01 · agentic
Agentic AI Workflows
Multi-step agents that read, reason and act. Tool calling, state graphs, retry policies and human-in-the-loop checkpoints.
VVNot taking new projects · Oviedo, ES
I build products.
I ship agentic AI.
Fullstack web developer & AI automator. Next.js, Nest, FastAPI on one side — agents, RAG and real-time AI on the other. From prompt to production, end to end.
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workflow
support.triage.v3
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RAG indexed
12,842 docs · 96.4%
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deploy
2m 14s · success
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years building production AI
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projects shipped
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languages spoken
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uptime across deploys
Currently · Pasiona, Barcelona
2y+ Fullstack & AI
AboutEngineer first.
Engineer first.
Agent whisperer second.
I'm Vladyslav — a fullstack developer who fell hard for AI engineering. I build the boring infrastructure agents need to be useful: tool calling, retrieval, evals, observability, graceful failure.
Before software, I spent five years as a deck officer on cargo ships — watch-keeping, GMDSS, safety drills. That background taught me to design for the bad day, not the demo. Today I ship at Pasiona(Barcelona) on a real-time AI platform, and consult on automations for teams who'd rather move than meet.
Services
What I build for teams.
Six focused offers. Each one shipped from architecture to production, with evals, monitoring and handoff docs included.
02 · retrieval
RAG Systems
Search that grounds answers in your data. Chunking strategy, hybrid retrieval, reranking and citation-first output.
03 · automation
Process Automation
Connect the boring tools. n8n, Make, custom Node workers — triggered by webhooks, schedules or events. Idempotent by default.
04 · platforms
Fullstack Platforms
Next.js / Nest.js / FastAPI products with auth, payments, dashboards and the analytics your stakeholders actually read.
05 · realtime
Real-time AI UX
Streaming UIs, voice-in / voice-out, server-sent events, optimistic state. Latency under 400 ms or it didn't ship.
06 · integrations
OAuth & API Plumbing
Stripe, Google, HubSpot, Slack — secure OAuth flows, webhook handling, retry queues and the audit trail your compliance team asks for.
Stack
Tools I reach for.
A pragmatic stack — TypeScript and Python where each one wins. No framework loyalty, just the fastest path to a reliable system.
// Frontend
Reactexpert
Next.jsexpert
TypeScriptexpert
Angularadvanced
Tailwind / shadcnexpert
// Backend
Node.jsexpert
NestJSexpert
FastAPI · Pythonadvanced
PostgreSQL · pgvectoradvanced
Redis · BullMQadvanced
// AI & Agents
OpenAI · Claude · Geminiexpert
LangChain · LangGraphadvanced
Vector DBs (Pinecone, Qdrant)advanced
Evals · LangSmithadvanced
MCP · Tool callingadvanced
// Infra
Docker · Composeexpert
AWS · GCPadvanced
n8n · Temporaladvanced
GitHub Actionsexpert
Stripe · OAuth 2.0expert
Path
From the bridge to the backend.
A non-linear path — five years at sea taught me to design systems for the bad day. Today I do the same with code.
Senior Tech Developer
Pasiona · Barcelona
Aug 2025 — Present
Hybrid · Barcelona, Spain
- Architected a scalable AI-powered platform with real-time communication and streaming UIs.
- Designed agentic features end-to-end: tool calling, retrieval, evaluation harness.
- Hardened auth + security; refactored the monolith into a modular service graph.
Fullstack Web Developer
Cognitive Experts · Madrid
Sep 2024 — Jun 2025
Madrid, Spain
- Built a comprehensive web platform with AI integrations and Stripe-powered subscription billing.
- Designed reusable React + TS component library, cutting feature-ship time by ~40%.
- Modeled DB schemas + CRUD pipelines; documented every endpoint for handover.
Fullstack Web Developer
ONG REMAR
Jun 2024
Community of Madrid, Spain
- Shipped a Next.js 14 web app + admin dashboard with Google Analytics + Mongo.
- Audited WordPress estate — SEO, performance, accessibility passes across 4 sites.
Third Officer · Deck Department
Epsilon Maritime Services
Mar 2017 — Aug 2022
Odessa Branch · Worldwide
- Bridge watch-keeping, cargo operations, GMDSS comms, safety drills.
- 5 years on cargo ships — the original real-time, high-stakes, no-rollback system.
Got a product to ship
or a workflow to automate?
Tell me what you need — a new platform, a tricky integration, an agent to take a manual process off your team. I'll come back with a concrete plan: scope, stack, evaluation, timeline.