Source Job

$137,871–$172,339/yr
US Canada Unlimited PTO

  • Building tools for teachers to use Khan Academy as a strategic supplement in their classrooms.
  • Integrating state of the art learning science into our product to enable students and teachers identify and address literacy skill gaps.
  • Harnessing the power of AI to deliver product capabilities.

Go GraphQL TypeScript React AI

20 jobs similar to Senior Fullstack Engineer I

Jobs ranked by similarity.

Canada

  • Build, design, improve, and debug complex product features and their underlying systems.
  • Write extensible, scalable and test-driven code.
  • Collaborate with team members on designing scalable, well tested, and well documented web architecture, including APIs and backend systems.

StackAdapt empowers marketers to reach, engage, and convert audiences with precision. They are known for their diverse and supportive workplace and have been recognized as a top software and marketing product.

US

  • Lead and mentor a team of 3-4 talented engineers within full-stack web engineering.
  • Act as a hands-on manager and participate in project design and implementation.
  • Plan and architect scalable web APIs and backend systems, and build UI components.

StackAdapt empowers marketers to reach, engage, and convert audiences with precision using their AI-powered marketing platform. They seamlessly connect brand and performance marketing to drive measurable results. They are known for a diverse and supportive workplace.

$137,700–$182,426/yr
US

  • Contribute to building innovative software solutions for a global user base, focusing on localization and internationalization.
  • Collaborate with engineers, designers, and product managers to deliver high-quality features that leverage AI technologies.
  • Mentor other engineers, influence application architecture, and participate in on-call rotations to support platform reliability.

This position is posted by Jobgether on behalf of a partner company.

US

  • Collaborate with product managers, designers, and other engineers to understand requirements and translate them into working software.
  • Design, build and ship full-stack features across frontend and backend services.
  • Own services end‑to‑end: technical design, implementation, testing, observability, SLOs, incident response, and iterative hardening.

Reddit is a community of communities, built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. With 100,000+ active communities and approximately 116 million daily active unique visitors, Reddit is one of the internet’s largest sources of information.

$163,000–$247,000/yr
US Canada

  • Architect, build, and test Gusto’s product suite that spans across Payroll, Benefits, HR, Time, Tax Credits, and more.
  • Mentor other engineers to help solve some of the hardest technical problems out there in very complex domains and at a large scale.
  • Collaborate with Product Management and Design teams to understand customer pain points and iterate to launch daily.

Gusto is on a mission to grow the small business economy by handling payroll, health insurance, 401(k)s, and HR for over 400,000 small businesses.

$88,200–$151,200/yr
Poland

Leads the AI roadmap from concept to production. Builds production-ready, accurate, and reliable AI agents. Continuously improves performance of AI solutions.

Symbe is an innovative business intelligence startup that automates business case creation for sales teams, helping them effectively demonstrate value.

$125,000–$145,000/yr
US

  • Building out new and enhancing existing internal tools, consumer facing websites & newsletter experiences
  • Collaborating with Product Managers, Product Designers and other engineers to plan, design and implement business requirements
  • Proposing and implementing new tools and technologies to accomplish product objectives

Morning Brew Inc. mixes what you need to know with its unique brand of wit to attract, and build real relationships with, the next generation of business leaders. The Morning Brew team is clever, creative, and growing fast.

India

  • Design, implement, and scale backend services in .NET Core and front-end applications.
  • Design and evolve highly scalable, reliable systems for high-traffic environments with strong observability and extensibility.
  • Collaborate closely with Product, Design, and Data from discovery through launch to deliver impactful features.

JustAnswer is the leading AI + Human professional services platform, on a mission to revolutionize how people access expert help. JustAnswer has a 200+ engineer organization that delivers at pace and fosters a positive, collaborative culture focused on learning, impact, and continuous improvement.

$120,000–$140,000/yr
US Canada 3w PTO

  • Work with Design and Product teams to build a web UI that is beautiful, performant, and well-engineered.
  • Architect and build the backend/API to optimize for performance, growth, scalability, ease of future development, and code quality.
  • Write unit, functional, and integration tests to ensure maximum code and product quality.

The Athletic brings sports fans the most comprehensive stories about the teams, sports, and athletes they love, powered by one of the largest global newsrooms in sports media. The Athletic has a newsroom of 500+ full-time staff and delivers in-depth coverage of hundreds of professional and college teams.

