01
Nexo
Active
All of Portugal's public transport on one live map. Bus, metro, train, tram and ferry from 34 operators, with door-to-door journeys planned across every operator.
- Go
- TypeScript
- Svelte
- deck.gl
- Mapbox GL
Open to mid-level backend roles, relocating or fully remote
Luís
Peixoto
Backend Software Engineer at CEiiA
I make the impossible boring.
I build and own the backend systems that keep large platforms running, and I fix the problems others get stuck on. My favorite work is taking the systems nobody wants to touch and making them fast, secure, and boringly reliable.
- Based
- Vila Real, Portugal
- Permit
- EU citizen, no sponsorship needed
- Languages
- Portuguese native, English C1
Evidence
Four things I have actually done, with the numbers attached.
01
Zero data loss
Every senior engineer on the platform left. I held all 15 microservices on my own for about six months: 20+ production incidents resolved, millions of trips validated without interruption, and new work still shipping.
02
Every request faster
Authentication re-ran on every single request. I moved token storage into Redis and cut latency on every request from about 300ms to 14ms, roughly twenty times faster, across the whole platform.
03
100M+ records
I build and own 15+ Java and Spring Boot microservices behind platforms that process hundreds of millions of records and validate over a million trips a month, on Kafka, Redis, PostgreSQL, Docker and Kubernetes.
04
Hours, not days
I wire AI agents into daily engineering. A report a colleague spent 30 minutes on every day now writes itself, a full microservice test suite lands in hours instead of days, and new projects scaffold in minutes.
- 0+
- Years at CEiiA
- 0+
- Microservices owned
- 0M+
- Trips validated each month
- 0M+
- Records processed
What I do
Four things I am paid to be good at, and the evidence behind each.
01
High-Scale Backend & Distributed Systems
Java and Spring Boot microservices behind platforms that process hundreds of millions of records and validate millions of trips a month, using Kafka, Redis, PostgreSQL, Docker, and Kubernetes.
02
Monoliths → Fast, Secure Microservices
The thing I do best: turning tangled monoliths into clean, fast, scalable services, with security built in. One authentication redesign alone cut every request from ~300ms to ~14ms.
03
AI-Augmented Engineering
I wire AI agents deep into my workflow (Claude Code plus local models) to automate reports, generate full test suites in hours, and scaffold new projects in minutes.
04
Sustainability & Mobility Tech
Core engineer on AYR, CEiiA's award-winning platform (New European Bauhaus prize) that turns CO₂ avoided into digital green credits for citizens, cities, and partners.
Built on my own time
Side projects that are deployed, used, and maintained. Not demos.
Featured
02
Tools
Active
33 developer and design utilities in one keyboard-first workspace. JSON, SQL, CSS, JWT, regex, QR and more, running in the browser with no account and no tracking.
- Next.js
- React
- TypeScript
- Tailwind CSS
- Playwright
Also built
How I got here
Intern to platform owner in three years, plus the studying that ran alongside it.
2023 – Present
Backend Software Engineer
CEiiA, Centre of Engineering and Product Development, Matosinhos
I own high-scale Java and Spring Boot microservices across multiple teams, from data ingestion to AYR, CEiiA's award-winning sustainability platform. When the senior team left, I held the full platform alone for about 6 months: zero data loss, no interruption. Now I drive cross-team technical direction alongside the platform architect.
2022 – 2023
Academic Digital Innovation
Associação Académica da UTAD & Student Technology Chapter
Led digital transition projects, coordinated the technology department, and shipped event sites plus communication tools for the student community.
2022
Frontend Developer (Internship)
X-Plora
Built responsive front-end experiences and component libraries in Vue.js, where my frontend roots began.
Technical skills
- Core
- Java · Spring Boot · Spring Security · JPA/Hibernate · REST APIs · PostgreSQL · Redis · Apache Kafka · RabbitMQ
- Platform
- Docker · Kubernetes · GitLab CI · SonarQube · Grafana · Prometheus · JUnit · Mockito · Swagger/OpenAPI · Git
- Also
- TypeScript · React · Next.js · Claude Code and local LLM agents · Go · Rust · Tauri
Education
- 2024 – present
MSc Informatics Engineering & Web Technology
Universidade Aberta
- 2023 – 2024
Graduate Coursework in Software Engineering
Instituto Superior de Engenharia do Porto
- 2020 – 2023
BSc Communication and Multimedia
Universidade de Trás-os-Montes e Alto Douro
Certifications
CMMI · SOLID Architecture · Java Development Course
Core stack
- Java
- Spring Boot
- PostgreSQL
- Redis
- Apache Kafka
- Docker
- Kubernetes
- Grafana
06
Let's talk
Open to mid-level backend roles, relocation or full remote. Always happy to talk distributed systems, reliability, and the hard problems that don't have an obvious answer. Drop me a line.
peixotomdb@gmail.com