Backend Developer
Backend developer focused on APIs, Go services, and backend systems that need to hold up in production. I enjoy turning architecture and system design into reliable delivery, testing, and observability work.
APIs, messaging, analytical storage, and reliability work with real delivery constraints.
Built and refactored Go microservices and a layered API for a multi-tenant analytics MVP, introduced RabbitMQ-based Shopify webhook flows, and helped drive Redpanda Connect ingestion plus ClickHouse work that cut a worst-case dashboard query from over 60 seconds to under 30 milliseconds.
Implemented centralized observability for application logs and system metrics with Prometheus, Kibana, Elasticsearch, and APM agents, giving teams shared visibility into monitored applications.
Owned the backend implementation of two Java Spring Boot microservices for a digital wallet system, delivering 15+ REST endpoints for accounts, transactions, PayPal payments, and exchange-rate workflows with end-to-end responsibility across API design, business logic, caching, testing, and documentation.
Developed a Go REST API for a retail POS system, creating 25+ endpoints for inventory, sales, and user management with PostgreSQL, Docker, and JWT while aligning weekly with product managers and a senior engineer on delivery goals.
Three compact case studies from backend delivery, performance, and product-facing systems work.
Yari Labs case study spanning Go services, webhook ingestion, analytical storage, and real-time dashboard delivery.
The analytics MVP needed ingestion and query paths fast enough for real dashboard usage, not exploratory latency.
Built and refactored Go services and a layered API, added webhook-driven flows, and worked on Redpanda Connect plus ClickHouse query paths.
Turned a worst-case dashboard query into production-ready latency while validating ingestion bursts for live analytics workloads.
eDreams ODIGEO case study covering Java microservices for accounts, transactions, payments, and exchange-rate flows.
The wallet backend needed clear service boundaries and production-ready APIs across payment and transaction workflows.
Implemented two Spring Boot microservices, designed 15+ REST endpoints, and handled caching, testing, security, and delivery documentation.
Delivered the backend foundation for account, transaction, PayPal, and exchange-rate operations with end-to-end ownership.
Tlantic case study focused on Go API delivery for a retail POS product used around inventory, sales, and user management.
The platform needed practical backend coverage for core retail workflows without losing delivery rhythm or coordination.
Built the REST API with PostgreSQL, Docker, and JWT while working closely with product managers and a senior engineer on scope and delivery.
Shipped a production-oriented backend surface for core POS operations while keeping the work tightly aligned with product needs.
Tools and concepts that keep showing up in backend delivery.
Certificates from internships, technical courses, and learning programs that back up the skills shown across the portfolio.
Academic grounding that supports production-focused engineering work.
Sep 2023 – Oct 2026
Polytechnic Institute of Viana do Castelo
Oct 2020 – Jul 2023
I keep academic work separate from the main hiring narrative, but it still reflects how I approach rigor, measurement, and technical depth.
Based in Portugal and open to remote roles or relocation for teams building serious backend systems, APIs, and data platforms.
Use the form to send your subject, email, and a short description. I reply directly from brandao.business@hotmail.com.