root@server ~ $ whoami
Wilian Martinez Senior Backend Engineer
I’m Wilian, a Senior Backend Engineer based in Costa Rica. With over six years of experience in the industry, my core focus is on designing, developing, and deploying scalable microservices and robust cloud-native architectures.
Currently, I specialize in the Node.js and TypeScript ecosystems, alongside building high-performance systems. Whether I’m optimizing database queries across hundreds of millions of records in Elasticsearch or migrating critical legacy services, I am driven by writing clean, efficient, and maintainable code.
Beyond my daily engineering work, I am passionate about mentoring the next generation of engineers, bridging the gap between complex theoretical concepts and practical, production-ready applications.
root@server ~ $ uptime --working-time
01:39:19 up 6 years, 167 days, 1:39
root@server ~ $ _
root@server ~ $ skills --resume
Skills Overview (Main skills )
====
=> Javascript/Typescript
=> NodeJS
=> Fastify
=> NestJS
=> Elasticsearch
=> MongoDB
=> Redis
=> REST
=> gRPC
=> Microservices
=> Serverless
=> CI/CD
=> Docker
root@server ~ $ _
From: 07-01-2021 Current
A Company that offers Cybersecurity Anti-fraud Solutions, provides a product to serve reliable data to their clients, as a backend developer I worked serving services to different products client-faced and internal products, contributed to enhancements and bug fixing into the current microservices and internal tools, working with CI/CD, Git flow, and feature flags.
From: 02-01-2020 To:06-31-2021
A fintech that provides billing services to small businesses in Costa Rica, Colombia, Guatemala, and Peru, serving services to over 30K users, I contribute writing features, overseeing the operation in the Colombian branch, talking with stakeholders seeing features, bug fixing, constantly improving the product to offer user-facing features that give to the clients the ability to handle their billing process working with the government standards.