Source Job

Europe

  • Make identity verification provider-agnostic, replacing tightly coupled solutions with a reusable service (mostly Ruby, some Go).
  • Improve KYC conversion by working across backend and web from started to submission.
  • Own web side of provider integrations: load SDKs, handle errors, and scale the React app.

Ruby Go React Backend Engineering

20 jobs similar to Senior Full-Stack Engineer

Jobs ranked by similarity.

Americas

  • Contribute to a core system that millions of end users rely on
  • Implement backend services and design architecture where reliability matters
  • Collaborate with teams to improve system interactions and maintain quality, including code reviews and incident troubleshooting

Alpaca is a global leader in agent-first brokerage infrastructure for stocks, ETFs, options, crypto, and more. With 400+ employees worldwide and $400M in funding, they are committed to open source and a remote-first culture.

Netherlands

  • Design, build, and operate reliable backend services for customer onboarding and identity verification.
  • Collaborate with Product, Engineering, and external providers to improve automation and regulatory standards.
  • Contribute to scalable APIs and orchestration capabilities for KYC/KYB, identity verification, and compliance workflows.

Our partner is building and evolving backend infrastructure for secure, compliant financial services. They operate in an international, fast-growing environment with a hybrid or remote working approach.

Americas

  • Develop and operate Alpaca's authentication, authorization, and identity provider services.
  • Write Go for backend services and React/TypeScript for auth-related UI, owning features end to end.
  • Collaborate with engineering teams on identity and access integration and maintain high code quality.

Alpaca is a US-headquartered global leader in agent-first brokerage infrastructure for stocks, ETFs, options, crypto, and more. The company has a diverse team of 400+ globally distributed members and is backed by $400 million in funding, fostering a culture of curiosity, empathy, and accountability.

Poland

  • Break down larger projects into individual tasks and deliver them in phases.
  • Collaborate with product, design, and analytics to balance risks and trade-offs.
  • Support operations by creating metrics and participating in on-call efforts.

Affirm provides clear and predictable payment solutions, letting people pay over time with no hidden fees or surprises. The company serves over 20 million users and fosters an agile, fast-paced culture that values curiosity, ownership, and collaboration.

Canada Unlimited PTO

  • Own features end to end, from shaping the problem to launching in production.
  • Set technical strategy and collaborate with product, design, and analytics.
  • Foster a culture of quality through code review standards and on-call health.

Affirm provides clear, predictable pay-over-time options with no hidden fees. We are a remote-first company focused on quality, security, and using AI to improve customer experiences.

$140,000–$220,000/yr
North America LATAM Europe

  • Ship product end to end, from backend services and APIs to dashboard and developer-facing UIs.
  • Build the tools developers and agents use to reach Nango: APIs, SDKs, CLI, MCP and the web app.
  • Work directly with customers to understand their integration and agent use cases, then turn what you learn into a product.

Nango is a developer infrastructure company providing API access for agents and apps, enabling AI applications to connect to the real world through integrations. It is YC-backed with multi-million ARR, a team of 14, and over 700 paying customers including Replit and Ramp.

$124,749–$196,225/yr
US

  • Build REST APIs that power core customer experiences
  • Ship features daily in a highly scalable, cross-geo distributed environment
  • Work end-to-end on features, from shaping vague problem statements to measuring impact, with backend-heavy React and Rails work

Atlassian provides team collaboration software including Jira, Confluence, and Trello used by organizations worldwide. As a large global company, Atlassian emphasizes an inclusive culture and flexible distributed work options.

Colombia

  • Develop and scale high-performance, cloud-native web applications across frontend, backend, and infrastructure.
  • Transform prototypes and automation tools into production-ready features while optimizing backend worker queues and cloud infrastructure.
  • Leverage AI-assisted development tools to improve code quality, conduct reviews, and build dashboards for automation pipelines.

Coforge is a global IT services and consulting company that builds cloud-native applications and automation solutions. The company promotes an inclusive, collaborative culture and supports remote work and continuous learning.

Poland

  • 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 make decisions that properly consider risks and trade-offs.
  • Foster a culture of quality and ownership by improving code review and design standards, and support on-call efforts.

Affirm provides clear, predictable ways for people to pay over time, with no hidden fees or surprises. It is a remote-first company with over 20 million users and a Silicon Valley-rooted culture focused on transparency and impact.

Global

  • Own and ship backend features from requirements to production using Ruby/Rails, Go, or other modern languages.
  • Collaborate with Product Management, Frontend, Infrastructure, and Security in an asynchronous, remote environment.
  • Write maintainable, secure, and observable code while leveraging AI to accelerate daily engineering work.

GitLab is an intelligent orchestration platform for DevSecOps, helping organizations ship better, more secure software faster. Trusted by more than 50 million users and 50% of the Fortune 100, it fosters a remote-first, high-performance culture built on values and AI-driven collaboration.

