Project
lazarstankovic.dev
Sheet 1 of 4 · General arrangement · Niš, Serbia
Software built to survive its own launch.
I'm Lazar. Six years of backend and product engineering for banks, hospitals and insurers, now a one-man shop in Niš that takes a few commissions at a time.
NestJS · Next.js · PostgreSQLLLM integration into existing systemsAWS · Hetzner · TerraformClients abroad · CET
Fig. 1 · A system that survives its launch
Scale 1:1 · ISO 30° · Hover or tap to explode
Drawn by
L. Stanković
Company
DevLazar
Availability
Open
Latest note
Sheet 2 of 4 · Lab notes
Essays, tutorials, and the weekly Wire.
Note 072
The Wire · Infra · Nov 11 · 16 min
Vercel, Netlify, Cloudflare, Coolify, Dokploy: The Limits, the Meters and the Monthly Bill
CPU caps, memory ceilings, build limits and egress rates for five deploy targets, from their own docs as of November 11, 2026, plus two worked monthly bills. The meters differ more than the sticker prices.
Read →
Note 071
The Wire · AI · Nov 11 · 7 min
Gemini 4 Carbon Goes on Sale: Frontier Scores at Argon's Price
Google opened Gemini 4 Carbon to paying API developers and AI Ultra subscribers on November 10: $2/$10 per million tokens until November 30, then $4/$20, a photo-finish CursorBench lead, and a Signal proof run.
Read →
Note 070
The Wire · Infra · Nov 11 · 6 min
CoreWeave Beats, Raises, and Pays $846 Million in Interest
CoreWeave's third-quarter revenue rose 168% to $3.66 billion and guidance beat consensus, lifting a stock down 40% in a month. Underneath: a sixfold larger loss and an interest bill growing faster than sales.
Read →
Note 069
The Wire · Tooling · Nov 10 · 7 min
Node.js 26 'Lithium' Goes LTS: Temporal Ships, and the Deprecation Bills Come Due
Node.js 26.13.0 'Lithium' became Active LTS on October 28, with support to April 2029. Temporal by default, V8 14.6, real removals, and what upgrading a NestJS or Express service actually takes.
Read →
Note 068
The Wire · Tooling · Nov 10 · 8 min
NestJS 12: ESM Packages, Schema-First Validation, and an Upgrade You Can Mostly Script
NestJS 12 shipped August 27 with ESM-only packages, Standard Schema validation on route decorators, Vitest and oxlint defaults, and a hosted observability SDK. What breaks, what does not, and how to move a v11 app.
Read →
Sheet 3 of 4 · On the bench
Things I build for myself.
Small products shipped under my own name. Each one is a test rig for the shop and a source of notes.
Mk I · Mobile
Low Bar
A habit tracker that sets the bar low on purpose. Show up, mark the day, keep the streak honest.
Pre-launch
Mk I · Dev tools
Deslopping
Proof that an engineer read the AI-written code before approving the pull request. Comprehension, not vibes.
In progress
Mk I · SaaS
Bookleys
Booking and client memory for service professionals. The calendar that remembers who people are.
Exploring
Sheet 4 of 4 · Work
DevLazar.
One engineer, three stations.
Lazar Stanković PR DevLazar · Clients abroad
The company behind the work. Custom software, MVPs on a deadline, and backend systems that have to hold when the traffic arrives. Everything leaves the shop with drawings.
Station 01
Proof of concept, MVP, product
Built fast with AI to a working POC in days, then the MVP in weeks, then the full product. Each stage scoped to survive the launch.
Station 02
Backend architecture and scale
Pipelines, auth, APIs under high-frequency load. Monthly retainer.
Station 03
Launch Survival Audit
A fixed-price inspection before your system meets its users.
Build logs · SelectedMost of the file is under NDA · Stamped by what can be said
Log 01Sector only
Media and publishing, NDA protected
React CMS features and the Node.js and NestJS APIs behind them, owned from requirements to release.
Log 02Sector only
Logistics and warehouse management, NDA protected
A React admin interface, Next.js pages and NestJS APIs, with hosting and CI/CD set up on Hetzner and GitHub Actions.
Log 03Sector only
EdTech, NDA protected
React applications and NestJS services for multiple users and organizations, including an AI-driven learning content management system.
Detail A · The engineer
Fig. 7Lazar Stanković · Owner / Operator
An engineer who writes things down.
I have built for banks, hospitals, insurers and sensor networks. Most of it I cannot show you. All of it taught me something, and the lessons are not under NDA.
Now
→Shipping custom software with a small crew I trust.
→Reading Seneca on the morning commute.
→Learning Rust, one crate at a time.
General notes
Note 1Perfect systems do not survive contact with reality. Resilient ones do.
Note 2 · Do not scale drawing. Note 3 · All dimensions in weeks unless stated.
Weekly · Free
The Wire.
One letter a week on AI infrastructure, shipping on a deadline, and the craft of building things that last. No noise, no sponsors you did not ask for.