Javascript Component Framework Engineer

We’re making payments the most powerful tool in commerce—come build with us.

If you’ve spent your career endlessly wiring together UI tickets in heavily layered organizations … this role might feel very different. We’re looking for engineers who:

• Build systems and reusable frameworks, not just pages
• Think deeply about developer experience and maintainability
• Enjoy creating scalable UI architecture and component patterns
• Use AI as a force multiplier in their development workflow
• Think beyond frontend visuals and into workflows, and operational systems for internal and eternal users
• Care about performance, reliability, usability, and long-term scalability

You’ll be building real products alongside founders, including a technical co‑founder with deep industry experience and expertise, and a small, high‑performing engineering team. Expect to:

• Develop scalable UI frameworks that support complex operational workflows
• Create internal frontend tooling and developer experience improvements
• Build highly interactive interfaces for enterprise operations and payments workflows
  
  Partner closely with full stack engineers across Rails/Postgres systems
• Improve frontend testing and application infrastructure
• Build integration widgets and customer‑facing operational tooling
• Use and refine AI‑assisted development workflows and tools
• Contribute to architectural decisions as our platform and intelligence layers grow in size and scope

This is not a role where everything is already defined, but it’s also not greenfield. You’ll be building within established systems and patterns while helping evolve them over time. Our engineering team is intentionally small and high‑ownership. We currently support over 1,000 active clients across a Rails/Postgres stack with AI‑assisted development workflows integrated into daily work. We maintain a tests‑first culture, CI pipelines, and structured project context that keeps both humans and AI tools oriented.

This isn't a “move fast and break things” environment. It’s a “move fast because the guardrails are good” kind of environment. You’ll have real autonomy within well‑defined boundaries: clear architectural patterns, tested systems, collaborative decision‑making in real time, and documentation that allows you to ship independently without constant oversight.

We care less about years of experience and more about how you think and solve problems, and what you’ve built. You might be a great fit if you:

• Can design reusable, scalable frontend architecture rather than just individual screens
• Think beyond coding and into systems, workflows, maintainability, and developer experience
• Can show things you’ve built yourself: frameworks, design systems, side projects, automation tooling, Git Hub projects, or internal tooling work
• Care deeply about clean architecture, supportability, usability, performance, and scalability
• Are curious about how AI changes how software gets built

We use AI‑assisted development workflows daily as part of our core infrastructure. We’re looking for engineers who’ve already started building their own workflows and can demonstrate:

• A project where AI assistance measurably changed your development speed or approach
• How you support AI workflows with scripts, tooling, validation, or structured context
• Knowledge of how to feed context and data into AI tools to improve output quality
• A workflow you built to validate or test AI‑generated output
• Situations where AI failed confidently and how you built safeguards around it

We want engineers who understand where AI accelerates workflows and where human judgment still matters.

You’ll probably enjoy this role if you:

• Like solving new, sometimes ambiguous problems
• Have architected systems without being told exactly what to do
• Enjoy improving workflows, tooling, and developer experience
• Want real ownership of what you build
• Always wanted to push the envelope on new, tactile user experiences
• Care about long‑term quality, not just short‑term delivery

Our team works across modern backend and frontend technologies and is…