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NewIn release 2.4, the Reliability Agent reads Sentry traces and Playwright reports
Yamnik · Company01

We dig.You ship.

We spent five years making slow apps fast by hand. Then we taught agents to do it.

The name02

Why
Yamnik?

Jamnik is Polish for dachshund, a dog bred to go underground and come back with something.

Our agents do the same in your codebase. They read the stats file, the trace and the flaky test everyone reruns, and come back with a measured fix.

We kept the Y so English speakers say it right, and the stubbornness because performance work needs it.

Principles03

  1. Measure both ends

    Every change starts with a baseline, and every claim needs an after number.

    01

  2. Small and reversible

    One gain per pull request, sized for a short review and a one-click revert.

    02

  3. Humans merge

    Agents do the digging. People decide what reaches production, and they own that decision.

    03

From playbooks to agents04

How the fleet
was built

  1. 2020 to 2022Blue OwlContent pages turn a paid-traffic store into an organic one.→ Growth Agent
  2. 2022 to 2024FujitsuA from-scratch SAP dashboard makes core tasks 3× faster.→ Flow Agent
  3. 2024CrustlabReplaced an undocumented provider and cut TTI from 7 s to 2 s.→ Vitals & Reliability
  4. 2026Wakacje.plCut a 1.8 MB bundle to 500 KB and cold builds by 55%.→ Bundle & Build
  5. Since 2026YamnikSix agents built from those playbooks, running on every commit.Release 2.4
Founder05
Portrait of Damian ŻygadłoFounder

Damian Żygadło

"I make slow apps fast. Yamnik is how I stop doing it one codebase at a time."

Senior frontend engineer with five-plus years of React, TypeScript and Next.js across travel, e-commerce, iGaming and enterprise tooling. Led a three-person team at Fujitsu, migrated Crustlab off an undocumented provider with zero downtime, and cut Wakacje.pl's bundle by 72%.

Co-founded beWebDev and ran its Code Review series. Each episode read a real junior codebase on camera and showed how a senior reasons about it. The mentoring continues in two Discord communities.

Code Review views
15,000+
Videos
23
Lifetime visits
50,000+
Juniors hired
5
zydev.pl LinkedIn GitHub YouTube

(06) Work with us

Like measuring
things?

We are not hiring for open roles yet. If you are a senior engineer who gets excited by flame graphs and before-and-after numbers, say hello anyway.

hello@zydev.pl
Next step07

Bring us your
slowest page.

Start with a two‑week audit.

Fixed priceYour CI, your codeBook the audit

We connect the fleet to one repository for two weeks. You get a ranked list of gains in euros and the first pull requests, already open.