Sr Full Stack Engineer / Technical Lead – on siteSimple Solutions • San Francisco - Bay Area, California, United States

Sr Full Stack Engineer / Technical Lead – on site

Simple Solutions • San Francisco - Bay Area, California, United States

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Job Title : Sr Full Stack Engineer / Technical Lead – on site

Location :

SF / Bay Area, California working at an upstart company in Fintech / Financial App for emerging markets.

The Role

A Technical Lead on our team is a hands-on leadership role for candidates with breadth across multiple layers of our stack and the judgment to drive technical outcomes. We are building :

An iOS app (Swift)
An Android app (Kotlin)
A Web app (React)
A standalone backend (Python + FastAPI, Postgres, AWS)

If you bring a mix of these skill sets and can guide others to deliver high-quality software, this role may be a strong fit. Please also review our Senior Android / iOS / Frontend / Backend roles for deeper, discipline-specific details.

As an early engineering leader, you will define our architecture, set engineering standards, and lead the delivery of a performant, reliable, and secure product from the ground up. The problem space includes financial services with real-money movement at international scale and non-trivial compliance, integrity, and latency constraints. You will collaborate across product, design, and operations, and help grow and mentor the team. You will work directly with the founders. This role may expand to broader engineering leadership across platforms as we scale.

Interview Stages

MUST HAVE SKILLS

Requirements

Experience at banking / credit card / crypto / remittances / lending startups

Experience dealing with the nitty-gritty of Anti-Fraud, AML, Ledgering, Payments Orchestration

7-10 years building and shipping consumer-facing mobile and / or web applications with meaningful full‑stack exposure (, React / TypeScript, Python, Go / Rust, Postgres, AWS, modern CI / CD).

Demonstrated experience managing technical teams, making architectural decisions, and mentoring engineers.

You might be an especially good fit if you have :

Experience building for the Latin American market

Experience in financial technology

Strong systems-thinking and design sense

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Sr Full Stack Engineer Technical Lead on site • San Francisco - Bay Area, California, United States

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