Dan Rybalkin · Product & systems engineer

Building systems
for the real world.

Networks, payments, AI agents, and the products that make them useful.Explore ↓

I turn ambiguous ideas into working products.

Generalist software engineer with around ten years across product development, infrastructure, networking, payments, AI systems, and business operations. I move comfortably from architecture to interface to production.

What I do

  • Zero-to-one product engineering
  • Backend architecture and distributed systems
  • Financial workflows and payment infrastructure
  • Applied AI, agents, memory, tools, and retrieval

Tools I reach for

Go, Rust, TypeScript, Python, React, PostgreSQL, Redis, Docker, Linux, TCP/IP, cryptography, LLM tooling.

Experience

Fleets s.r.o.Full-stack engineer / CRM owner · 2025—now

Built and operate a fleet-management and driver-payout platform, automating imports, commissions, debt, SEPA payments, invoices, and reporting.

TapJets LLCCharter sales & flight operations · 2022—2023

Managed high-value charter workflows across US and European markets, from aircraft sourcing and bookings to live flight coordination.

IndependentFull-stack developer · 2018—2022

Delivered websites, ecommerce products, internal systems, integrations, and technical operations for small businesses.

Pegas TelecomISP technical support · 2017—2021

Resolved connectivity incidents and handled subscriber and network operations.

Selected projects

See all on GitHub ↗

Want to build something difficult?

Email is best. Telegram works too.