About
Sérgio Oliveira - Porto, Portugal
Identity
Full Stack Engineer & Technical Architect with 15+ years building scalable systems. Focused on Architectural Design and AI-Augmented Development.
My Path in Code
My love for programming began as a kid, writing my first lines of code on a dusty old IBM 386 in the early 90s. What started as curiosity quickly became a lifelong passion, building games, automating tasks, and exploring the endless possibilities of software. Over the years, this fascination grew into a career dedicated to solving complex problems and architecting systems that last. I still get the same thrill from shipping a new feature or debugging a tricky bug as I did when I was a kid.
I consider myself a true generalist. Beyond the frontend & backend development, I have personally handled the full UI/UX for numerous websites and applications. I believe that technical excellence is wasted if the user experience is poor. I prioritize clean, beautiful interfaces and intuitive workflows, ensuring that the underlying architecture supports a seamless and high-quality end-product.
Co-Founded and led engineering at startup for 10 years, architecting a visual IDE from concept to production.

The Perspective
I spent over a decade as Co-Founder and Lead Engineer at Bondlayer, a pioneering no-code platform built before the no-code space even existed. Bondlayer empowered designers to create web and native mobile apps visually, without writing code. It featured the world's first Multilingual CMS in a visual nocode tool, advanced data filtering, sorting, and capabilities that remain unique today. I managed a team of frontend designers and together we powered hundreds of sites and apps for the most demanding customers in Portugal and Europe.
At Bondlayer, I built everything on a JSON-based virtual layer that describes design and data relationships, a pattern that aligned perfectly with React's virtual DOM when it launched in 2013, the same year we started exploring these mechanisms. This foundation shaped my deep expertise in JavaScript, functional programming with immutable data structures, and component-driven architecture. I architected distributed systems in AWS, leveraged edge functions, and used cutting-edge database features like JSONB in PostgreSQL to achieve NoSQL-like flexibility with relational guarantees. I also built extensive Node.js infrastructure, multiple servers, backend logic in JavaScript, and micro functions deployed to Lambda and other cloud services, including robust REST APIs and legacy system integrations.
My career has been driven by a lifelong passion for the intersection of web and mobile. Long before the "App Store" was a household name, I was exploring the boundaries of multi-platform delivery, transitioning from the early days of WAP sites to the breakthrough of CSS3 responsive design as soon as it emerged. This obsession with bridging the gap between screens led me to pioneer the Portuguese mobile scene in 2009. I launched some of the first hits on the iOS and Android stores, including SCUTS (a vital tool for calculating highway tolls) and moveOporto (the first insider’s digital guide to Porto). These successes caught the attention of industry leaders, leading to over a decade of collaboration with major telecom companies like NOS and Vodafone, where I shipped flagship mobile experiences. To maximize efficiency without sacrificing quality, I mastered the "write once" paradigm, initially through Titanium Mobile and eventually becoming a React Native enthusiast. Since 2009, I have shipped hundreds of apps, always seeking that perfect synergy between web-based logic and native performance.
Today, I bring that product engineering experience into senior individual contributor roles and strategic consulting engagements, helping companies build systems that last while maintaining velocity.
I'm particularly passionate about the intersection of AI and software architecture, not replacing developers, but augmenting our ability to focus on what matters most: system design, edge cases, and long-term maintainability.
Road to the Future
Over two decades navigating web evolution, from BASIC, C, and CGI/Perl to the modern era of TypeScript and AI-augmented development. Each transition shaped how I approach architecture today.
Scalable Infrastructure
Architecting distributed systems on AWS, leveraging edge functions and Lambda for high-velocity deployment.
Data Strategy
Advanced PostgreSQL features like JSONB to achieve NoSQL flexibility with relational integrity.
System Longevity
Building robust REST APIs and modernizing legacy systems for seamless interoperability.
The Path Forward
I believe AI's true power lies in augmenting our ability to focus on what matters most: intentional system design, handling complex edge cases, and ensuring long-term maintainability.
Not replacing developers, amplifying expertise.
Career Timeline
Download CVFull Stack & AI Consulting
Strategic Engineering & AI Integration · Aug 2025 – Present Bridging the gap between legacy systems and the future of intelligent software.
Operating at the intersection of high-level strategy and hands-on execution, I help startups and established businesses integrate Artificial Intelligence into their core products. I leverage my decade of experience as a founder to ensure that AI isn't just a "feature," but a scalable driver of business value and operational efficiency.
