Source Job

Global

  • Own the technical direction for internal tools, including architecture, design systems, and engineering standards.
  • Build end-to-end features across front-end and back-end, applying ranking and recommendation techniques.
  • Mentor engineers through pairing, code review, and detailed specs, while driving down technical debt.

JavaScript TypeScript Node.js React PostgreSQL

20 jobs similar to Senior Full-Stack Engineer, Internal Tools

Jobs ranked by similarity.

US

  • Define front-end architecture and technical strategy for complex UI systems using React, Angular, Next.js, TypeScript.
  • Lead back-end development and API architecture, integrating systems with Node.js, Python, PostgreSQL, MongoDB.
  • Drive monitoring, observability, and reliability practices while mentoring engineers and setting engineering standards.

Robots & Pencils is an applied AI engineering firm building AI co-workers for enterprise operations. Founded in 2009 with delivery centers globally, we are a smaller, faster, senior team averaging 15+ years of experience, known for being a nimble alternative to traditional systems integrators.

US

  • Take end-to-end ownership of features and products across the stack, from interfaces to backend infrastructure.
  • Work closely with product, design, operations, and finance to gather requirements, prototype quickly, and ship with confidence.
  • Own features from first prototype through launch, iteration, and beyond.

Agora is building stablecoin infrastructure, including AUSD and a full-service platform for issuing, managing, and integrating stablecoins. It is a small, mission-driven startup backed by Paradigm and Dragonfly, with a culture of high ownership, clear thinking, and high-velocity decision making.

$115,000–$195,000/yr
US Canada Unlimited PTO

  • Design, develop, and maintain features across the stack with a focus on scalable architecture and performance.
  • Write clean, efficient, well-documented code in TypeScript/JavaScript, contributing to React Native mobile app and backend services.
  • Participate in technical design discussions, lead by example through code reviews, and mentor early-career engineers.

Roo is a veterinary staffing platform that connects animal healthcare professionals with animal hospitals for relief work and hiring. They have a network of over 20,000 veterinary professionals and serve 9,000 animal hospitals, with a culture of bias to urgency and measurable impact.

Global

  • Build and maintain features across React/TypeScript frontend and NestJS/TypeScript backend, including UI, REST APIs, and data layers.
  • Design client-server architecture with state management, routing, authentication, real-time WebSocket updates, and AWS SQS background job processing.
  • Collaborate on integration between web app and LLM-based agents for message schemas, queue communication, and file/data handoff.

InsightRX builds a platform combining web applications with conversational AI to support pharmacokinetic/pharmacodynamic analysis and clinical trial workflows. Their team focuses on pharmaceutical R&D decision-making tools, though no specific size or culture data is provided.

LATAM

  • Reverse-engineer data rules and functional prototypes from spreadsheets into reliable web applications.
  • Take features from database schema design to backend API and modular, responsive UIs using React/Next.js & Tailwind.
  • Integrate LLM APIs into production workflows to automate operational narratives and extract structured insights.

Launchpad Technologies Inc. is a global technology partner connecting top talent with high-impact projects across North America and beyond. They specialize in Staff Augmentation and product development, with a people-first culture built on trust, autonomy, and impact.

US

  • Develop and deliver full-stack AI-powered applications on Unframe's platform.
  • Work closely with customers and internal teams to tailor solutions.
  • Write clean, tested, and maintainable code.

Unframe is an AI-first startup helping large enterprises deploy LLM-powered applications quickly. With over $100M in total contract value secured in 12 months and a recent $50M Series B, the company is scaling globally alongside Fortune 500 customers.

$200,000–$215,000/yr
US Unlimited PTO

  • Serve as the engineering anchor for a greenfield TypeScript monorepo, owning architecture and technical direction.
  • Write production code daily across the full stack, including Express, MikroORM, React, and PostgreSQL.
  • Set engineering standards, mentor the team, and grow into the technical lead as the platform scales.

Leap is on a mission to transform the home improvement industry by building technology that helps contractors work smarter and scale faster. They are recognized on the Inc. 5000 list for 5+ consecutive years, foster a transparent and supportive culture, and maintain a strong eNPS score through regular employee feedback.

Global

  • Develop complex, scalable full-stack solutions using Node.js, React, and TypeScript.
  • Implement automated testing (TDD), CI/CD, and best engineering practices in a cross-functional team.
  • Collaborate with UI/UX designers to build exceptional data products ensuring usability and technical excellence.

SunnyData is a leading Databricks technology partner that empowers customers with scalable architectures, data engineering pipelines, and ML/AI applications. The company is committed to diversity and inclusion, and offers opportunities for career growth in a collaborative culture.

Global

  • Develop, test and iterate on product features spanning frontend, backend, and cloud infrastructure.
  • Work closely with product, design, QA, and business teams to translate requirements into production-ready features.
  • Design and build integrations with third-party services such as social media, eCommerce, and AI.

We are a VC-funded creator marketplace app connecting eCommerce brands with everyday social media users. We are a high-growth, remote-first startup that offers a flexible 4-day work week.

