Portrait of Joan Serna

About

Joan Serna

Sr. Software Engineer, Tech Lead and AWS Solutions Architect with experience in web technologies Javascript, HTML, CSS, Angular, React. Building hybrid mobile applications and web systems, for different sectors such as health, hospitality, e-commerce and financial services. I consider myself a technology and learning enthusiast. There have never been excuses when learning something new. I love trying new technologies.

Experience

  1. Technical Lead · CloudX

    Sep 2025 – Present Remote, Colombia

    • Led a microservices architecture based on NestJS and Amazon ECS, ensuring high availability and scalability from the ground up.
    • Spearheaded Next.js applications integrated with the microservices ecosystem, optimizing frontend performance.
    • Architected a migration to Keycloak, centralizing identity management and improving platform security.
    • Increased deployment frequency and change traceability with structured release notes.
    • Standardized technical documentation with the C4 model and detailed technical notes in User Stories.

  2. Senior Fullstack Engineer · Parser

    Mar 2025 – Aug 2025 Remote, Colombia

    • Cut deployment time of 13 microservices by 80% with caching and parallelism.
    • Raised the quality of deliverables by enabling linter validation.
    • Adjusted an infinite retry mechanism to prevent database overload.

  3. Frontend Engineer · KLYM

    Aug 2022 – Feb 2025 Remote, Colombia

    • Created a payment simulator that reduced operations by 5%.
    • Improved module performance, increasing table load by 20%.
    • Integrated services such as credit risk, reducing operations by 3%.

  4. Software Engineer · Vaki

    Jul 2021 – Jul 2022 Remote

    • Built a checkout retry system that increased conversion.
    • Reworked the Vaki creation experience, increasing creation conversion.

  5. Software Developer · PappCorn

    Sep 2020 – Jul 2021 Remote

    • Built an Nx library that reused 70% of components across desktop and mobile.
    • Created a gamification medal system and a store redemption code system that increased reservations.
    • Developed an automated calling system that increased on-time arrivals.

  6. Software Developer · Clínica Salud Integral Vital Vida

    Oct 2017 – Mar 2021 Cartago, Colombia

    • Helped build clinical software from scratch with 6 modules, plus a companion app to follow up traveling health professionals.
    • Implemented a real-time scheduling module that prevents double-booked appointments.

Certifications

Talks & mentoring

  1. Modular Monoliths with Angular & Nx

    Sep 2025 NgConf Peru 2025

  2. Modular Monolith with Angular and Nx

    Nov 2024 DevFest Medellín 2024 · Google Developer Group Medellín

  3. Modular Monolith with Angular and Nx

    Nov 2024 DevFest Cali 2024 · Google Developer Group Cali

  4. Angular Signals

    Nov 2023 DevFest Bogotá 2023 · Google Developer Group Bogotá

  5. Angular Mentor

    Jun 2021 – Jul 2022 BeeSoft Labs