Key Technical Pillars:
AI Strategy & Orchestration: Consulting on the strategic integration of LLMs (OpenAI, Claude, and local open-source models) into existing workflows. I specialize in moving beyond simple chatbots to create "Agentic" workflows that automate complex manual processes.
Architecture for Intelligence: Designing "AI-Ready" data infrastructures. This includes implementing RAG (Retrieval-Augmented Generation) patterns and architecting Vector Database solutions (Pinecone, Weaviate, or pgvector) to provide models with secure, proprietary context.
Full-Stack Execution & Prototyping: Rapidly building production-grade web and mobile prototypes. I ensure that AI-driven features—from semantic search to autonomous agents—are built on a foundation of scalable Node.js/React/React Native architecture.
Technical Thought Leadership: Authoring deep-dive technical insights. I mentor teams on modernizing their stack, specifically focusing on moving from rigid legacy CSS/Sass mentalities to AI-assisted, component-driven development.
Technical Environment:
AI/ML: OpenAI API, LangChain, RAG Architectures, Vector Databases, Prompt Engineering.
Full Stack: React, Next.js, React Native, Node.js (TypeScript), Tailwind CSS.
DevOps: AWS, Docker, AI-assisted CI/CD.
Design Systems: Component-based abstraction, Design Tokens, AI-integrated UI kits.
Lead Web Engineer at LOBA
Following the acquisition of Bondlayer and Bondhabits, I was appointed as the Technical Lead to oversee the successful migration of a decade’s worth of intellectual property into the LOBA corporate environment. My focus was on ensuring business continuity, technical literacy for the new engineering team, and long-term architectural stability.
Key Technical Pillars:
Legacy Documentation & Knowledge Transfer: Led the monumental task of documenting 10 years of Bondlayer’s evolving codebase. Conducted deep-dive technical workshops and "code-safaris" to ensure LOBA’s engineers fully grasped the internal logic of the No-Code engine.
Orchestrated Technology Transfer: Managed the seamless transition of a complex SaaS platform into a new corporate infrastructure, achieving zero downtime for existing enterprise clients during the migration of databases and cloud services.
Strategic Business Alignment: Acted as a senior technical advisor to LOBA’s leadership, helping align the acquired technology with their long-term commercial goals and identifying new revenue opportunities within the existing stack.
High-Stakes Project Support: Maintained and optimized critical web and mobile projects for LOBA’s top-tier clients, utilizing Node.js, React, and AWS to manage high-volume data imports and ensure platform scalability during the transition.
Team Onboarding & Mentorship: Facilitated the handover of client relationships and technical workflows to new internal teams, acting as the primary point of contact for complex troubleshooting and architectural advice.
Technical Environment:
Stack Ownership: Node.js (Express), React, React Native, PostgreSQL (JSONB).
Cloud & DevOps: AWS (Migration & Optimization), Docker, CI/CD.
Methodology: M&A Technology Integration, Technical Documentation, Change Management.
Co-Founder & Lead Engineer at Bondhabits
As the Lead Engineer at Bondhabits, I was the architectural bridge between the Bondlayer No-Code engine and the high-stakes requirements of enterprise clients. I was responsible for evolving the platform's capabilities to handle custom integrations, massive data migrations, and the strict security standards of the corporate world.
Key Technical Pillars:
Enterprise Customization: Engineered the "last-mile" of development for major brands, building custom React components and Node.js middleware to extend the core platform beyond its standard limits.
System Integration: Designed and implemented complex API bridges between the Bondlayer ecosystem and legacy enterprise systems (ERPs, CRMs, and custom databases) for clients like Vodafone, Galp, and NOS.
Infrastructure Management: Scaled and optimized AWS cloud environments to handle massive traffic spikes during national-scale marketing campaigns and government-led digital initiatives.
Technical Strategy & Consulting: Acted as a Fractional CTO for internal marketing and business teams, translating high-level vision into scalable technical roadmaps and ensuring production-grade stability.
Technical Environment:
Full-Stack: React, Node.js, TypeScript, PostgreSQL (JSONB).
Mobile: React Native, Native API Integrations.
Cloud & DevOps: AWS (EC2, S3, RDS), Docker, Cloudflare, CI/CD.
Architecture: Headless CMS patterns, Microservices, API Orchestration.
The Portfolio: Delivering for the Giants
I led the development and deployment of robust web and mobile solutions for a portfolio of the most recognized brands in Portugal, including: Vodafone / NOS / Sonae / Galp / Continente / Sportzone / Governo Português / Governo Açores / Comissão Europeia / Turismo Portugal / Serralves / Coliseu / Superbock Group / Imperial / Liga Portugal
Co-Founder & Lead Engineer at Bondlayer
Architecting a globally competitive, high-performance No-Code SaaS engine for web and native mobile ecosystems.