$140,000–$220,000/yr
US

  • Develop frontend and backend features for Akash Console
  • Build and maintain public APIs and SDKs for partners
  • Work on automated tests and CI/CD automation

Akash Network is developing the world’s first decentralized cloud computing marketplace, enabling any data center to become a cloud provider by offering unused compute cycles. They are a remote-first, distributed team of open source and blockchain developers from leading technology companies.

$91,000–$120,000/yr
United States Unlimited PTO

  • Craft client code that is efficient, performant, testable, scalable, secure, and of the highest quality.
  • Provide accurate status tracking, reporting, and estimation using project methods and tools.
  • Collaborate with fellow engineers, designers, and managers to understand user pain points and iterate on solutions.

3Pillar is an AI transformation partner that helps enterprises build AI-native products and intelligent agents. With teams across North America, Europe, Latin America, and Asia, the company fosters a remote-first culture focused on well-being, global collaboration, and career growth.

$110,000–$140,000/yr
US

  • Build and ship features across a TypeScript/React front-end and Python/PostgreSQL back-end.
  • Develop analytics functionality that turns business data into dashboards and reports.
  • Own technical design, write tests, and investigate production issues.

CelebriOS is a software company building B2B SaaS products that help businesses make better decisions, streamline operations, and get more value from their data. As a growing remote-first team, we focus on usability, reliability, and measurable impact in everything we build.

Europe

  • Design and implement full-stack features using Node.js, React, and React Native.
  • Own the mobile app end-to-end, working directly with engineering and product leadership.
  • Contribute to a consumer-first, test-driven development culture with A/B testing and PLG.

SimpleStudy is a consumer AI platform for exam preparation, described as 'Duolingo for exam prep.' The company is post-seed with 1.5M+ students, ~20 people, lean and product-obsessed.

Global

  • Design and ship core AdManager features for campaign setup, reporting, and creatives management, owning initiatives end-to-end with minimal supervision.
  • Build advertiser-facing interfaces using Next.js, React, and TypeScript, and design scalable APIs and database schemas for advertiser workflows.
  • Instrument new features with monitoring, logging, and alerting, debug production issues, and contribute to incident response with clear ownership.

Vibe.co provides an Audience First Streaming TV Advertising solution for marketers to unlock TV as a growth channel. Trusted by over 10,000 brands, the company hit a $100 million revenue run rate in under two years and operates with a high-performance culture centered on Impact, Ambition, and Urgency.

Global

  • Build full-stack features across React, React Native, and Node.js, including AI chat UI and workflows.
  • Design and implement AI systems such as tool-using agents, RAG, and human-in-the-loop flows.
  • Ensure system reliability, scalability, and performance while mentoring team members.

WorkHero is building the AI-powered back office for the skilled trades, starting with the HVAC industry. They are a small, senior team with deep experience in AI, product, and the trades.

Utah Unlimited PTO

  • Partner with cross-functional teams to define and validate new features end-to-end.
  • Build user-facing experiences in JavaScript/TypeScript and React that delight customers.
  • Design and implement REST API endpoints and microservices using Python or Java, backed by PostgreSQL.

Canopy is a fast-growing SaaS company building simple, powerful software for accounting firms. We place a strong emphasis on delighting our customers, spotting and solving problems, and being good people along the way.

  • Build full-stack web features from front-end to back-end with real ownership.
  • Own your work from inception to launch, including iterating with customers post-launch.
  • Hold yourself accountable to high standards of quality in a fast-moving startup environment.

Meow provides startups with business accounts, corporate cards, and clean financial reporting to operate and raise capital. They are a small, fast-moving startup that combines financial infrastructure with hands-on support for global customers.

US

  • Write quality software, participate in code reviews, and develop best practices and documentation.
  • Support full-stack systems design decisions involving API architecture, data models, and UI component structure.
  • Build intuitive front-end experiences using React and clean back-end services using Express.js and Prisma ORM.

LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed, bringing commercial-grade platforms and mission-ready AI to federal agencies. Headquartered in Tysons, Virginia, the company serves defense, space, healthcare, and energy sectors with a focus on agility and collaboration.

$155,000–$195,000/yr
US

  • Design and build new products, developing high-performance backend services in Node/Go and intuitive React frontends.
  • Optimize SQL databases, design gRPC and REST APIs, and integrate with LLM/AI services for intelligent features.
  • Mentor developers, participate in architecture discussions, and advocate for engineering quality and team culture.

GoGuardian provides award-winning learning solutions for K-12 schools. We are an outcomes-focused remote team of diverse, mission-driven employees who value collaboration and accountability.

Global

  • Build responsive, modern front-end interfaces in TypeScript, React, and Next.js.
  • Design, develop, and maintain back-end APIs and database logic using Supabase and PostgreSQL.
  • Take full ownership of features end-to-end, from concept and UI design to implementation and deployment.

Satellite builds dedicated engineering teams for successful American startups. They find and nurture the most driven technical talent for clients that build innovative products.