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I’m a versatile software developer with startup experience, blending front-end craftsmanship with robust back-end systems and AI-enabled tooling to deliver scalable solutions. I thrive in fast-paced environments where collaboration across product, marketing, and engineering is essential, and I enjoy turning complex problems into clean, maintainable code. I’ve built and shipped full-stack applications in cross-functional teams, leveraging AWS, Docker, Node.js, React, and MongoDB. I’m motivated by innovation and growth, and I’m always eager to learn new technologies and best practices to improve product outcomes and team velocity.…I’m a versatile software developer with startup experience, blending front-end craftsmanship with robust back-end systems and AI-enabled tooling to deliver scalable solutions. I thrive in fast-paced environments where collaboration across product, marketing, and engineering is essential, and I enjoy turning complex problems into clean, maintainable code. I’ve built and shipped full-stack applications in cross-functional teams, leveraging AWS, Docker, Node.js, React, and MongoDB. I’m motivated by innovation and growth, and I’m always eager to learn new technologies and best practices to improve product outcomes and team velocity.

Juan Tate

Full Stack Developer, Developer, Web Developer, +4

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I’m a versatile software developer with startup experience, blending front-end craftsmanship with robust back-end systems and AI-enabled tooling to deliver scalable solutions. I thrive in fast-paced environments where collaboration across product, marketing, and engineering is essential, and I enjoy turning complex problems into clean, maintainable code. I’ve built and shipped full-stack applications in cross-functional teams, leveraging AWS, Docker, Node.js, React, and MongoDB. I’m motivated by innovation and growth, and I’m always eager to learn new technologies and best practices to improve product outcomes and team velocity.…I’m a versatile software developer with startup experience, blending front-end craftsmanship with robust back-end systems and AI-enabled tooling to deliver scalable solutions. I thrive in fast-paced environments where collaboration across product, marketing, and engineering is essential, and I enjoy turning complex problems into clean, maintainable code. I’ve built and shipped full-stack applications in cross-functional teams, leveraging AWS, Docker, Node.js, React, and MongoDB. I’m motivated by innovation and growth, and I’m always eager to learn new technologies and best practices to improve product outcomes and team velocity.

Available to hire

I’m a versatile software developer with startup experience, blending front-end craftsmanship with robust back-end systems and AI-enabled tooling to deliver scalable solutions. I thrive in fast-paced environments where collaboration across product, marketing, and engineering is essential, and I enjoy turning complex problems into clean, maintainable code.

I’ve built and shipped full-stack applications in cross-functional teams, leveraging AWS, Docker, Node.js, React, and MongoDB. I’m motivated by innovation and growth, and I’m always eager to learn new technologies and best practices to improve product outcomes and team velocity.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Portuguese

Fluent

Work Experience

Coding AI Trainer (Contract, Data Annotation)

March 1, 2024 - Present

Contributed to the enhancement of LLMs by generating, evaluating, and refining code across diverse programming languages. Enhanced AI-assisted coding practices by leveraging experience in AI training, enabling efficient utilisation of AI tools and a deeper understanding of their capabilities.

Full Stack Developer at Cosmos Capital Management

January 31, 2024 - August 8, 2025

Spearheaded the end-to-end development of a scalable NFT marketplace using Node.js, Express, and MongoDB, handling all aspects from architecture to deployment. Engineered the marketplace to handle over 55,000 transactions in its first month, implementing secure user authentication and payment systems. Developed and customised multiple e-commerce stores on platforms like Shopify. Translated complex UI/UX designs into responsive, mobile-friendly frontends using React, HTML5, and CSS. Architected a serverless driver matching algorithm using AWS Lambda and Python, showcasing strong backend and cloud infrastructure skills. Designed and optimised NoSQL database schemas for complex data relationships and high-performance queries. Operated with complete autonomy as the primary developer in a startup environment, consistently delivering projects under tight, business-critical deadlines. Translated diverse business requirements into robust and effective software solutions.

Front End Developer at Cosmos Sales and Marketing

July 1, 2022 - August 8, 2025

Began career as a Front-End Developer, implementing custom themes and collaborating with marketing to optimise e-commerce websites for user engagement and conversion.

Front End Developer (Promoted to Full Stack) at Cosmos Capital Management

December 1, 2021 - July 1, 2022

Architected a serverless matchmaking algorithm using AWS Lambda and Python, enabling user connections based on availability; designed and implemented MongoDB data models; built a responsive web marketplace with Node.js, Express, and React; integrated third-party APIs; translated business requirements into scalable software, and maintained robust, well-documented code.

Full Stack Developer at Cosmos Capital Management

July 1, 2022 - June 1, 2024

Led end-to-end development of the platform: optimized app performance with native geospatial queries for location-based matching, designed scalable MongoDB data models, built a full-stack solution with Node.js, Express, and React, and integrated CRM workflows using GraphQL; drove cross-functional collaboration across marketing, sales, and product teams.

Data Annotation (Contract) / Coding AI Trainer at Cosmos Capital Management (Contract)

June 1, 2024 - Present

Daily AI data labeling workflow, trainer responsibilities, creating prompts, and reviewing AI model outputs; enhanced AI-assisted coding practices by leveraging training data and experience with AI tools.