As the technical co-founder, I spent 9 years leading the end-to-end development of a platform designed to provide the flexibility of hand-coding with the speed of visual development. I was responsible for the core engine that empowered users to build complex, multilingual native mobile apps and websites without writing code.
Key Technical Pillars:
The Core Data Engine: Engineered a highly flexible schema system using PostgreSQL and JSONB, allowing for dynamic data modeling that functioned like a NoSQL database while maintaining relational integrity.
Universal Rendering Engine: Architected a unified logic layer using React (Web) and React Native (Mobile), ensuring that complex features like data sorting, deep-level i18n, and native device functionalities worked seamlessly across all platforms.
Enterprise-Grade i18n: Built a robust internationalization system from the ground up, supporting complex SEO routing, localized content, and RTL (Right-to-Left) support at the database level.
Advanced Search & Filtering: Developed high-performance server-side filtering and search capabilities using Node.js, capable of handling large-scale enterprise data collections with sub-second latency.
DevOps & Infrastructure Ownership:
Cloud-Native Architecture: Designed and managed a resilient AWS environment (EC2, S3, RDS, Lambda) to handle high-concurrency traffic across thousands of tenant environments.
Containerization & Orchestration: Implemented Docker and Kubernetes to ensure environment parity and horizontal scaling as the platform grew.
Security & CI/CD: Established automated testing and deployment pipelines, while implementing strict security protocols (WAF, SSL management, and data encryption) to protect enterprise-grade user data.
Technical Stack Breakdown
Frontend React, Redux, Tailwind CSS, Styled Components, JavaScript (ES6+), TypeScript
Backend Node.js (Express/Nest), RESTful APIs, WebSocket, Python
Mobile React Native, Native Modules (Swift/Java), Expo
Database PostgreSQL (Relational + JSONB expert), Redis (Caching)
DevOps & Cloud AWS, Kubernetes, Docker, Terraform, Cloudflare (CDN/WAF), Linux
Testing/Workflow Git (GitFlow), CI/CD (GitHub Actions), Jest, Agile/Scrum
Frontend Developer at ROFF Consulting
At ROFF, a global leader in SAP implementation, I operated within the JUMP internal agency. My role was focused on bridging the gap between rigid enterprise ERP systems and the burgeoning mobile era, developing high-performance tools for corporate environments.
Key Technical Pillars:
SAP Mobile Integration: Pioneered the development of internal enterprise applications using Titanium Mobile, specifically designed to interface with SAP backends. This involved mapping complex business logic and ERP data structures into intuitive mobile interfaces.
Native Android Development: Engineered custom mobile solutions using Java (Android SDK), focusing on performance-critical applications that required deep integration with hardware and local databases.
Web Agency Excellence (JUMP): Delivered high-stakes web projects using PHP and jQuery, utilizing and extending proprietary internal frameworks to build responsive, data-driven portals for corporate clients.
Database Design: Architected and optimized PostgreSQL databases to handle the synchronization of offline mobile data with centralized enterprise systems.
Technical Environment:
Mobile: Titanium Mobile, Android (Java), iOS development.
Web & Backend: PHP, jQuery, JavaScript, Internal Web Frameworks.
Data & Systems: SAP Integration, PostgreSQL, Database Design.
Methodology: Enterprise technology consulting and agile delivery within a specialized agency unit.
Mobile Developer at AppGeneration / NDrive
As the Lead Developer, I spearheaded the technical execution of dozens of mobile applications that achieved massive commercial success. My role was dual-focused: building the robust, scalable backends required for national telecommunications providers and delivering high-performance cross-platform mobile experiences.
Key Achievements & Responsibilities:
App Store Success: Developed and launched dozens of applications that consistently hit the "Top Charts" in the App Store, both for AppGeneration’s internal product line and for external Tier-1 Telecommunications clients.
Scalable Backend Architecture: Designed and maintained complex, high-concurrency backends using Python and Django, backed by PostgreSQL. These systems handled massive surges in user traffic and data processing for telco-grade services.
Mobile Innovation: Pioneered cross-platform development during the early mobile boom, utilizing Titanium Mobile and Cordova to deliver native-feel experiences with a single codebase.
Responsive Web Pioneer: Architected "Web Responsive" mobile sites using jQuery Mobile, ensuring seamless user experiences across the fragmented mobile browser landscape of the time.
