Miguel Fernández
Contractor. Cloud Back-end And Infrastructure at Hasura
Gijón, Asturias, Spain
Summary
🤩
Rockstar🎓
Top SchoolMiguel Fernández is a seasoned back-end and infrastructure contractor with 16 years of experience designing and operating reliable, scalable systems for cloud and product teams. He has shipped high-impact improvements at companies like GitHub, Fastly, and Hasura, and is experienced in Ruby and Go ecosystems as well as distributed systems, performance and reliability engineering. Miguel is a proven mentor and process improver who regularly formalizes development workflows and helps teams grow remotely across time zones. He contributes to notable open-source projects such as Prisma and elasticsearch-rails, where his work on ORM engines and MongoDB integrations improved robustness and observability. Based in Gijón, Spain, he combines deep systems thinking with practical engineering — from low-level logging and query fixes to architectural redesigns that reduce replication lag and increase availability. He’s available for part-time contracting and often blends interests in hardware/software interfaces and language/runtime implementation into pragmatic backend solutions.
16 years of coding experience
11 years of employment as a software developer
BSc Computer Engineering, BSc Computer Engineering at Universidad de Oviedo
Github Skills (28)
ruby-rails10
amazon-elasticsearch10
testing10
typescript10
rails10
prisma10
mongodb-database10
ruby10
elasticsearchquery10
orm10
aws-elasticsearch10
typescript-types10
query-engine10
elasticsearch10
error-handling10
Programming languages (13)
Github contributions (5)
prisma/prisma-engines
Oct 2022 - Jan 2023
🚂 Engine components of Prisma ORM
Role in this project:
Back-end Developer
Back-end DeveloperContributions:439 reviews, 93 commits, 252 PRs in 3 months
Contributions summary:Miguel primarily focused on the Prisma ORM engine components, particularly those related to MongoDB integration. Their contributions include fixing MongoDB-related logging issues, refactoring code, and adding tests related to MongoDB queries. The user also worked on improving the codebase by removing unnecessary casting and addressing issues in the query engine's logging logic and test suite. The commits showcase the user's involvement in debugging and improving the performance of Prisma's engine.
prisma-ormprismarustgraphqltypescript
prisma/prisma
Oct 2022 - Dec 2022
Next-generation ORM for Node.js & TypeScript | PostgreSQL, MySQL, MariaDB, SQL Server, SQLite, MongoDB and CockroachDB
Role in this project:Back-end Developer
Back-end DeveloperContributions:45 reviews, 75 commits, 58 PRs in 1 month
Contributions summary:Miguel primarily contributed to the backend of the Prisma ORM, focusing on client-side functionalities and error handling. Their work involved simplifying conditional logic in the binary engine, improving documentation for error adapters, and removing usages of client actions. Additionally, the user enabled fluent APIs for specific methods and addressed issues related to error wrapping and exception handling within the Prisma client. These changes enhanced the robustness and usability of the Prisma client library.
sqlserverunit-of-workormmongodbsql-server
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