US Unlimited PTO

  • Build AI-focused user interfaces.
  • Own the frontend architecture and component library.
  • Create responsive, accessible experiences.

Mento is a career technology company that helps people be exceptional and thrive at work through human, AI, and software-based coaching. They strive to create a fun, conscientious, collaborative, and supportive work environment and are a US-based, remote-first company, backed by leading VCs and angel investors.

Europe

  • Take ownership of complex product features end-to-end.
  • Translate product ideas and designs into pixel-perfect, production-grade UI.
  • Contribute to both backend infrastructure and frontend design system.

They are a fast-growing Series A startup in Europe. They value kind, collaborative, and hardworking people.

  • Design and build composable ERP modules that solve real operational problems.
  • Work across the stack - from GraphQL APIs and business logic to React frontends.
  • Create abstractions that balance flexibility with opinionated defaults.

Tailor is pioneering Headless ERP technology, offering a new way for growing companies to design internal workflows. They are a Y-Combinator backed startup that has recently closed their $37M USD Series A to accelerate the future of composable ERP.

$126,245–$168,327/yr
US

  • Contribute to both the technical and product roadmap.
  • Collaborate with product managers and engineers.
  • Mentor and support teammates.

TrueML is a mission-driven financial software company creating better customer experiences for distressed borrowers. They are building technology to serve people in a way that recognizes their unique needs and preferences.

US Unlimited PTO 20w maternity 14w paternity

  • Lead, coach, and develop a team of software engineers across multiple experience levels
  • Partner with senior engineers to guide system design, architecture, and technical decision-making
  • Own delivery for the Offers roadmap, ensuring predictable execution and high-quality outcomes

Fetch is a rewards app where millions of people earn rewards for buying brands they love. With investments from SoftBank, Univision, and Hamilton Lane, Fetch is reshaping how brands and consumers connect in the marketplace and fosters a people-first culture rooted in trust, accountability, and innovation.

$68,855–$112,910/yr
Canada

  • Design, build, and refine frontend experiences in AMO and DevHub, ensuring they are fast, accessible, and user-friendly.
  • Contribute to modernization and improvements in architecture and maintainability.
  • Help keep the platform safe and trustworthy, with attention to security and user trust.

Mozilla Corporation shapes the internet for the better. They are known for Firefox and have over 225 million users each month, focusing on AI, social media, and security.

Latam

Design and build scalable full-stack applications using Golang, Python, and React. Refactor and optimize existing systems to improve performance and maintainability. Contribute to building SaaS products powered by large-scale healthcare datasets.

Coderio designs and delivers scalable digital solutions for global companies, with a strong technical foundation and a product-oriented mindset.

Canada

Write clean, modular, extensible and well-tested code that supports long-term maintainability and scalability. Design, build, and debug complex distributed systems across the full stack. Collaborate with engineers to design scalable, well tested, and well documented web architecture, including APIs and backend systems.

StackAdapt empowers marketers to reach, engage, and convert audiences with precision through its AI-powered marketing platform.

US Unlimited PTO

  • Design, build, and deliver high-quality features that drive customer and business impact
  • Collaborate cross-functionally with product and design to turn complex problems into elegant, user-focused solutions
  • Balance iteration speed with long-term maintainability and system health

Fieldguide is modernizing how cybersecurity, privacy, and financial audits are done by building software that streamlines the work. They are a remote-first company headquartered in San Francisco, CA and value diversity of backgrounds and experiences, and they’re deliberate about building an inclusive, humble, and high-performing culture.

Europe 5w PTO

  • Responsible for writing efficient, well-structured, and maintainable code; setting an example for other engineers.
  • Provide technical guidance and help junior and mid-level engineers grow in their roles.
  • Integrate AI tools throughout the development lifecycle, with critical evaluation for security, performance, and maintainability.

Rithum accelerates how brands, suppliers, and retailers work together to deliver seamless e-commerce experiences through their platform. They are trusted by over 40,000 companies and represent over $50 billion in annual GMV.

$112,000–$187,000/yr
US Unlimited PTO

  • Developing key features and capabilities.
  • Shaping how wearable data is surfaced and used across Hudl.
  • Collaborating with a cross-functional team to deliver full-stack product features.

Hudl builds great teams, hiring the best to ensure employees learn from others. They provide a culture where everyone feels supported, becoming one of Newsweek's Top 100 Global Most Loved Workplaces.