Senior Backend Engineer | Go · Node.js · Distributed Systems
Back-end Engineer
Available for hire
Years of
experience
10+ years
Experience
level
Senior
Available
for
Full-time, Contract
Available from
06 Nov 2026
Senior Backend Engineer with 10+ years of experience, including 5 years building production systems in Go and 7+ years with JavaScript/TypeScript (Node.js and React), focused on the reliability, performance and data consistency of distributed systems.
- Neon (Brazilian digital bank, 26M+ customers): cut the invoice-closing p99 from 30s to 3s using capacity sizing based on Little's Law, implemented the transactional outbox pattern with Kafka, cut monthly database cost by 89% and raised SLO attainment from 88% to 98%.
- WillDom / Lucid Motors: integrated EV charging with Tesla, Bosch and Electrify America using Go, gRPC, Kafka and NATS.
- Former CTO for 4 years, leading engineering teams; cut infrastructure cost by ~90% twice.
Working remotely with US and Irish teams since 2023. Looking for a remote Senior/Lead Backend role (Go or Node.js), or relocation with visa sponsorship.
Skills
Languages
Employment History
Senior Backend Engineer at
Neon
2026
-
2026
Credit card billing platform serving 26M+ customers (Go, Kotlin, C#, gRPC, Kafka, RabbitMQ, PostgreSQL, Kubernetes, ArgoCD, Datadog).
- Cut the invoice-closing p99 from 30s to 3s by optimizing database access and sizing Kafka consumer concurrency with Little's Law.
- Designed the data-consistency architecture with the transactional outbox pattern and idempotent consumers.
- Fixed random I/O and page-split issues, cutting monthly database cost by 89% and raising SLO attainment from 88% to 98%.
- Cut peak database load from 32k to 16k IOPS with batch writes; reduced installment journey p95 from 3s to 1s.
- On-call engineer; built a Claude Code skill (MCP) that cut incident resolution time from 3h to 1h.
Backend Engineer (Contract) - client: Lucid Motors at
WillDom
2025
-
2025
EV charging backend (Go, gRPC, Kafka, NATS, PostgreSQL, MongoDB, Kubernetes, AWS).
- Integrated Charging Point Operators (Tesla, Bosch, Electrify America, Electrify Canada) using the Strategy pattern.
- Reduced service latency to under 1s by parallelizing downstream calls with goroutines.
- Decommissioned 4 microservices, cutting cloud cost by $3k/month; refactored legacy code with DDD.
Full Stack Engineer (Contract) at
Cyrex Enterprise
2024
-
2024
- Built an e-commerce platform from scratch with Go, PostgreSQL, AWS and Terraform, integrating BigCommerce and Strapi.
- Developed features for an AI-powered retail analytics platform with React, Redux, Node.js, PostgreSQL and Elasticsearch.
- Built Next.js/React apps with CI/CD and Cypress E2E tests.
Full Stack Engineer (Contract) at
Praxis
2023
-
2024
- Led Go microservices with gRPC/Protobuf for a high-throughput platform, migrating a legacy system from PHP to Go.
- Software architect for Hilton Hotels' indoor navigation (React, TypeScript, MapLibre).
- Designed CI/CD pipelines.
CTO at
Ventura Academy
2021
-
2022
Cybersecurity awareness and training platform (Go, PostgreSQL, RabbitMQ, React, AWS).
- Reduced production incidents from 3 per week to zero.
- Delivered v2 in 3 months, cutting infrastructure cost by 90% while handling 2x peak traffic.
- Led a team of 4 engineers and oversaw sales and customer success.
Founder & CTO at
Rabi IT
2018
-
2021
Software consultancy for loyalty, payments, energy and retail clients (Smiles, Safira Energia, gal salon); led up to 4 engineers across 5 clients.
- Designed APIs and microservices in Node.js and Go with Clean Architecture and SOLID.
- Event-driven architectures with Kafka, RabbitMQ and AWS SQS; multi-acquirer checkout with split payments.
- PostgreSQL/MySQL performance tuning, Redis caching, CI/CD with GitHub Actions and automated tests.
Education
No education history.