Source Job

$80,000–$165,000/yr
Europe 4w PTO

  • Refine and improve existing product functionality with focus on usability, consistency, responsiveness, performance, and visual quality.
  • Build and maintain scalable full-stack solutions and implement thoughtful frontend interactions across the product.
  • Collaborate with full-stack, data, ML, and DevOps engineers to evolve capabilities and own projects from concept to completion.

React JavaScript TypeScript Python AWS

20 jobs similar to Senior Full Stack Engineer - Core UX

Jobs ranked by similarity.

$130,000–$157,000/yr
US

  • Building intuitive, responsive, and maintainable user experiences using technologies such as JavaScript, TypeScript, React, Angular, and/or Vue.
  • Developing clean, well-tested, and maintainable code while following established engineering practices and standards.
  • Owning small-to-medium features from development through testing and deployment, identifying edge cases and raising risks or dependencies along the way.

Sphinx builds software to solve complex national security problems in Space. Founded by engineers and technologists, the company emphasizes collaboration, transparency, and individual responsibility.

UK Unlimited PTO

  • Own and deliver quarterly goals for your team, leading engineers through ambiguity and ensuring support throughout delivery.
  • Collaborate with product management, design, and analytics to articulate technical constraints and partner on decisions with risk and trade-offs.
  • Foster a culture of quality by setting code review and design standards, and develop talent through feedback and guidance.

Affirm provides a clear, predictable way to pay over time, with no hidden fees or surprises. We are a remote-first company serving over 20 million people, with a culturally rooted Silicon Valley team spread across Europe.

Netherlands 4w PTO

  • Design, build, ship, and own end-to-end features used by thousands of developers and millions of end users.
  • Bring a strong backend foundation while contributing confidently across frontend, backend, and data layers.
  • Work in a fully remote and autonomous environment, collaborating closely with Product and engineering teams.

Our partner is a fast-growing technology company backed by Y Combinator, building scalable systems for developers and end users. The company fosters a fully remote, autonomous culture with high engineering standards and continuous improvement.

Global 4w PTO

  • Design, build, ship, and own end-to-end product features used by thousands of developers and hundreds of millions of end-users.
  • Work across frontend, backend, and data boundaries, making thoughtful tradeoffs to deliver reliable, high-quality systems.
  • Take ownership from problem definition through production rollout and long-term maintenance, including scoping and prioritization.

RevenueCat gives app businesses the infrastructure and tools to build, run, and improve their monetization. We're a remote-first team of 150+ people across 25+ countries, guided by values we actually practice: Customer Obsession, Always Be Shipping, Own It, and Balance.

$175,000–$210,000/yr
US

  • Work across the stack to drive high-leverage projects from concept to completion and produce detailed technical specifications.
  • Up-level the team with expertise in API or system design, cloud infrastructure, healthcare data, or other areas while collaborating with a multidisciplinary team.
  • Build and refine user-facing features, establish consistent APIs, and write unit, integration, and end-to-end tests for new features.

Curai Health is a healthcare company that uses artificial intelligence and clinical expertise to make care more affordable, accessible, and effective. They are a mission-driven team of talented colleagues committed to collaborating closely and driving meaningful impact in healthcare.

$71,500–$89,500/yr
Spain

  • Lead a full stack engineering team, providing technical direction and mentoring engineers while remaining hands-on with the code.
  • Design and deliver production-grade applications across front-end, back-end, and cloud, using Go, React, and AWS.
  • Drive architecture, code quality, and CI/CD improvements, ensuring scalable and maintainable systems.

Mitek is a global leader in digital and biometric identity authentication, fraud prevention, and mobile deposit solutions. We are a publicly traded company with over 7,500 organizations worldwide and a culture focused on delivering, learning, and caring.

$116,800–$153,300/yr
Canada

  • Design, develop, and own polished, accessible, and performant user-facing features using React and TypeScript.
  • Establish high technical standards through code reviews, architectural decisions, and mentoring engineers.
  • Use AI and agentic development tools to accelerate delivery and improve productivity.

The company builds AI-powered products for fintech and fraud prevention. It is a remote-first, high-growth technology environment with a global team and a focus on engineering culture and autonomy.

Europe

  • Design and develop next-generation browser-based security features used by millions of people worldwide.
  • Provide technical leadership, architecture, and mentoring while collaborating with Product, UX, and QA teams.
  • Design integrations across complex systems and apply AI-enabled workflows to drive quality and performance.

The company creates browser-based security features that protect millions of consumers from online threats. It is a distributed, collaborative engineering organization with a strong culture of autonomy, trust, and engineering excellence.

US Unlimited PTO

  • Lead the technical vision and delivery of high-performance APIs and end-user experiences using Ruby on Rails and React.
  • Contribute to evolving software development and testing standards to elevate technical excellence across the team.
  • Collaborate with Product, Design, and Engineering teams to create high-impact features, balancing UX with clean code.

CirrusMD is redefining virtual care by delivering a Physician-first Care & Guidance solution that connects patients with licensed physicians via text or web within a minute. Serving 10 million users across all 50 states, the company offers a collaborative and diverse culture with unlimited PTO and remote-friendly growth opportunities.

