Custom software solutions forged for success.
17+ years building reliable Desktop and Web Apps with .Net, WPF, React, Python & C++.
Services
Web Apps
Design & build fully containerized full‑stack web platforms — from focused MVPs to scalable production systems. Opinionated where it helps, flexible where it counts.
- Frontend: React, Next.js, Svelte – accessible & performant
- Backends & APIs: .NET Core, Next.js, Flask - robust & lightweight
- Containerization: Docker & Compose - Kubernetes‑ready architecture
- Data: SQL / NoSQL - document or relational
Desktop & Mobile Apps
High‑quality native & cross‑platform applications that feel fast, stable and trustworthy — from internal tooling to customer‑facing products.
- Desktop: WPF (.NET) MVVM - rich UI & accessible
- Cross‑platform desktop: Electron - secure IPC & auto‑updates
- Mobile: React Native or Swift - shared logic or native iOS polish
AI Integration
Embed practical AI into existing products & operations — safely, measurably, and aligned with your data governance.
- RAG systems: vectorized knowledge bases (pgvector, Pinecone) for internal docs
- Internal chatbots: secure Q&A over policies, SOPs & product guides
- AI agents: appointment scheduling, support triage, lead qualification
- Automated SEO: research, content briefs, structured metadata suggestions
About
I’m Sergio — solo founder of Fëanor’s Code. I build robust back-end services, elegant UIs, and pragmatic software solutions with a focus on clarity, stability, and maintainability.
Beyond traditional development, I help small and mid-sized companies leverage Retrieval-Augmented Generation (RAG) to enhance employee productivity. From custom internal knowledge assistants to automated document workflows, my mission is to bring practical AI tools to teams that want real results — without unnecessary complexity.
Expect senior-level communication, pragmatic decisions, and code built to last.
Let’s build something
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