Senior Software Engineer contributing to Firefox installations, updates, and OS integrations at Mozilla. Collaborating with distributed teams to deliver high - quality software solutions.
About the role
- Senior Product Engineer at Moxie building payments and billing infrastructure for med sp...
Responsibilities
- Own and deliver medium-to-large FinOps projects end-to-end — from design through production — as a hands-on senior IC.
- Build deep expertise in FinOps systems and business context (Stripe, LayerFi, Cherry, and related billing/payments workflows), becoming a trusted technical resource for the team.
- Participate actively in Moxie's Engineering Architecture Process, contributing to and influencing technical decisions within your domain.
- Own at least one team- or domain-level non-project initiative — such as testing standards, documentation, or code review practices — that raises engineering quality beyond your own projects.
- Mentor IC1–IC2 engineers and act as a culture carrier for strong engineering practices, growing toward Staff (IC-4) scope over time.
Requirements
- Strong backend engineering experience, including schema/API design, data modeling, and async processing (Python/Django experience a plus).
- Deep PostgreSQL fluency — query optimization, schema design, migrations, and data-integrity patterns.
- Experience building and hardening third-party integrations, ideally in payments or financial systems, with strong attention to failure handling and idempotency.
- A track record of owning medium-to-large, sometimes ambiguous projects end-to-end as a senior IC, including tradeoff decisions and cross-functional coordination.
- Comfort influencing architecture and technical direction beyond your own immediate project scope.
- Experience mentoring engineers and raising the technical bar for a team.
- Excitement for high-ownership, early-stage environments where decisions matter and aren't buried under bureaucracy.
Benefits
- Above all, we're in this to empower small business owners to own and grow their businesses. Med spa providers depend on financial systems that just work — this role gives you direct ownership over that reliability.
- We have much left to build. Given the market feedback we're seeing and our team's experience, we believe we're writing the early chapters of a real success story — and this role gets to help write the financial-systems chapter of it.
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