About US

We're looking for a Senior Software Engineer to build and scale our product across both backend and mobile. You'll take ownership of backend services while contributing to our React Native application, working on features from design to production.

Role Overview

We're looking for a Senior Software Engineer to build and scale our product across both backend and mobile. You'll take ownership of backend services while contributing to our React Native application, working on features from design to production.

Key Responsibilities

• Own backend services and APIs end to end — design, build, scale, and maintain them. This is real ownership, not integrating against APIs someone else owns.
• Lead on performance, scalability, and data modeling. Design schemas and queries that hold up under real production load, and fix the ones that don't.
• Contribute to the React Native app (~40% of the role). You're backend-first, but comfortable shipping mobile features alongside our mobile lead.
• Take features from idea to production with full ownership of quality — including what happens to them under load after launch.
• Help shape a clean, maintainable foundation as the product and user base grow.

What we're looking for:

• 4+ years of production experience, with deep backend ownership at a senior level.
• Strong command of Node.js / TypeScript and MySQL. Real depth in relational data modeling, indexing, and query performance — you can talk through why a query blocks a database and how you'd fix it.
• A track record of building systems that scale. You can point to specific services you designed and specific performance problems you solved.
• Solid React Native skills — enough to own mobile features, even if backend is your strength. Modern RN (current version); no legacy-only profiles.
• Fluent, confident English (C1+), confirmed on a live call.
• Full-time focus on this role. No concurrent employment, client contracts on the side, or active startups. We're looking for one person, fully in.
• Based in the Americas / LATAM time zones for overlap with our team, or willing to work those hours. 

Nice to have

• Experience with two-sided marketplaces or consumer social apps at scale.
• Comfort with AWS / DigitalOcean, CI/CD, and the React Native New Architecture.
• Apps or systems you can show us (App Store / Play Store links, or systems you can describe in detail).

Interested? Apply now by sending your resume at ana.citulean@xsoft-tech.com.