I build SaaS products that make it to production — not just to demo day.
I’m Hamza Anwar, a full-stack developer with 5+ years of experience shipping real-time AI platforms, marketplace integrations, and MVPs for founders worldwide — from first commit to paying customers.
5+
years shipping
5.0★
rated on Upwork
<2s
real-time latency shipped
2
SaaS platforms in production
Selected work
Case studies, not screenshots.
Two production platforms I engineered end-to-end — the problems, the hard parts, and what shipped.
Unfoldr Live
Real-time classroom translation platform
Multilingual classrooms lose students the moment the teacher starts talking. I built the entire live-translation product line so teachers teach naturally in English while every student follows along in their own language — live.
- Speech → translated text in under 2 seconds: WebSocket audio through streaming ASR, fanned out concurrently to every language in the room
- Three client apps — teacher console, anonymous student app, and a projector view for smartboards
- Two-way communication: students reply by text or voice in their language, teachers read it in English
- AI class summaries at three reading levels, plus classroom-grade reliability: reconnection, heartbeats, and mid-session replay
“Today we’re going to learn about photosynthesis.”
Hoy vamos a aprender sobre la fotosíntesis.
اليوم سوف نتعلم عن عملية التمثيل الضوئي.
آج ہم فوٹو سنتھیسز کے بارے میں سیکھیں گے۔
Miles Davis — Kind of Blue
CF-04182
Fleetwood Mac — Rumours
CF-04183
Nas — Illmatic
CF-04184
Portishead — Dummy
CF-04185
CrateFlow
Discogs → eBay inventory manager for vinyl sellers
Vinyl sellers were listing records by hand on two marketplaces and double-selling the same copy. CrateFlow turns a Discogs inventory into eBay listings in minutes and keeps both sides in sync automatically.
- Resumable bulk imports that survive interruptions — 10,000+ records paged through rate-limited APIs
- Async job pipeline on Bull/Redis: 25 concurrent workers, retries with backoff, live progress, completion emails
- Two-way smart sync: sold on one marketplace → ended or delisted on the other, plus scheduled price reconciliation
- Stripe billing across four tiers, with inventory limits enforced atomically in Postgres to stop race conditions
More work
AI SEO Writing Tool
AI-powered SEO tool that analyzes and optimizes external websites with actionable content recommendations.
Next.js · MobX · Ant Design
Office Management System
Employee records, payroll, and attendance management designed for efficient day-to-day office operations.
React · Ant Design · MobX
What I do
Three ways I help founders ship.
MVP — idea to launch
Architecture, backend, frontend, deployment. I take your product from a rough idea to something real your first users can pay for — and I've done it across six-milestone roadmaps, not just demos.
AI product engineering
Streaming LLM features, real-time speech and translation pipelines, review-and-publish workflows, and the unglamorous parts — caching, rate limits, and cost control — that make AI features shippable.
Rescue, extend & scale
Already have a product? I join existing codebases to add features, fix what's slow or broken, and re-architect what won't scale — like migrating a 3,800-line monolith to NestJS with zero downtime.
Toolbox
The stack behind the work.
Frontend
Backend
Data & Infra
AI & Integrations
Client reviews
People I’ve shipped with.
“Hamza took my idea and helped turn it into a working MVP, communicating clearly throughout and making adjustments based on feedback. He was responsive, reliable, and willing to think through the best approach instead of just completing tasks. We just finalized the next phase of the project — I'm rehiring him for it.”
Rojer Jack
Founder, EdTech — repeat client · Verified on Upwork
“He single-handedly built the backend, implemented complex AI workflows, and even advised on product strategy — all with speed and precision. If you're looking for a developer who doesn't just code but thinks like a co-founder, Hamza is for you.”
Conor
Founder, AI Startup · Verified on Upwork
“A rare find — a developer who not only writes clean, functional code, but also brings integrity, patience, and a genuine commitment to your vision. He helped take a complicated education app from a raw idea to a live, working product.”
Rojer Jack
Founder, EdTech · Verified on Upwork
“The experience was nothing short of exceptional. Every request we made was delivered with precision and speed. It felt like working with a well-oiled machine. His creativity, reliability, and technical ability make him an invaluable asset.”
Mahdi
Client, Upwork · Verified on Upwork
“Outstanding work! Great communication, always quick to respond and kept me updated at every stage. The work itself was top-notch, delivered on time and exceeded expectations. I'd happily work with Hamza again.”
Alex
Client, Upwork · Verified on Upwork
“Highly skilled, adaptable, and committed to delivering results, even when project requirements shift. He consistently went above and beyond the original scope, implementing extra features and solving complex technical challenges.”
Rojer Jack
Founder, EdTech · Verified on Upwork
“Hamza took my idea and helped turn it into a working MVP, communicating clearly throughout and making adjustments based on feedback. He was responsive, reliable, and willing to think through the best approach instead of just completing tasks. We just finalized the next phase of the project — I'm rehiring him for it.”
Rojer Jack
Founder, EdTech — repeat client · Verified on Upwork
“He single-handedly built the backend, implemented complex AI workflows, and even advised on product strategy — all with speed and precision. If you're looking for a developer who doesn't just code but thinks like a co-founder, Hamza is for you.”
Conor
Founder, AI Startup · Verified on Upwork
“A rare find — a developer who not only writes clean, functional code, but also brings integrity, patience, and a genuine commitment to your vision. He helped take a complicated education app from a raw idea to a live, working product.”
Rojer Jack
Founder, EdTech · Verified on Upwork
“The experience was nothing short of exceptional. Every request we made was delivered with precision and speed. It felt like working with a well-oiled machine. His creativity, reliability, and technical ability make him an invaluable asset.”
Mahdi
Client, Upwork · Verified on Upwork
“Outstanding work! Great communication, always quick to respond and kept me updated at every stage. The work itself was top-notch, delivered on time and exceeded expectations. I'd happily work with Hamza again.”
Alex
Client, Upwork · Verified on Upwork
“Highly skilled, adaptable, and committed to delivering results, even when project requirements shift. He consistently went above and beyond the original scope, implementing extra features and solving complex technical challenges.”
Rojer Jack
Founder, EdTech · Verified on Upwork
About me
Your product, treated like my own.
Hey, I’m Hamza. For the last 5+ years I’ve helped startups take ideas from a blank repo to production — architecting the backend, building the frontend, wiring up AI and payments, and staying through the unglamorous parts: migrations, rate limits, edge cases, and 2 a.m. bug hunts.
Clients keep me around because I communicate clearly, deliver on time, and think like a co-founder — flagging product risks early instead of just closing tickets.
Let’s talk
Have a product that needs to ship?
Tell me what you’re building. I usually reply within a few hours.