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GTM Engineer · Belgrade, Serbia

I build the machines that fill B2B pipelines.

I am a GTM engineer. I take a company's idea of its best customer and turn it into a working system: the list, the data behind every row, the copy each segment gets, the sending infrastructure, and the automation that keeps all of it alive after launch.

Most of my work runs at Prospeqt, where I do this for several clients at once. The part I like is the plumbing - the enrichment waterfalls, the routing logic, the gates that stop a bad row from ever reaching a real person.

What I do

Lead data and enrichment
Sourcing, cleaning, and enriching lists so every row carries the signals the copy needs. Waterfalls across providers, verification, and hard gates before anything is sent.
Cold email infrastructure
Domains, inboxes, warmup, sending schedules, and deliverability monitoring. Built so volume can grow without burning the sending reputation.
Segmentation and copy systems
Splitting a market into segments that deserve different messages, then wiring each segment to its own sequence with variables that are always populated.
Automation and internal tools
Scrapers, APIs, dashboards, and scheduled jobs that replace the manual steps - so the system reports on itself instead of needing someone to check it.

Selected work

  • Multi-client outbound engine

    Clay, Instantly, EmailBison

    One Clay architecture serving several clients at once: a company hub feeding per-segment people tables, each pushing into its own sequencer campaign behind deliverability gates.

  • Campaign QA harness

    Python, REST APIs

    A three-layer check that runs before any campaign goes live - variable presence, segment routing, and copy quality - so broken merge fields never reach a prospect.

  • Outreach dashboard

    Python, Supabase, Render

    A single view of sending volume, reply rates, and lead runway across every client and both sequencers, refreshed on its own schedule.

Tools I build with

  • Clay
  • Instantly
  • EmailBison
  • Python
  • Playwright
  • Astro
  • FastAPI
  • Supabase
  • Postgres
  • Render
  • DigitalOcean
  • Claude

Writing

All posts

Let's talk

If you are trying to build outbound that survives past the first campaign, write to me. I answer everything.

mihajlo@prospeqt.co