UK Unlimited PTO

  • Build and operate systems for bank and card payments across Affirm’s international markets.
  • Collaborate with product, analytics, and engineering teams to solve challenges across currencies and customer needs.
  • Foster a culture of quality and ownership through code review, design standards, and mentoring.

Affirm provides a clear, predictable way to pay over time with no hidden fees. It is a remote-first company with a global team, emphasizing transparency and flexibility.

Canada Unlimited PTO

  • Break down larger projects and deliver in phases with team support.
  • Collaborate with product management, design, and analytics throughout the product lifecycle.
  • Support operations by monitoring metrics and participating in on-call efforts.

Affirm is a financial technology company that provides transparent, flexible payment solutions over time, aiming to simplify the shopping and payment experience. The company is remote-first and offers its employees comprehensive benefits including full medical coverage, stipends, and equity opportunities.

$175,000–$185,000/yr
US

  • Architect, design, and implement backend services supporting APIs for mobile and web clients.
  • Automate manual processes and collaborate with cross-functional teams to capture requirements.
  • Resolve software integration issues and deliver technical improvements and bug fixes.

Swiftly is the AI platform purpose-built for retail, serving retailers, wholesalers, and brands with AI agents that unify data and automate workflows. They are a growing team of experienced industry professionals who value collaboration, ownership, and continuous learning.

Canada Unlimited PTO

  • Own and evolve cross-cutting platform systems—approval workflows, permissions, authentication, and notifications.
  • Lead complex, multi-stakeholder initiatives and set the code quality standard for the team.
  • Advocate for AI-forward workflows and develop teammates with visible multiplier impact.

Wrapbook is the AI platform for production finance, building a system that gives finance teams control over payroll, spend, and accounting for film, TV, and commercials. With a team of 350+ backed by top investors, we're using AI to transform finance workflows.

Poland

  • Build and iterate on A/B tests and experiments to increase first purchases on GitLab.com and self-managed GitLab.
  • Implement backend features in Ruby on Rails and frontend experiences in Vue.js for registration, trial, and upgrade flows.
  • Collaborate with Product Managers, UX Designers, and Data Analysts to ship small changes quickly and measure impact.

GitLab is the intelligent orchestration platform for DevSecOps, helping organizations increase developer productivity and ship better, more secure software faster. Trusted by over 50 million registered users and more than 50% of the Fortune 100, GitLab fosters a high-performance, remote-first culture driven by values and AI adoption.

$75,600–$102,600/yr
European Union

  • Own accounting integration projects from problem definition through launch and iteration.
  • Build reliable, scalable backend services for accounting and financial workflows.
  • Partner with Product, Design, Operations, Compliance, and external providers on complex initiatives.

A fintech engineering team building and scaling financial products and backend platform capabilities. The culture values reliability, collaboration, and working through ambiguity in a fast-paced, high-growth environment.

US Unlimited PTO

  • Break down larger projects into individual tasks and deliver them in phases.
  • Collaborate with product, design, and analytics to make risk-aware decisions.
  • Support operations by creating metrics and participating in on-call efforts.

Affirm exists to provide clear, predictable pay-over-time solutions with no hidden fees, connecting consumers with merchant partners through a personalized shopping experience. As a remote-first company, Affirm values transparency, flexibility, and inclusion, offering comprehensive benefits and opportunities for growth.

Canada

  • Design, build, and maintain scalable backend services for order routing, task allocation, fulfillment tracking, and shopper compensation.
  • Lead technical design for high-impact projects and improve fulfillment efficiency across marketplaces.
  • Ensure Tier-0 systems are reliable, incorporate AI-assisted tools, and mentor fellow engineers.

The company operates large-scale, real-time fulfillment operations across consumer and enterprise marketplaces. It is a remote-first organization with a collaborative, cross-functional engineering culture.

Europe

  • Develop secure, well-tested features using Ruby on Rails and GraphQL to improve GitLab's source code experience.
  • Design and maintain backend services and APIs while supporting production reliability through performance tuning and observability.
  • Collaborate with cross-functional teams and use AI agents to speed delivery while critically reviewing their output.

GitLab is the intelligent orchestration platform for DevSecOps, enabling organizations to improve developer productivity and security. Trusted by over 50 million users and most of the Fortune 100, it fosters a high-performance culture built on shared values, AI adoption, and continuous knowledge exchange.

LATAM Europe 3w PTO

  • Design, build, and maintain full-stack features across frontend applications and backend services.
  • Develop and maintain backend APIs for onboarding, authentication, transaction lifecycles, and operational workflows.
  • Build and enhance front-end experiences in customer-facing and internal web applications.

Veta Virtual is a talent company that hires for high-growth clients in the fintech and cryptocurrency industry. They foster a collaborative, high-trust culture and offer fully remote work opportunities.