Staff Engineer – Billing, Invoicing & Disputes

Trustly, Inc.; San Francisco (CA); Hybrid; USD 190,000 - 270,000; Full time

Benefits offered by this job

Flexible PTO

Medical, dental, vision insurance

Home office setup allowance

Internet stipend

401k match

Parental leave

Job summary

Trustly, Inc. is seeking a senior staff engineer to own Billing, Invoicing, Collections, and Disputes end-to-end, including architecture, reliability, and production operations. The role emphasizes ownership of pricing, tiered/dynamic structures, and traceable ledger entries.

You will start by rapidly learning a mature codebase, using AI tools to map it and draft docs, then help hire and lead the team within the first year.

Qualifications

• 10+ years building and operating production software systems.
• Experience with payments, banking, or other financial systems where correctness, auditability, and uptime matter most.
• You have carried the pager for systems you built and improved.
• Able to take over an unfamiliar, business‑critical codebase.
• Daily use of AI coding tools with clear boundaries between automation and human review.
• Strong distributed systems design: data consistency, idempotency, concurrency.
• Clear design docs and incident write‑ups are reused by others.
• Production experience with Java or a comparable backend language.
• Experience owning billing, pricing, collections, or disputes systems where financial accuracy is audited.

Responsibilities

• Own architecture, service contracts, and production health of Billing, Invoicing, Collections, and Disputes.
• Operate services: on-call, SLAs, incident response, and root-cause fixes.
• Meet observability standards; improve the service each quarter.
• Use AI tools to map code and produce design docs, interface definitions, and runbooks.
• Help hire and shape the team that will own this domain.

Skills

Production software

Payments domain

Pager on‑call

AI coding tools

Distributed systems

Java backend

Tools

Claude Code

Cursor

Copilot

Job description

Trustly, Inc. is seeking a senior staff engineer to own Billing, Invoicing, Collections, and Disputes end-to-end, including architecture, reliability, and production operations. The role emphasizes ownership of pricing, tiered/dynamic structures, and traceable ledger entries.

You will start by rapidly learning a mature codebase, using AI tools to map it and draft docs, then help hire and lead the team within the first year.