Open to opportunities

Felipe Nascimento

@felipenascimento

I’m a senior full-stack engineer who builds scalable fintech and high-traffic checkout systems with technical leadership.

Brazil

Message

What I'm looking for

I’m looking to lead and build senior full-stack fintech systems—payments, billing, and high-traffic checkout—where reliability, clean engineering practices, and fast iteration with AI-assisted development are valued.

I’m a senior full-stack engineer with 12 years of experience and 5+ years in payments infrastructure, fintech billing, and high-traffic checkout. I’ve led engineering at scale—2.6M students, 360k DAU, and 4M pages/day—staying hands-on with code across Elixir, Ruby on Rails, React, and PostgreSQL.

I’ve spent 6 years in technical leadership, driving reliability through incident response and root-cause performance fixes using Datadog/New Relic. I build resilient systems end-to-end (APIs, data pipelines, background jobs, and observability), and I keep teams shipping with a strong testing culture and AI-assisted workflows like Claude Code and Cursor.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Gierd

Jul 2025 - Present (11 months)

Built fault-tolerant API integrations for 5 major marketplaces (eBay, Amazon, Walmart, Target, Shein) using OAuth 2.0, rate limiting, and retry strategies. Architected Rails-to-AWS/S3-to-BigQuery pipelines with checkpointing and implemented subscription management via Stripe, delivering full-stack features with Rails 8 and Hotwire.

Hotwire (Turbo + Stimulus)Solid Queue Stripe BigQuery DBT Airbyte OAuth 2.0 AWS S3 TDD

Engineering Manager

Árvore

Feb 2023 - Jul 2025 (2 years 5 months)

Led engineering to scale an EdTech platform from a 5-engineer team to 10 engineers and delivered a POC in 1 month with full production features the next month, reaching 2.6M+ students, 360k+ DAU, and 4M pages read/day. Directed incident response for 2 months of post-launch instability, restored stability without data loss, and improved production performance by resolving N+1 queries, missing index

Elixir Phoenix GraphQL AWS Oban SQS Datadog New Relic Performance Tuning Incident Response

Engineering Manager

Quero Educação

Jul 2020 - Jan 2023 (2 years 6 months)

Led engineering across Quero Pago (billing infrastructure, multi-channel student communication, and payment reconciliation) and the Quero Bolsa Checkout squad, owning the recurring billing funnel using Adyen and Pagar.me. Built a real-time WhatsApp integration and low-latency messaging API (email, SMS, WhatsApp), and maintained end-to-end observability with Rollbar, Prometheus, and Grafana while i

Ruby on Rails Elixir React Vue.Js Adyen Pagar.Me Rollbar Prometheus Grafana Kafka

Fullstack Software Engineer

Quero Educação

Jul 2019 - Jul 2020 (1 year)

Co-built Adam, a multi-channel billing communication system in Elixir that handled ~450k messages/month across email (SendGrid), SMS (Sinch), and WhatsApp. Debugged and reconciled payment transactions via Pagar.me and used SQL to identify student delinquency states to trigger the correct communications.

Elixir Phoenix PostgreSQL Sendgrid Sinch Pagar.Me WhatsApp Integration SQL Docker

Software Engineer

Agrotools

Apr 2014 - Jun 2019 (5 years 2 months)

First engineering hire and grew from intern to fullstack developer, leading projects and providing indirect people leadership over 5 years while modernizing the tech stack. Built geospatial applications with C#, PostgreSQL/PostGIS on the backend and Vue.js/JavaScript on the frontend, introducing React and Vue.js to replace a primarily Microsoft-based web/mobile stack.