/roles — ROLE_270
Senior Backend Engineer
Well-funded fintech startup building a modern platform that automates payments between businesses
The role
- COMP
- $170K - $230K
- EQUITY
- Competitive Equity
- LOCATION
- San Francisco
- WORKPLACE
- On-site
- EXPERIENCE
- 5 - 12 years
- VISA
- None, Visa transfers
- STACK
- TypeScript, NodeJS, PostgreSQL, AWS, Snowflake, REST API, Python
- INDUSTRY
- Fintech, B2B, AI, Financial Services
The company
Fintech startup bringing business-to-business payments online, with a platform that automates how companies pay and get paid, built on well-structured financial data.
- STAGE
- scale-up
- FUNDING
- $250M+ raised
- TEAM
- ~30 people
- FOUNDED
- 2021
- BACKING
- backed by Y Combinator
JD — the work
About the role
You would own and build core backend infrastructure for a B2B payments platform, covering data infrastructure, payment systems, and internal tools that directly shape business results. The role suits a high-agency engineer who likes taking untidy, practical problems and making them into dependable production systems, and who wants to own work fully at a fast-moving startup. The team is about 30 people and works on-site in San Francisco.
What you'll do
- Build and own TypeScript and Node.js production services for payments and the core data layer
- Define service interfaces, schemas, and contracts for other teams to depend on, with correctness first
- Build internal tooling so colleagues can inspect data and see why decisions were made
- Take ambiguous projects from problem definition to proposal, production slices, and iteration
- Raise the speed, accuracy, and dependability of systems behind payment approvals and the customer experience
What they're looking for
- 5+ years of backend engineering experience
- Prior backend work on payments systems or financial products
- Strong TypeScript and Node.js; PostgreSQL, AWS, Snowflake, and Python are also in the stack
- High agency and comfort owning ambiguous work end to end