Usama Amjid is a software engineer who specializes in backend and distributed systems. He builds the systems behind fintech apps, marketplaces, and AI products — APIs, payments, real-time features, and background jobs — and works full-stack when a product needs it, shipping Next.js websites, mobile apps, and AI agents.
He has built a multi-country digital wallet, an API-first payments product called Payment Way, a peer-to-peer car-rental marketplace (backend and website), a cybersecurity analytics backend, a product-review platform, loyalty platforms, and agentic AI systems built with LangGraph. His core tools are Node.js, TypeScript, and Deno, with PostgreSQL, MongoDB, Redis, Elasticsearch, BullMQ, AWS, and Next.js.
Usama Amjid has been building production software since October 2023 and is open to strong engineering roles and to building products with clients. People also search for him as "Usama", "Usama Amjid software engineer", and "Usama backend".
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selected work
A few of the systems I've built and shipped.
Systems I've built and shipped.
Security / Open sourceown product
shorproof
A post-quantum readiness scanner for JavaScript and TypeScript, published on npm. It finds the cryptography that Shor's algorithm breaks — RSA, ECDSA, JWT/JWKS, PEM/X.509 — and points at the NIST replacements (ML-KEM, ML-DSA).
Built and maintained solo. Binding-aware static analysis so findings survive review by a cryptographer instead of drowning teams in false positives; SARIF 2.1.0 output for GitHub code scanning and a CycloneDX 1.6 cryptographic BOM; two runtime dependencies, CI-gated, unit-tested.
A digital wallet and neobank used across several countries — accounts, transfers, cash-in/out, cards, and KYC, plus a business side for merchants.
Core backend engineer. Built the authentication platform, a login security layer, the notification service, and a campaign engine; connected regional payment providers. On the business side I built Payment Way end to end — an API-first way for outside businesses to plug in (backend, merchant dashboard, and developer docs).
Node.jsTypeScriptMongoDBRedisBullMQAWSNext.js
Marketplaceown product
Car-Rental Marketplace
A peer-to-peer car-rental marketplace — hosts list vehicles, guests book them, with live chat and real-time booking updates.
Built entirely on my own — backend and website. Raw-SQL PostgreSQL data layer, real-time chat/presence/booking status, and background jobs. My clearest proof of full-stack ownership.
I'm Usama, a software engineer who works mostly on the backend — the part of an app people never see but always feel: the APIs, payments, real-time updates, and background jobs that have to stay correct and fast, even when something breaks.
The backend is my depth, but I build the whole thing when a product needs it. I've shipped Next.js websites, mobile apps, and AI agents that actually do work instead of just answering questions. For the last three years I've built fintech systems, marketplaces, and security tooling — most of it running across several countries.
I care about getting the hard parts right: money that always adds up, systems that recover on their own, and code the next person can actually read. I've also trained and mentored two developers. I'm open to strong engineering roles and to building products with people who want it done properly.
how I work
01
I get the hard parts right
Money that reconciles, jobs that retry themselves, and clear error paths — not happy-path code.
02
I build for things going wrong
Retries, fallbacks, and no duplicate charges when a request repeats. Systems should recover on their own.
03
I write for the next engineer
Readable code, real documentation, and standards a team can follow. I led our move to TypeScript.
04
I build end to end
Backend, the website, and the documentation a client needs to actually use it.
05
I use AI well
As a builder (real AI agents) and in how I work — shipping faster with prompt engineering.
Backend engineer on a digital wallet used across several countries.
Oct 2025 — Present
Remote
Built the app's login and account system from the ground up — one-time-password sign-in, multiple devices per user, and the checks that keep bots and fake accounts out.
Built Payment Way, a product that lets outside businesses plug into the wallet through a clean API — I built the backend, the dashboard they use, and the developer documentation that explains it.
Built a security layer for login that spots and blocks automated abuse and account-guessing attacks, with rules the team can adjust live without shipping new code.
Built and led the notification service behind every email, SMS, push, and WhatsApp message — with automatic retries and fallbacks so a message still goes out when one provider fails.
Built the campaign engine that sends large batches of messages with start/pause/stop controls and daily sending limits.
Connected the platform to regional payment providers so money moves reliably even under load or repeated requests.
Helped move the codebase to TypeScript to make it safer and easier for the whole team to work in.
Backend engineer building products across cybersecurity, fintech, loyalty, and AI.
Oct 2023 — Oct 2025
Pakistan
Built the backend for a cybersecurity product that pulls in alerts from several security tools and turns them into risk reports teams can act on (multi-tenant, multi-language).
Built an AI agent (LangGraph) that plans, writes, and schedules content on its own — an autonomous agent with a tool registry and vector search.
Built the backend for a product-review platform — the products, brands, reviews, and the search and ranking behind the feed.
Built a loyalty-and-rewards platform that serves many businesses at once, each with their own setup, points, and rewards.
Built an identity-verification and wallet service that checks IDs and selfies and moves money safely (built on Deno).
A post-quantum readiness scanner for JavaScript and TypeScript, published on npm. It finds the cryptography that Shor's algorithm breaks — RSA, ECDSA, JWT/JWKS, PEM/X.509 — and points at the NIST replacements (ML-KEM, ML-DSA).
Built and maintained solo. Binding-aware static analysis so findings survive review by a cryptographer instead of drowning teams in false positives; SARIF 2.1.0 output for GitHub code scanning and a CycloneDX 1.6 cryptographic BOM; two runtime dependencies, CI-gated, unit-tested.
A peer-to-peer car-rental marketplace — hosts list vehicles, guests book them, with live chat and real-time booking updates.
Built entirely on my own — backend and website. Raw-SQL PostgreSQL data layer, real-time chat/presence/booking status, and background jobs. My clearest proof of full-stack ownership.
