ...I did my part and supported the Regular Toilet is looking for a Software Engineer to join their team in Somerville, MA. In this hybrid role, you will contribute to exciting projects that improve the efficiency and quality of frontline operations using cutting-edge technology...SuggestedFlexible hours
$155k - $180k
...Full-Stack Software Engineer (Boston) Title of Role: Full-Stack Software Engineer (Boston) Location: Boston, hybrid Company Stage of Funding: Venture-Backed — Healthcare Office Type: Hybrid Salary: $155K–$180K Company Description We're representing...Work at office- ...Full Stack Software Engineer (XR Applications) Watertown, MA May 6, 2026 Job Description We believe general-purpose, generally-intelligent robots will be built in our lifetimes. Robots will work in our factories, move our goods, walk on our streets and eventually...Work at office
- ...Senior Full Stack Software Engineer Watertown, MA December 17, 2025 Job Description The Company: We believe general-purpose, generally-intelligent robots will be built in our lifetimes. Robots will work in our factories, move our goods, walk on our streets...Work at office
- ...Senior.NET Full Stack Engineer Manulife is a leading international financial services provider, helping people make decisions easier... ...Required Qualifications ~8+ years of experience in full-stack software development in enterprise environments. ~ Strong hands-on...Flexible hours
- ...Senior Full-Stack Engineer As a Senior Full-Stack Engineer at Cyvl, you will play a leading role in delivering intuitive, performant, and scalable applications for our customers. You'll be responsible for designing and building across the stack, from elegant, component...Immediate startFlexible hours
$160k - $210k
...About the Role A growing technology startup is hiring a Senior Full Stack Software Engineer to help build and scale its core product. This engineer will work across the frontend and backend, contributing directly to customer-facing features as well as internal systems...Remote workFlexible hours$100k - $150k
...Full-Stack Software Engineer This role is located in Somerville, MA – We are a hybrid work environment and are in the office 3+ days/per week. Tulip, the leader in AI-native frontline operations, is helping companies around the world equip their workforce with composable...Temporary workWork at officeLocal areaFlexible hours3 days per week- ...time and resources to explore new ideas, but always rooted in engineering best practices. As a result, we can innovate rapidly to produce... ...the details when it comes to UX. As a Senior Full-Stack Software Engineer, you will build AI-centric web applications in TypeScript...Temporary workWork at officeWorldwide
$140k - $150k
...Description WHO ARE YOU? You bring strong backend and full stack technical expertise to your work as a Senior Software Engineer. You thrive in a collaborative, fast-moving development environment, and are motivated to ensure your work has a positive impact. WHO...Work at officeRemote workRelocation package$107.45k - $199.55k
...anywhere you want to go. We are seeking a Senior .NET Full Stack Engineer to build and deliver scalable, enterprise-grade digital... ...Required Qualifications ~8+ years of experience in full-stack software development in enterprise environments. ~ Strong hands-on...Temporary workLocal areaFlexible hours$10k
...building the world’s highest-fidelity bioprocess simulation software to help life‑saving therapies reach patients faster. By... ...from the lab to the world. About the Role Ark is seeking a Fullstack Software Engineer to join our fast‑moving startup tackling some of the hardest...Full time- ...environment that values curiosity, innovation, and a bit of fun along the way. ️What we're looking for We’re looking for a Full-Stack Engineer to help build and scale Remark’s platform. You’ll work across the stack, touching both the backend and frontend, to create a...Work at officeWork from homeFlexible hours2 days per week3 days per week
- Blink Charging Inc in Boston, Massachusetts is hiring Software Engineering Interns to work on their Energy Management System, optimizing EV charging operations. Ideal candidates are computer science students knowledgeable in TypeScript and React. Interns will develop features...Internship
$130k - $175k
...processing, and data discovery, to drive progress at S&P Global and its customers worldwide. Position Overview As a Full‑Stack Software Engineer II, you will build AI‑centric web applications in TypeScript ranging from experimental PoCs to flagship products. You will...Work at officeWorldwide$90k - $190k
...human and artificial intelligence to lead the charge. As an AI software company who deploys its inventions directly into the facilities... ...ordinary robots to achieve extraordinary things. As a platform engineer, your work lies at the center of this challenge, orchestrating...Work at office- ...company and its technology. You will report to Tristar AI's Head of Engineering. This is a hybrid role based out of our Kendall Square office... ...specific needs. Qualifications BS degree in Computer Science, Software Engineering, Data Science or related technical fields. 2+...Work at officeFlexible hours
$111.5k - $176.5k
...drives positive impact to join our team. What You'll Do Join Viasat Government - Secure Network Systems (SNS) as a full‑stack software engineer developing networking and cyber security products for diverse customers. You will join a dynamic, multi‑functional team that...- A tech company is seeking an experienced Fullstack Developer to design and develop scalable cloud-native applications. The ideal candidate will have strong proficiency in TypeScript and Python, with hands-on experience in AWS services. Responsibilities include developing...
$130k - $175k
Full-Stack Software Engineer II Location: Cambridge, Massachusetts, United States. Base salary range: $130,000 - $175,000. Eligible for an annual incentive bonus and equity plans. What You’ll Do Build full-stack and SPA TypeScript applications ranging from experiments...Work at office- A healthcare technology startup is seeking fullstack software engineers to join their team in Cambridge. The role involves collaboration with the CTO to develop foundational systems aimed at improving healthcare's financial infrastructure. Candidates should have 0-7 years...
$102.5k - $187.9k
...intelligent systems. Our teams span digital strategy, architecture, engineering, design, operations, and applied AI across a wide range of... ...your story. The opportunity As a Senior Full Stack Software Engineer , you will independently develop, test, and maintain...Summer holidayLocal areaFlexible hours- ...Senior Full-Stack and Platform Software Engineer Join our world-class engineering team and collaborate with talented cross-functional partners to revolutionize software testing. You will play a pivotal role in building intuitive solutions that empower customers to identify...Work at officeRemote workFlexible hours
$145k - $180k
...Fullstack Engineer We're looking for a Fullstack Engineer to work on LangSmith, our commercial AI observability and evals platform product... ...be successful in this role: ~2+ years of experience in software engineering working on complex platform products ~...Work at officeFlexible hours$175k - $240k
...Senior Fullstack Engineer In person 5 days/week in San Francisco We're looking for a Senior Fullstack Engineer for our commercial product... ...code What You Bring ~5+ years of experience in software engineering working on complex platform products ~...Work at officeFlexible hours$165k - $180k
...offered by a variety of different vendors. As a Senior Fullstack Engineer for the e-commerce PlatformTeam , you will help advance our... ...You have a history of contributing to reliable and scalable software projects Experience with one or more of the following is...Work experience placementWork at office3 days per week
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