Ilie Beleniuc

Platform US freight brokers use to vet and monitor motor carriers. pnpm monorepo: Next.js 15 portal (React 19, tRPC 11), NestJS API, AWS SQS consumers and cron jobs, shared core library on Prisma and MySQL.

• Ship features end to end across the monorepo: Prisma schema and migrations, NestJS and tRPC endpoints, SQS consumers and React UI, released as coordinated changes across several repositories.
• Own key parts of broker–carrier onboarding: invitations, automated re-invite and reminder cadences, and approval workflows for changes to carrier data.
• Moved the platform's transactional email onto event-driven Customer.io campaigns and built scheduled reporting jobs on SQS cron consumers.
• Built audit and admin tooling, including a full membership history recorded on every write path and exposed through the API.
• Rebuilt the carrier investigation report as a server-generated PDF and reworked portal settings and navigation for broker accounts.

• Fixed bugs and built small features in a React and TypeScript web application, working through code review in an Agile team.
• Wrote unit tests and REST endpoints, and took part in sprint planning, stand-ups and demos.

Backend development on a telecom billing platform.

Digital twin of Istanbul Airport airspace from open ADS-B data: a browser replay, two forecasts and approach anomaly detection, with a technical write-up of what worked and what did not.

• Rust CLI streams the 4 GB/day public ADS-B archive without writing it to disk and compacts each day to Parquet with METAR weather; a rules engine turns positions into arrivals, departures, runways, go-arounds and holds (1,282 movements/day against the airport authority's published 1,449).
• LightGBM landing-time forecast at 40 nm: 1.39 min mean error vs 1.90 for the best baseline, exported to ONNX and served from Rust with parity tests. The hourly-arrivals model did not beat a 7-day baseline, and the report says so.
• Unsupervised approach anomaly detection (nearest-neighbour on resampled paths, plain Rust) compared against three detectors: an isolation forest and the forecast's error ranked holds and go-arounds better, which the write-up reports with a post-test correction; it surfaced rare north-east entries and a go-around the rules missed.

Day-ahead hourly electricity load forecast for Moldova, published every morning in English, Romanian and Russian and scored against the grid operator's own plan.

• LightGBM quantile regression with a rolling conformal correction; over a one-year test, 8.6% MAPE vs 18.7% for the operator's plan, with the 90% range covering 88.4% of hours.
• Estimated ≈668 MW of rooftop solar the operator cannot meter; the method matches the national energy agency's 2024 total within 1%. Seven-chapter data story on Moldova's grid, 2021–2026.
• Runs unattended: systemd timer ingests, retrains monthly, forecasts, scores and commits; the page redeploys on GitHub Pages.

The 2026-27 Champions League simulated 10,000 times after every matchday, with a "what if" mode that re-runs every season in the browser in about a second.

• Hierarchical Dixon–Coles model fitted on 32,000 matches from 18 leagues and UEFA competitions; strength uncertainty carried into every simulated season.
• TypeScript engine with UEFA's full tiebreaker rules reproduces the official 2024-25 and 2025-26 tables exactly; the same code runs in Node and in a Web Worker.
• Out-of-sample ranked probability score 0.197 vs 0.217 for Elo on 558 Champions League matches. A daily GitHub Action commits each prediction before kick-off.

• Turns a phone into a remote for any web page through a long-poll relay that survives throttled background tabs; runs on Node or a Cloudflare Durable Object, with end-to-end tests in CI.

• Renders web pages to video frame by frame with Playwright and ffmpeg, identical every time: pages expose seek(t) or run unchanged on a virtual clock (timers, requestAnimationFrame, Date, Math.random).

• Scroll story of one night in Chișinău: 6,909 OpenStreetMap roads drawn as a long exposure in WebGL2, up to 6,000 cars driving the real road graph, and an isometric SVG panel block whose 144 flats switch on and off with the hour.
• Astro and GSAP, one scroll-driven clock for every layer; 60 fps on integrated graphics.

Software for a youth volunteer organisation in Chișinău.

• Next.js 15, Drizzle and Turso: volunteer passports, QR-verifiable certificates, hours tracking, event check-in and an impact dashboard.
• Public site in React 19 and Vite, Romanian and Russian, with registration and donations; payment endpoint on a hardened Debian VPS behind Caddy.