FULLSTACK
DEVELOPER

5 years architecting, designing, and shipping end-to-end solutions for medical, government, and private organizations. From project management to production deploy.

Oren Sayag

+5YEARS OFEXPERIENCE

+20PROJECTSCOMPLETED

+10WORLDWIDECLIENTS

WEB APPS & AI

End-to-end web applications, AI tooling, and LLM integrations

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INTEGRATIONS & DEVOPS

API integrations, Docker deployments, NX monorepos, and Linux servers

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RECENTPROJECTS

Music PracticeA focused practice companion for disciplined musicians — plan sessions, record yourself, and watch real progress over time. Built it because I needed it.

React · Hono · Drizzle · PG

2025

→

Livemusic-practice.orensayag.com/ ↗

Session planner, audio recording, progress charts. Designed around the way I actually practice — and the way I wish I had when I started guitar twelve years ago.

Article QuizA web app that turns any article into a quiz with LLMs. Paste a URL, get a check on whether you actually read the thing.

shadcn · Vite · Hono · PG

2025

→

Livearticle-quiz.orensayag.com/ ↗

Tight LLM pipeline, careful prompt design, clean UX. A small product I use myself — comprehension over consumption.

Your product! Enough with me. Let's hear about your vision! :)

— · — · —

2026

FREELANCESERVICES

Web appsFrom idea to shipped — full TS stack, real auth, real database, real deploy.

TS · React · Node · PG

Lead

→

Discovery → architecture → ship → iterate. Engagements run from a 2-week MVP sprint to multi-month builds.

AI & LLM toolingPrompt pipelines, agent workflows, RAG, evals, the unglamorous plumbing.

OpenAI · Anthropic · Vercel AI

Lead

→

I take the demo and make it production-grade — proper evals, structured outputs, retries, observability.

Mobile appsReact Native / Expo for iOS & Android. Cross-platform when it makes sense.

Expo · React Native

→

From single-developer apps to features in larger codebases. EAS builds, OTA updates, push.

Bug fixes & rescueInheriting someone else's codebase. Tracing the gnarly bug. Cleaning up before launch.

Whatever you're on

→

Pre-launch panic, mystery production bugs, that thing the last contractor left half-done.

Performance & optimizationSlow pages, slow queries, slow builds. Profiling, caching, database tuning, bundle diets.

DevTools · Postgres · Lighthouse

→

Audit → quick wins → structural changes. You'll get numbers before and after.

Automations & integrationsGlue work between tools, internal scripts, scheduled jobs, webhooks.

Node · APIs · Cron

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That manual process eating an hour a day. Often a few days of work for years of saved time.

Tech consultingStack choices, architecture review, hire-or-build calls.

Calls · Reviews · Memos

By the hour

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60-min calls or async written reviews. Best when you're about to spend real money.

WORKEXPERIENCE

Tech.co.il

Fullstack Developer

Started as a junior React developer, grew into solo developer, solution architect, and dev project manager. Owned projects end-to-end — from requirements gathering and architecture design through development, deployment, and maintenance. Built integration systems for medical organizations (NestJS, Linux), control panels (Next.js), a medical test delivery system used by 10+ businesses (Next.js, Fastify, Docker, NX monorepo), a CRM with audio player (Payload CMS), and a media game system for physical rehabilitation (Next.js, NestJS, PostgreSQL). Plus more fullstack apps with Next.js + Laravel.

2021 - 2026

Tools

RECENTTHOUGHTS

How I Prevent AI Slop (Simple)

engineeringproject-management

Agentic coding is like smartphone usage - we miss the old life but we cannot go back. I found a way to prevent low quality damaging AI slop code, while regaining my architectural creativity and understanding of the codebase. It's so simple.

May 5, 2026

LET'S WORKTOGETHER

LinkedIn orensayag500@gmail.com +972 54-20-90-500