![William Daza](https://jobicy.com/react/themes/app/images/avatar.jpg) William Daza # Tech Lead / Senior Backend-leaning Full-Stack Engineer Open to offers · Member since 23 Jul 2026 [Message](https://jobicy.com/dashboard-page.md) ShareLocationMedellín, ColombiaDesired salaryUnspecifiedWork preferenceRemote Only / Full TimeExperience levelLead * [Overview](#overview) * [Portfolio 0](#portfolio) * [Services 0](#services) ## About Professional summaryI am a senior backend-leaning full-stack engineer with 7 years of professional experience, focused on building reliable, scalable web platforms with TypeScript, Node.js, and NestJS. I currently work as a Tech Lead at Interplay Tech, where I define backend architecture, technical standards, and delivery practices for a high-traffic platform. I enjoy working in environments where systems are growing quickly and engineering processes need to evolve alongside the product. My background includes strong hands-on experience with AWS services such as EC2, S3, and Lambda, as well as Docker and GitHub Actions for CI/CD. I have worked extensively with MongoDB, PostgreSQL, and Redis, and I pay close attention to data modeling, performance, and maintainability. I have contributed across the stack, including React and Next.js, especially in projects where frontend performance and server-side rendering matter. I also have experience refactoring legacy codebases, improving code quality, and mentoring junior developers. I value engineering discipline and collaboration. I have worked with TDD, mandatory code reviews, clean code practices, and cross-functional distributed teams, and I am comfortable helping define standards as a team scales. I am fully remote from Colombia and open to opportunities where I can contribute as a senior engineer or technical leader, especially in product-focused teams that value strong architecture, delivery quality, and continuous improvement. ## Skills 23 capabilities[Architecture](https://jobicy.com/talent/architecture.md)[AWS](https://jobicy.com/talent/aws.md)[Code Review](https://jobicy.com/talent/code-review.md)[Data Modeling](https://jobicy.com/talent/data-modeling.md)[Docker](https://jobicy.com/talent/docker.md)[EC2](https://jobicy.com/talent/ec2.md)[GitHub Actions](https://jobicy.com/talent/github-actions.md)[Jest](https://jobicy.com/talent/jest.md)[Lambda](https://jobicy.com/talent/lambda.md)[Microservice Architecture](https://jobicy.com/talent/microservice-architecture.md)[MongoDB](https://jobicy.com/talent/mongodb.md)[NestJS](https://jobicy.com/talent/nestjs.md)[Next.js](https://jobicy.com/talent/next-js.md)[Performance Optimization](https://jobicy.com/talent/performance-optimization.md)[PostgreSQL](https://jobicy.com/talent/postgresql.md)[React](https://jobicy.com/talent/react.md)[Redis](https://jobicy.com/talent/redis.md)[Refactoring](https://jobicy.com/talent/refactoring.md)[S3](https://jobicy.com/talent/s3.md)[Scrum](https://jobicy.com/talent/scrum.md)[TDD](https://jobicy.com/talent/tdd.md)[Technical Leadership](https://jobicy.com/talent/technical-leadership.md)[TypeScript](https://jobicy.com/talent/typescript.md) ## Tech stack & tools Working toolkit ### Application Hosting [![Image](https://cdn.jsdelivr.net/gh/devicons/devicon@master/icons/redis/redis-original.svg) Redis](https://jobicy.com/talent?tool=redis.md) ### Data Stores [![Image](https://cdn.jsdelivr.net/gh/devicons/devicon@master/icons/mongodb/mongodb-original.svg) MongoDB](https://jobicy.com/talent?tool=mongodb.md)[![Image](https://cdn.jsdelivr.net/gh/devicons/devicon@master/icons/postgresql/postgresql-original.svg) PostgreSQL](https://jobicy.com/talent?tool=postgresql.md) ### Development [![Image](https://cdn.jsdelivr.net/gh/devicons/devicon@master/icons/docker/docker-original.svg) Docker](https://jobicy.com/talent?tool=docker.md)[![Image](https://cdn.jsdelivr.net/gh/devicons/devicon@master/icons/jest/jest-original.svg) Jest](https://jobicy.com/talent?tool=jest.md) ### Languages & Frameworks [![Image](https://cdn.jsdelivr.net/gh/devicons/devicon@master/icons/nestjs/nestjs-original.svg) NestJS](https://jobicy.com/talent?tool=nestjs.md)[![Image](https://cdn.jsdelivr.net/gh/devicons/devicon@master/icons/react/react-original.svg) React](https://jobicy.com/talent?tool=react.md)[![Image](https://cdn.jsdelivr.net/gh/devicons/devicon@master/icons/vitest/vitest-original.svg) Vitest](https://jobicy.com/talent?tool=vitest.md) ## Experience Career history ### Tech Lead · Interplay Tech Jan 2026 – PresentLead a team of 5+ engineers delivering high-traffic platforms. Define backend architecture and technical standards using NestJS, Node.js, and MongoDB. Coordinate technical direction with stakeholders and establish engineering standards such as TDD, mandatory code reviews, and clean code. Designed and implemented CI/CD pipelines on AWS and Docker. ### Senior Full-Stack Developer · Interplay Tech Jan 2025 – Dec 2026Developed and maintained high-performance applications using React, Next.js, and Node.js. Designed REST APIs and external integrations, refactored legacy codebases, and mentored junior developers. ### React/Next.js Developer · Interplay Tech Jan 2024 – Dec 2025Built full-stack features for high-availability platforms with a focus on server-side rendering and frontend performance. ### Backend Developer · DrEnvio Jan 2023 – Dec 2024Built logistics platform backend features and third-party API integrations in Node.js and NestJS. Implemented containerized deployments using Docker. ### Web Developer · Matchpoint Web Jan 2022 – Dec 2023Developed web applications with React and Node.js, and improved CI/CD processes and application performance. ### Full-Stack Developer · Go Digital Colombia Jan 2022 – Dec 2022Delivered healthcare platform modules focused on backend robustness, API error handling, and reliability. ### IT Recruiter · Torre.co Jan 2021 – Dec 2022Conducted technical screening and hiring for engineering roles across LATAM. ### Software Support / Junior Developer · Imetco Jan 2019 – Dec 2021Developed ERP modules in .NET and JavaScript, and built and deployed the company website end-to-end. ## Education Learning history ### Universidad Pontificia Bolivariana Jan 2017 – Dec 2024BSc, Systems and Computer Engineering Bachelor's degree in Systems and Computer Engineering. This professional hasn’t added portfolio projects yet. This professional hasn’t listed any services yet.