US

  • Lead frontend architecture, including component design, state management, and performance for React and TypeScript interfaces.
  • Build and extend Python APIs and collaborate on data contracts, API design, and integration patterns.
  • Drive frontend standards, mentor engineers, and support internal tooling for operations and compliance.

Astra builds mission-critical infrastructure for moving money at scale, processing billions annually with 99.9%+ uptime. They are a remote-first, small, high-output team focused on collaboration and professional growth.

$120,000–$140,000/yr
US

  • Build and maintain backend services and web applications using Ruby on Rails.
  • Develop customer-facing frontend experiences with modern JavaScript frameworks, ideally React.
  • Design, implement, and support integrations with internal platforms, external APIs, and data services.

FBS is a top three vendor of MLS software, driving success through its software products. The company is 100% employee-owned, offering a professional-yet-casual environment where employees earn stock and enjoy strong benefits.

US Singapore

  • Build product-facing tools for browsing environments, inspecting trajectories, and understanding model behavior.
  • Develop vendor-facing workflows to create, submit, test, and iterate on RL environments and training data.
  • Create dashboards and observability tools surfacing environment quality, eval results, and pipeline health.

This company builds a reinforcement learning data engine for frontier AI labs, creating and iterating on training data. They have offices in San Francisco and Singapore, offering a culture that values independence and high agency.

$150,000–$220,000/yr
Americas

  • Design and deliver features across the full stack with direct impact on the product and finance-focused users.
  • Work closely with technical leadership to help establish engineering practices and contribute to system design.
  • Own complex technical problems end-to-end in a remote-first, collaborative environment.

The company builds AI-native financial planning and analysis software. It is an early-stage startup with a small team that values autonomy and thoughtful engineering.

Ireland

  • Own end-to-end feature development from React front-end to APIs and database layers.
  • Build scalable REST APIs with Python/FastAPI and optimize performance across the stack.
  • Collaborate with product, design, and engineering to shape an AI-native cybersecurity product.

Our partner builds a customer-facing B2B SaaS product at the intersection of generative AI and cybersecurity. They are an early-stage startup with an experienced team from Big Tech, offering high autonomy and minimal bureaucracy.

EMEA

  • Design and deliver a scalable, highly available, resilient, and secure cloud-base infrastructure.
  • Collaborate with cross-functional teams to define, design, and ship application features.
  • Ensure the performance, quality, and responsiveness of applications and infrastructure.

ClickHouse is a real-time analytics database company that provides a cloud platform for managing and querying data. The company is globally distributed with over 25 countries, remote-friendly, and values a culture of continuous improvement and collaboration.

US

  • Own and deliver quarterly goals for your team, leading engineers through ambiguity to solve open-ended problems.
  • Collaborate with product management, design, and analytics to articulate technical constraints and partner on key decisions.
  • Foster a culture of quality and ownership by setting code review and design standards and advocating through writing and tech talks.

Affirm is a financial technology company that offers clear, predictable pay-over-time solutions for consumers. It is a remote-first company with a culture of care and transparency, providing comprehensive benefits and supporting employee growth.

Global 7w PTO

  • Build and ship Page Builder features that directly impact how customers design and publish their sites.
  • Work across the stack using React & TypeScript (frontend) and Ruby on Rails (backend).
  • Partner closely with product/design to translate specs into high-quality, user-friendly experiences.

Circle builds an AI-powered platform for creators and businesses to engage their audience with discussions, live streams, events, and payments. We are a fully remote company of 270 team members from 30+ countries, with a culture of async collaboration and bi-annual global offsites.

US

  • Shape the end-to-end user experience of the Hypori Console by gathering feedback from stakeholders and defining efficient interaction patterns.
  • Lead front-end architecture for the Console, including component structure, state management, and build tooling, while staying fluent in backend services.
  • Deliver features end-to-end from UI through REST APIs in a microservices environment deployed on Kubernetes, with a focus on accessibility and security.

Hypori, Inc. is a high-growth cybersecurity SaaS company transforming secure mobility with a virtual workspace platform that lets users access enterprise apps and data from any mobile device without storing data on the endpoint and ensuring total personal privacy. Backed by $55M in funding from investors including UBS, AE Industrial Partners, Hale Capital Partners, and GreatPoint Ventures, it is expanding into new commercial and regulated markets.

$140,000–$180,000/yr
US

  • Develop full-stack web applications using modern TypeScript with a functional-first approach.
  • Build scalable backend APIs in Node and PostgreSQL and implement intuitive UIs from Figma mockups.
  • Collaborate through code reviews, mentorship, and agile practices to maintain high technical standards.

Care Access is dedicated to making the future of health better for all by bringing world-class research and health services directly to communities that face barriers to care. With hundreds of research locations, mobile clinics, and clinicians globally, they support local leaders and ensure equitable access to medical breakthroughs.

$165,000–$200,000/yr
US

  • Build production-grade React applications with TypeScript and maintain a shared component library.
  • Develop rich interfaces for structured engineering data, AI agent interactions, and portfolio-level dashboards.
  • Collaborate with backend engineers on API integration and contribute to frontend architecture decisions.

Re:Build Manufacturing operates an advanced manufacturing platform that partners with industrial companies to take products from concept to production. The company is guided by the Re:Build Way principles and focuses on revitalizing America's manufacturing base, creating meaningful jobs across the country.