
Guillem
From Spain (UTC+2)
7 years of commercial experience
Lemon.io stats
1
projects done2880
hours worked1
offers now 🔥Guillem – Golang, React, Next.js
Guillem is a passionate and open-minded software developer with a strong desire to contribute to resilient solutions and new projects. He brings solid expertise in Go, SQL, and NoSQL databases, along with practical experience in AWS. In addition, Guillem possesses a deep understanding of programming concepts and demonstrates proficiency in JavaScript, TypeScript, React.js, Next.js, and Node.js. Guillem's strengths include his theoretical understanding, good presentation skills, and a keen interest in new approaches to web development. Overall, Guillem is a technically adept and versatile developer with a strong foundation in software development.
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Let’s get started today!Experience Highlights
Senior Full-stack Contractor
An online platform designed to assist students in preparing for university entry exams. It offers a suite of study resources, tutorials, and practice materials to help learners enhance their understanding and ace their tests. The platform provides a tailored learning experience with accessible and structured content that's geared toward achieving academic goals.
- Managed a rewrite of the frontend into a decoupled SPA architecture;
- Removed tedious manual jobs using OpenAI chat models;
- Mitigated account sharing using session tracking and device management;
- Integrated with Vimeo video.
Senior Back-end Developer
This is a data streaming tool for software and data engineers, powered by Meroxa. Its purpose is to help you move data from A to B. You can use the tool to send data from Kafka to Postgres, between files and APIs, between supported connectors, and any data store you can build a plugin for.
Guillem maintained many connectors and processors for the project.
- Built conduit-connector-mysql; it included database locking, opencdc position restoring, and many more features. For reference, this connector competes with mysql debezium;
- Developed and updated 10+ connectors;
- Learned how to use many different queue systems like pulsar, rabbitmq, kinesis;
- Learned how to work in an open-source environment.
Senior Full-stack Developer
B2B ecommerce analytics tool that helps companies such as MercadoLibre and Black & Decker manage and track tens of thousands of product prices. With Spiral Pricing, sellers can study price changes in real time, enabling them to have great market insights in a short amount of time.
- Helped grow the product from a few users to tens of sellers;
- Built a full-stack app with better perceived UX than the previous legacy monolith;
- Trippled the speed of multiple background jobs;
- Integrated with axiom.co to facilitate comprehensive application monitoring and performance analysis;
- Wrote unit and integration tests.
Senior Full-stack Developer
The ideal solution to track current analytics in the MercadoLibre marketplace. Sellers could easily track what was trending in each category and could measure their own sales performance.
- Built extremely performant analytics queries on millions of customer orders;
- Successfully delivered a full-stack web app in time and helped achieve 5k MRR;
- Built concurrent download algorithms to achieve high write throughput;
- Iterated through many UX designs;
- Integrated with Mercadolibre Oauth system.