Hello,

I design and build production systems people rely on.

Fifteen years of engineering across web and mobile. Solo zero‑to‑one platforms. Engineering teams of fifteen. The full arc — from product idea to architecture to the system in production, still running.

I help companies integrate AI into their own processes — custom integrations into existing systems, workflows and data, not bolted‑on chat widgets. The hard part isn't the model; it's everything around it.

Senior on the stack — Ruby on Rails, React, React Native. The last two years I've spent integrating GPT‑4 and Claude into production backends with the cost discipline and SLOs to back it.

2026 — now Agent Ops · Remote

Toptal

Senior Engineer · Agent Ops

Senior engineering in Agent Ops — building and operating production AI agent systems. The infrastructure, evaluation, observability and reliability work that takes agents from prototype to scale, with the SLOs and cost discipline to back it.

  • LLM agents
  • Evaluation
  • Observability
  • Production AI
  • Reliability
Founder & CTO · Barcelona

Human Limits

Founder & CTO — digital wellness platform

Solo‑built a digital wellness platform from zero to launch. Rails backend, React web, native iOS and Android. Designed and shipped the video streaming infrastructure, Stripe subscription billing, and the content pipeline end‑to‑end.

  • Ruby on Rails
  • React Native
  • Stripe
  • Video streaming
  • iOS · Android
2025 — 2026 Tech lead · Remote

OnTheGoSystems

Senior Engineer & Technical Lead — AI translation systems

Architected LLM‑powered translation pipelines integrating GPT‑4 and Claude with a Rails backend — distributed job queues, caching, rate‑limiting and observability.

  • GPT‑4
  • Claude
  • Rails
  • Sidekiq · Redis
  • Observability
2017 — 2024 Senior engineer & TPO · Zurich

Farmy

Senior Engineer & Technical Product Owner

Led backend and platform evolution for Switzerland's largest online grocery, serving 100K+ active users. Drove the monolith‑to‑modular transformation, mentored a team of eight engineers, established review and CI/CD culture, and cut response times by 60%.

  • Ruby on Rails
  • Kotlin · iOS
  • PostgreSQL
  • Caching · Performance
Founder & CTO · Barcelona

OPEN

Founder & CTO — multi‑tenant SaaS

Founded and built a multi‑tenant SaaS booking platform serving 50+ studio clients. Full lifecycle — idea to MVP to scale. Designed payments, scheduling, and the real‑time sync layer end‑to‑end across web and native mobile.

  • Ruby on Rails
  • Next.js
  • React Native
  • Multi‑tenant SaaS
Backend
Ruby on Rails, Node.js, TypeScript, Java, Kotlin, Swift
Frontend & Mobile
React, Next.js, React Native, native iOS, native Android
Data & Infra
PostgreSQL, Redis, Docker, Firebase, Vercel, CI/CD pipelines
AI & LLM
GPT‑4, Claude, prompt design, rate‑limiting, batching, quality loops, observability
Domain
Stripe, video streaming, real‑time systems, multi‑tenant SaaS, payments
Practice
Architecture review, hiring, mentoring, roadmap, delivery
© 2026 Nik Gudkovs Built in Barcelona · nikgudkovs.pro
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