Nicolás Sanchez

Software developer in Buenos Aires. I've been at LambdaClass since 2021, mostly working on backend systems in Elixir and Phoenix. Since 2022 I've also led teams; right now, a team of five on a restaurant management platform.

Besides backend I do a fair amount of frontend in React and TypeScript, plus infrastructure work: deploys, monitoring and that kind of thing. I use AI tools like Claude Code every day.

Experience

LambdaClass, 2021 to present.

  1. 2025 – now

    Restaurant management platform

    Tech lead, team of five

    SaaS for running restaurants, in production. I lead the team and work across the backend, the frontend and the deploy pipeline.

    • Built the public External API: versioned endpoints, API key management for clients and an approval flow for staff.
    • Worked on the deploy pipeline: preflight checks, serialized deploys and a rollback process that also reverts database migrations.
    • Wrote a Python load generator that simulates around 60 point-of-sale stations, which we used to reproduce a connection-pool problem from production and check the fix.
    • Set up Grafana dashboards versioned in the repo, and Slack alerts for failed merges and third-party outages.

    Elixir, Phoenix, PostgreSQL, React, TypeScript, Python, GitHub Actions, Ansible, Nix, Caddy, Grafana, Prometheus, Loki

  2. 2024 – 2025

    Game development team

    Two projects in parallel

    Kenzu: Shadow and Light

    A Metroidvania made in Unity, in early access on itch.io. I built the player controller, movement, jumping and combat, and spent a lot of time tuning how it feels to play. I also set coding patterns for the team.

    Multiplayer game backend

    Backend in Elixir for a real-time online game, built for 900+ concurrent players. WebSockets with Protocol Buffers for state sync, and an umbrella project split into game logic, physics and users. I also worked on CI/CD and Unity editor tooling for builds.

    Unity, C#, Elixir, WebSockets, Protocol Buffers

  3. 2021 – 2024

    Mevaterapia

    Developer, then tech lead from 2022

    Management system for an oncology center: treatments, appointments, patient records, billing and HR. It's still in use.

    • Led a team of between four and eight developers and was the main technical contact for the client.
    • Designed the database and business logic across the center's departments.
    • Integrations with ARCA (Argentina's tax authority) for electronic invoicing, and Google OAuth.
    • Monitoring with Grafana, Prometheus and Slack alerts; infrastructure on AWS.

    Elixir, Phoenix, PostgreSQL, AWS, Grafana, Prometheus

Stack

What I use most, not everything I've touched.

Backend
Elixir, Phoenix, LiveView, PostgreSQL
Frontend
React, TypeScript
Infrastructure
AWS, Hetzner, Terraform, Ansible, Nix, Caddy, systemd, GitHub Actions
Monitoring
Grafana, Prometheus, Loki, New Relic
Other
Python for tooling and load testing, Unity and C#

Education and languages

Education
Computer Engineering at Universidad de Buenos Aires, three years completed
Languages
Spanish (native), English (professional)

Contact

Email is the best way to reach me.

[email protected]