Marçal Castellví
Principal Engineer at M47 - AI Company
Barcelona, Catalonia, Spain
Summary
👤
Senior🎓
Top SchoolMarçal Castellví is a Principal Engineer based in Barcelona with over 8 years of experience designing backend and cloud platforms that prioritize reliability, scalability and cost efficiency. He has led architecture and delivery across AWS-native systems, driving modular-monolith-to-microservices evolution, serverless cost optimizations and event-driven pipelines for high-volume media and social data. A pragmatic advocate of TDD, DDD and CI/CD, he combines hands-on implementation (C#, .NET, AWS) with coaching, hiring and defining technical career paths to raise team impact. His work includes a measurable >40% cloud cost reduction and building ephemeral testing environments that cut bugs and deployment friction. Comfortable translating product needs into technical strategy, he frequently bridges CTO-level planning with day-to-day engineering tradeoffs. Colleagues rely on him for pragmatic architecture choices that balance near-term delivery with long-term maintainability.
8 years of coding experience
18 years of employment as a software developer
Enginyeria Tècnica en Informàtica de Sistemes, Enginyeria Tècnica en Informàtica de Sistemes at Universitat Rovira i VirgiliFP II - Técnico en Informática de Gestión, FP II - Técnico en Informática de Gestión at Núria PerpinyàUOC (Universitat Oberta de Catalunya)
English, Spanish, Catalan
Stackoverflow
1reputation
0reached
1answer
0questions
Github Skills (68)
netcore10
serverless10
lambda-functions10
aws-apigateway10
lambda10
aws-lambda10
csharp10
aws10
dotnet9
mockwebserver9
testing9
wiremock9
docker9
mock-server9
matching9
Programming languages (4)
Github contributions (5)
macalbert/envilder
Sep 2024 - Feb 2025
A CLI tool to generate .env files from AWS SSM parameters
Contributions:3 releases, 4 reviews, 18 PRs in 5 months
aws-ssm-parameter-storeci-cdenvironment-variables
macalbert/write-parquet-java-demo
Jun 2020 - May 2021
Contributions:12 commits, 1 PR, 8 pushes in 11 months
avrojavawriterparquet
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