Infrastructure Management: Overcame the challenges of early mobile infrastructure, implementing caching layers and optimizing database queries to ensure low-latency API responses for mobile clients.
Technical Environment:
Backend: Python, Django, PostgreSQL, REST APIs.
Mobile: Titanium Mobile (Appcelerator), Cordova (PhoneGap), Native iOS/Android bridging.
Frontend: HTML5, CSS3, JavaScript, jQuery Mobile.
Systems: Linux Server Administration, Nginx, Gunicorn
Full Stack Developer at Ideias com pernas
Originally a video and media-focused company, Ideias com Pernas expanded into the digital space under my technical leadership. I was responsible for architecting their first-ever mobile offerings and building the foundational software that allowed the company to offer integrated web and mobile services to their high-profile client base.
Key Technical Pillars:
Digital Transformation: Acted as the sole Technical Lead responsible for building the company’s web and mobile department from the ground up, moving the business from pure media production to a holistic digital agency model.
First-Gen Mobile Development: Engineered the company’s first suite of mobile applications using Titanium Mobile, delivering native-quality experiences for iOS and Android at the dawn of the app store era.
Proprietary CMS Development: Architected and developed a custom, internal CMS (Content Management System) using PHP and PostgreSQL. This platform was designed specifically for non-technical media clients to manage their digital assets and web presence with ease.
Integrated Media Solutions: Developed specialized web services that integrated high-quality video content with interactive web elements, providing a competitive edge in the creative film industry.
Technical Environment:
Mobile: Titanium Mobile (Cross-platform iOS/Android), Native SDK bridging.
Web & Backend: PHP, JavaScript, PostgreSQL, Custom CMS Architecture.
Integration: REST APIs, Media Streaming integrations, Database Design.
Leadership: Technical Strategy, Client Consulting, and Departmental Growth.
Freelancer
During the formative years of the modern web, I operated as an independent consultant, helping businesses transition from static brochures to dynamic, data-driven applications. I specialized in building bespoke CMS systems and interactive user interfaces using the cutting-edge frameworks of the time.
Key Technical Pillars:
Bespoke CMS Architecture: Designed and deployed custom Content Management Systems tailored to specific business workflows, moving away from "one-size-fits-all" solutions to provide better performance and user autonomy.
PHP Ecosystem Mastery: Leveraged the full evolution of PHP frameworks, moving from early custom scripts to Zend Framework, Symfony, and CodeIgniter to build secure, MVC-compliant web applications.
Early Adoption of Python/Django: Recognized the power of "The Web Framework for Perfectionists with Deadlines," transitioning several high-complexity projects to Python and Django for better maintainability and rapid scaling.
Frontend Evolution: Pioneered rich internet applications (RIAs) by adopting early JavaScript frameworks like Backbone.js and Ember.js, bringing desktop-like interactivity to the browser long before the rise of React.
Full-Cycle Delivery: Managed the entire product lifecycle, from client discovery and database design to server deployment and security hardening.
Web Developer at Seara.com
Then the undisputed leader in the national web landscape, I worked at the cutting edge of Web 1.0/2.0 transition. I balanced a full-time engineering role during the day with university studies at night, mastering the art of high-volume delivery under the strict technical constraints of the era.
Key Technical Pillars:
High-Profile Delivery: Developed and maintained dozens of the most visited websites in Portugal, navigating the complexities of cross-browser compatibility during the "IE6 Era."
The PSD-to-Code Era: Mastered the precision of pixel-perfect implementation, transforming complex Photoshop designs into semantic (for the time) HTML and CSS, utilizing advanced techniques like "0x0 spacer gifs" and table-based layouts before the shift to Div-based design.
PHP4 & Zend Framework: Specialized in PHP4 and was an early adopter of the Zend Framework, building robust backends for some of the first true "Web Applications" in the country.
SaaS Foundations: Contributed to the development and maintenance of Seara’s proprietary internal CMS, which powered a significant portion of the Portuguese corporate web.
Resource Optimization: Developed deep expertise in performance optimization for low-bandwidth environments, ensuring high-speed delivery for data-heavy portals.
Technical Environment:
Backend: PHP4, PHP5 (transition), Zend Framework.
Frontend: HTML, CSS, JavaScript (Pre-jQuery), XML.
Database: MySQL, Database Normalization.
Design Implementation: Adobe Photoshop, Pixel-perfect CSS, Cross-browser testing (IE6, Firefox 1.0).
Specialization
Architectural Logic
SaaS Engineering
AI Integration
Systems & Ops
Open for Engagement
Looking for senior-level full stack engineering or architectural consulting?
Start conversation