Web. Backend. Mobile. AI.
One person designs and builds. Simple solutions, not over-engineered ones.
Fast, accessible web apps with React, Next.js, and TypeScript. Front ends that load quickly, hold up on cheap phones, and don't fall apart when the design changes.
I handle the details most skip: real loading states, keyboard navigation, sensible error handling. I design and build, so nothing gets lost in translation.
Start a web projectAPIs and services built with Node.js, TypeScript, and Postgres. Java/Spring or Python when the job needs them.
Boring infrastructure is the goal: predictable, tested, cheap to run. I'd rather spend an extra day on the schema and tests than firefighting production. You get documentation and code your team can maintain.
Talk through your backendCross-platform iOS and Android apps with React Native: one codebase, not two. Strong fit when you want to move fast and your app isn't pushing hardware limits.
When a feature needs native code, I'll tell you. The right tool beats the convenient one.
Plan a mobile appAI features that ship, not demos. RAG, embeddings, LLM integrations on your data, using OpenAI, Anthropic, or Gemini, whichever fits. I write up my stack on the blog.
I push back when AI isn't the right tool. Most "add AI" requests are better solved with plain code. Saying so saves money.
Scope an AI featureFrom first call to production in four steps.
Free 20-minute call on goals, timeline, budget. You get a written proposal with milestones and an honest note on scope creep.
I sketch the architecture and key screens so you see it before I code. Cheaper to change your mind on paper than in production.
Weekly sprints with live demos. You see real progress every week and steer as we go, no waiting months for a big reveal.
Tested, shipped. Warranty window for bug fixes, plus optional maintenance retainer if you want ongoing support.
What clients and managers say about delivery, leadership, and working together.
I can recommend Roger as a very clever programmer who was always able to contribute very good suggestions in order to find fast solutions for any problems that occurred with our project. The project was finished on time. Thank you for your effort on the team.
Roger has the competencies needed to lead teamwork. His strengths are his technical experience in software development and his ability to meet project objectives in every phase. He is a serious, responsible professional with an excellent relationship with his colleagues.
Roger has very high technical skills that he applies day to day. I learned a great deal from him technically, and it was a pleasure to work together on the same project.
Standard web apps: $5K–$25K. AI integrations: $3K–$15K. You get a written estimate after a free call and full ownership of the code and documentation.
Within a day for new inquiries. On active projects, I share progress regularly and stay reachable on whatever channel you prefer.
Yes. Fluent in English and Spanish, comfortable across time zones. I adapt to hours that work for you.
React, Next.js, TypeScript, Node.js, Python, RAG, and embeddings. Also deep on Drupal, Java/Spring, and Rust. I pick the tool the problem needs, not the one I prefer.
Yes: maintenance retainers, a warranty window for bug fixes, and ongoing support. The goal is always code your team can run without me.
Milestones: discovery, design, development, testing, delivery. Payments tie to milestones so you know what you are paying for.