About Me

Computer engineer and developer by vocation. I've spent over 30 years building software — from video games in C++ to microservices in Kotlin and Spring Boot, including Android apps with hundreds of thousands of users.

I'm currently a Principal Software Engineer at BestSecret, one of Europe's leading e-commerce platforms.

My obsession remains the same as day one: constantly learning and helping my teams improve.

I'm passionate about backend development, software architecture, the Kotlin ecosystem, agile practices, and anything that involves Docker.

Lately I've been exploring game development with Godot and the possibilities of AI-assisted development: Claude, GitHub Copilot, and agentic workflows.


Sergio Delgado

Career

Some highlights from over 30 years in the industry


BestSecret

Principal Software Engineer at one of Europe's leading e-commerce platforms.

Gradle Inc.

Senior Software Engineer at the company behind one of the world's most widely used build tools.

ThoughtWorks

Lead Consultant Developer at the world-renowned software engineering consultancy.

AWS Blog

Authored a guest post on the official AWS blog about optimization with CodeGuru.

Direct Line Spain

Championed the idea and built from scratch Spain's #1 insurance app: 180,000+ users and 4+ star rating.

Legend Studios

Video game developer in C++. Worked on the RTS "War Times": UI and TCP/IP networking.

Technologies

Languages & Frameworks

Kotlin Java Spring Boot Spring Cloud Micronaut Vert.x

Cloud & DevOps

AWS Azure Docker Kubernetes Terraform CI/CD

Data & Messaging

Kafka Elasticsearch PostgreSQL MySQL Redis DynamoDB Couchbase

Systems

Linux Atomic Distros Server Administration

Mobile

Android Jetpack Kotlin Multiplatform

Architecture & Methodologies

Agile Design Thinking BDD DDD Microservices Open Source

AI

Claude GitHub Copilot Agents n8n

Gamedev

Godot KorGE LibGDX

Featured Projects

Open source, games and GitHub contributions

Perro Sanxe en el Planeta Rojo

Satirical simulation game made with Godot. A meteorite is coming and it's going to break Spain!

Godot Game Simulation

obsidian-qmd-search

Obsidian plugin with QMD-powered semantic search.

Obsidian QMD Semantic Search

bluefin-dx-slimbook

Custom Bluefin DX image with Slimbook laptop support.

Dockerfile Linux Fedora

vial-qmk

QMK fork with Vial features for custom mechanical keyboard firmware.

C QMK Firmware

Contact

Want to talk? Find me on these platforms.