Senior Software Engineer

Nelo•New York, NY

1d•Hybrid

About The Position

You like building things that don’t fall apart when scale hits. We’re a fintech building systems that move fast but stay reliable and we need a Senior Software Engineer who can keep both in balance. You’ll work on distributed systems that power credit and marketplace products across LATAM. The problems are complex, the stakes are high, and the impact is real. Why it’s worth your time You’ll have real technical ownership, not just tickets in a sprint. You’ll shape architecture decisions and how the team builds. You’ll solve scaling problems that most engineers only read about. About Nelo Nelo is a leading consumer fintech and e-commerce platform in Mexico, with >$500MM in annualized GMV and >$70MM in annualized revenue. Our mission is to increase the buying power of consumers in Latin America, and we are doing so by building a modern alternative to credit cards. Nelo has raised over $40M of venture capital from investors including Homebrew, Two Sigma Ventures and Susa Ventures. Nelo has additionally raised a $100M asset credit facility from Victory Park Capital. Our lean team includes experienced leaders from top technology companies including Uber, Amazon, Rappi, and DiDi. We pride ourselves on our velocity, intellectual rigor, and efficiency. Nelo has offices in Mexico City and New York City.

Requirements

5+ years of backend engineering. You’ve built and broken real systems.
Deep experience with distributed architectures and complex codebases.
Comfortable with Kotlin and Spring (or close cousins) Solid AWS and Terraform knowledge.
You think in systems, not just in lines of code.
You communicate clearly and work without hand-holding.
You care about performance, data integrity, and elegant solutions.

Responsibilities

Design and ship backend systems that handle scale without drama.
Lead by example — code well, review hard, and mentor better.
Help shape how we evolve from a Kotlin monolith to smarter microservices.
Work with product, frontend, and data teams to turn ideas into things that work.
Keep quality high through CI/CD, testing, and pragmatic engineering.