Senior Full-stack Developer building fast, scalable, AI-powered applications.
I specialize in turning complex ideas into production-ready systems - combining modern backend architecture, high-performance frontends, and practical AI.
Currently obsessed with Rust and AI-driven systems.
Clean architecture • scalable systems • practical AI
I help startups and teams move from idea → production → scale.
- ⚡ High-performance backends - REST APIs, GraphQL, WebSockets, real-time systems
- 🌐 Modern frontends - SSR, static generation, performance-focused UI
- 🤖 AI integrated into real products - RAG pipelines, embeddings, semantic search
- 🐳 Production infrastructure - Docker, CI/CD, cloud deployments
- 🧠 Technical leadership - architecture design, mentoring, clean code
Examples of systems I typically work on:
- ⚡ Real-time platforms handling thousands of events per minute
- 🤖 AI assistants powered by RAG and vector search
- 📊 Data processing pipelines for analytics and automation
- 🧩 Full-stack SaaS platforms
- 🔌 API ecosystems
- 📡 Realtime dashboards using WebSockets and streaming data
| Stack | Technologies |
|---|---|
| Frontend | React, Vue, Angular, Astro, TypeScript |
| Backend (JS/TS) | Bun, ElysiaJS, Node.js, Express |
| Backend (PHP) | Vanilla or Laravel Livewire when needed |
| Databases | PostgreSQL, MongoDB, Supabase, Redis, MySQL |
| Realtime | WebSockets, Server-Sent Events |
| AI / LLM | OpenAI, RAG pipelines, embeddings, Anthropic |
| DevOps | Docker, AWS, Cloudflare, Vercel, GitHub Actions |
| UI | TailwindCSS, Shadcn UI |
| Testing | Vitest, Playwright |
| Tooling | Bun, Vite, Biome |
I’ve also worked with legacy stacks — migrations and modernization are part of the job.
Typical architectures:
- RAG pipelines (chunking → embeddings → vector search → LLM response)
- Semantic search engines
- AI automation workflows
- Streaming AI responses
- Privacy-first deployments with local models
- Microservices
- Event-driven systems
- Serverless & edge architectures
- Distributed realtime systems
- API-first platforms
Focus: performance • scalability • maintainability
Open to:
- Freelance projects
- Senior engineering roles
- Consulting
- Technical collaborations
Especially around:
- AI products
- realtime platforms
- modern web architecture
⚡ I enjoy building fast systems, useful tools, and practical AI.
If you're working on something interesting — let's build it.
- Website: AndresSepar.com – Dev tips & AI experiments
- Codepen: AndresSepar – UI tinkering
- LinkedIn: Andres Separ – professional updates
- Company: Trovante – Innovative & disruptive software solutions
- If you enjoy my work, consider sponsoring me — it helps me build more open-source tools and experiments.