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Sérgio OliveiraSO

Sérgio Oliveira

Full Stack Developer (Web, Mobile, Backend)

€250/day
Porto, PT
8-15 years

Average response time: 1 hour

About Sérgio

My Site: sergio.pt

Senior Full-Stack Engineer | React, Node.js, React Native15 years building scalable web and mobile applications for startups and enterprise clients.

What I Do:

Full-stack development with React, TypeScript, Node.js, and PostgreSQL
React Native mobile apps for iOS and Android
System architecture and technical leadership
AI-augmented development for 3-5x faster delivery
Experience Highlights:

Co-founded and built Bondlayer (SaaS platform) over 10 years
Deployed 100+ mobile apps for Vodafone, NOS, Galp, Superbock, Serralves
Scaled systems to 90,000 concurrent users

My Approach:
Specifications > Code. I ask thorough questions upfront, think through edge cases, and build systems that scale gracefully. Deep product engineering experience means I understand both technical implementation and business context.Tech Stack:
Frontend: React, Next.js, TypeScript, Tailwind CSS
Mobile: React Native, Expo
Backend: Node.js, Express, Next.js, Hono, bun
Database: PostgreSQL, Redis, MongoDB


Infrastructure: AWS, Cloudflare, GCP, Vercel, Docker

Available for: Full-time contracts, part-time ongoing, project-based work


  • Portuguese

    Native or bilingual

  • English

    Fluent

Can work on-site
Porto (up to 50km)

Experience

  • Bondhabits
    CTO & Lead Full-Stack Developer
    DIGITAL AND IT
    January 2023 - January 2025 (2 years)
    As the CTO & Lead Developer at Bondhabits, I played a key role in leveraging the Bondlayer platform to deliver high-performance digital solutions for some of the largest clients in Portugal across various industries. My responsibilities included maintaining and scaling the infrastructure, ensuring reliability and efficiency while handling complex projects with high demands, enhancing its capabilities to meet the specific needs of enterprise clients—ranging from custom integrations to advanced performance optimizations.

    I worked closely with multi-disciplinary teams, including designers, marketers, and business strategists, to ensure seamless integrations and custom developments tailored to each client’s needs.

    Through my role, Bondhabits successfully delivered robust multilingual, data-rich, and scalable web and mobile solutions, proving the strength of Bondlayer as a powerful nocode development tool in real-world enterprise applications.

    Web & Mobile Agency where I Developed Several projects for the biggest brands in Portugal:

    Vodafone / NOS / Sonae / Galp / Serralves / Turismo Portugal / Coliseu / Continente / Superbock Group / Sportzone / Turismo Madeira / Governo Açores / Governo Português / Imagens de Marca / Havas / BBDO / Ivity / Imperial / Liga Portugal / CM Porto / Comissão europeia / Clube Criatividade Portugal
  • LOBA
    Full Stack Developer
    DIGITAL AND IT
    February 2025 - August 2025 (6 months)
    Porto, Portugal
    Sold my company (Bondlayer) to LOBA and acted as a Full Stack Engineer responsible for transitioning Bondlayer technology and the achieve the goals defined.
    • Support in technological and business decisions.
    • Ensure compliance with business development procedures.
    • Maintain and oversee several web and mobile projects.
    • Develop and optimize integrations and imports within the Bondlayer platform.
    • Proficient in JavaScript/TypeScript, both frontend and backend (React/ Nodejs), and mobile app development.
    Node.js JavaScript Typescript PostgreSQL Cloud computing
  • Bondlayer
    CTO & Lead Full-Stack Developer
    February 2014 - January 2023 (8 years and 11 months)
    As the CTO & Lead Full-Stack Developer at Bondlayer, I led the technical vision and development of a powerful nocode platform, positioning it as a strong competitor to Webflow. I was responsible for architecting scalable solutions that enabled users to build multilingual websites and mobile-native applications with advanced capabilities. Bondlayer stood out with its powerful data filtering, sorting, and search features, allowing for highly dynamic and customizable experiences. Additionally, it supported complex integrations and native mobile functionalities, making it a versatile tool for developers and
    designers alike. My role involved guiding the team, optimizing performance, and ensuring that Bondlayer remained at the forefront of nocode innovation

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Education

  • BSc Software Engineering
    ISTEC
    2008

Skill set

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