Eugene The Engineer

Libertarian. Mustachioed code engineer. R&D Teamlead. Sailor. Music swimmer. ENTP

[Eugene The Engineer @EugeneLeontev]

Senior/Lead Backend Engineer looking for my next role.
I build systems that don’t just work – they scale, perform, and drive business results.

[Eugene The Engineer @EugeneLeontev]

Most Rails apps store balances.

Production systems store transactions.

I wrote a practical guide to building a minimal, production-ready double-entry ledger in Rails.

https://t.co/w5BQb9Gngs

[Eugene The Engineer @EugeneLeontev]

I just published Your Billing System Isn’t an Accounting System https://t.co/mlLa5fx6zh

[Eugene The Engineer @EugeneLeontev]

That viral post wasn’t magic.
It was the result of 80+ previous posts that trained my thinking and writing.
The jump is just the moment the market finally notices the work that was already done.
Keep shipping.
What goal are you currently grinding through the flat part on? 👇

[Eugene The Engineer @EugeneLeontev]

3 months ago I started posting on LinkedIn.
For most of that time — almost nothing. Slow growth, tiny numbers, quiet feedback.
Then one post exploded.
Look at the analytics: 231k impressions in 3 days. The curve was flat for weeks… and then went vertical almost overnight.

[Eugene The Engineer @EugeneLeontev]

Don’t stop when the curve is flat.
The explosion doesn’t come to those who quit on day 87.
Keep depositing into the system.
Compound interest eventually shows up in public.

[Eugene The Engineer @EugeneLeontev]

@asubbotin Wow!
Congratulations! Launching a product you’ve been working on for so long is truly a big moment.

[Eugene The Engineer @EugeneLeontev]

@glovo In the app, when I check out, the fish I just added to my cart gets removed.
The vibe coders have made their way here too :)

[Eugene The Engineer @EugeneLeontev]

@vivoplt Opencode

[Eugene The Engineer @EugeneLeontev]

@durov E2E usually holds only until you introduce backups as a separate trust boundary.
In production systems, the “secure core + insecure edges” pattern shows up surprisingly often.

[Eugene The Engineer @EugeneLeontev]

@tshemsedinov Я не раз сталкивался с такой ситуацией:
команды внедряют ИИ, чтобы ускорить работу, но уже через несколько месяцев тратят больше времени на разбор кода, чем на разработку новых функций.
Узкое место незаметно смещается с написания кода на его понимание.

[Eugene The Engineer @EugeneLeontev]

@levie Headless sounds great until you try to make 5+ agents reliably act on the same system. That’s where contracts, idempotency and failure handling suddenly matter more than the model itself.

[Eugene The Engineer @EugeneLeontev]

If you’re hiring – let’s talk.
If not – a retweet would mean a lot 🙏

[Eugene The Engineer @EugeneLeontev]

Senior/Lead Backend Engineer looking for my next role.
I build systems that don’t just work – they scale, perform, and drive business results.

[Eugene The Engineer @EugeneLeontev]

Looking for Senior/Lead Backend roles
(fintech, infra, high-scale products)