Completed
Experience
Angelo Marques
Software Developer — Mobile, Web & AI
Building digital experiences that make an impact. From mobile apps to web platforms and AI-powered solutions, I turn ideas into products that work.
Services That Drive Results
From concept to deployment, I help businesses build digital products that work.
Custom App Development
End-to-end development for mobile applications and full-stack web platforms. I build responsive, performant apps tailored to your business needs.
SaaS Architecture & Engineering
Building scalable backend infrastructure and intuitive frontends for software-as-a-service products that grow with your business.
AI & Automation Integration
Implementing AI-driven tools to automate workflows, streamline processes, and create smart features that save time and money.
App Management & Maintenance
Ongoing support, optimization, and scaling for existing digital products. Keep your apps running smoothly and up-to-date.
Selected Work
PostFlow
Instagram creators lose conversions when followers comment for a link. Bio links add friction, manual DMs don’t scale, and most automation tools are overbuilt and hard to set up.
Full-stack SaaS: Meta OAuth → post URL + trigger keyword + DM message → real-time webhooks → fuzzy keyword matching → automatic Instagram private replies.
Kingdom Habits
Most habit trackers treat every day as a simple checkbox, but real routines need quantity tracking, long-term patterns, and honest date boundaries.
Designed and built a full-stack habit platform with one-click daily logging, optional quantity tracking, heat maps, and weekly analytics.
Production-ready app with complex SQL aggregations for streaks and monthly stats. Visual analytics turn raw logs into actionable feedback for long-term consistency.
Academic RAG API
Over 1,000 academic papers spread across hundreds of PDFs had no way to search by meaning or get trustworthy answers.
Built a RAG API that ingests PDFs, embeds content, and retrieves relevant passages with a database-backed AI system.
Indexed 1,000+ papers into a searchable knowledge base, cutting discovery from manual browsing to semantic queries in seconds.
Skills & Tools
Core Engineering
Frontend & UI/UX
Specialized Tech
Building Software That Works
I started learning coding at 16, building tools to solve problems I encountered daily. That early curiosity turned into a career focused on creating reliable, well-designed software.
Over the past five years, I've worked with startups and established companies to build products from scratch and scale existing platforms. I care about clean architecture, clear interfaces, and code that's maintainable long after the initial launch.
When I'm not coding, you'll probably find me at the gym, curled up with a good book, or trying to nail a chord on the guitar — usually not all at once.
Professional Timeline
Full Stack Developer
- Built web applications with React and Next.js on AWS (Lambda, DynamoDB, S3).
- Implemented digital document signatures and report generation with advanced SQL.
- Delivered an AI feature for reading and extracting data from documents.
Front End Developer
- Built high-performance, SEO-focused blog websites with semantic HTML and Next.js.
- Created a design system with Tailwind CSS for consistent UI across products.
Front End Developer
- Structured and documented routing for the web application.
- Mentored junior developers on React and TypeScript.