I'm Hasnain, a Senior Full Stack Engineer and Systems Architect. I take messy operational problems and turn them into production systems that hold under real load.
Seven years, 200+ web projects, and 10+ production-grade platforms: real-time infrastructure, multi-tenant SaaS, AI/LLM products, and commerce at six-figure monthly volume.
Teams and brands I've built for
Each of these had one problem at its centre that no amount of extra code would solve; only a different architecture would.
Business phone systems are sold as closed platforms: a tenant cannot bring their own carrier account, routing rules are configured through someone else's UI, and call data is trapped. Building an alternative means owning both the real-time telephony leg and the multi-tenant boundaries around it.
Cold outbound on a conventional ESP fails on its own terms: the provider suspends the account for the exact behavior the tool exists to perform. Sending through real mailboxes avoids that, but you inherit everything the ESP was handling, send caps, rotation, warmup, bounce processing, reply detection, and deliverability monitoring.
Resolving severe network clock drift in client-side countdowns and preventing race conditions and double-selling when thousands of users simultaneously trigger Buy Now clicks.
Production systems, commerce platforms, NGO infrastructure, and custom CMS builds, filterable by what you actually came here for.
n8n and Make.com pipelines built for real operations: lead generation, support triage, order taking, and hiring. Each one replaced a recurring manual job, not a hypothetical one.
Breadth is only useful if it's real. This is the full range I've actually shipped in, from CMS websites through to multi-tenant AI platforms and payment infrastructure.
From simple CMS websites to enterprise-level custom platforms
Every one of these came from a system that broke, or nearly did. They are how I make decisions before there is enough information to be certain.
I design the data model, the failure modes, and the boundaries before the first component. Most production incidents are architecture decisions arriving late.
WebSockets are the easy part. The hard part is deciding what is authoritative, where it lives, and how clients reconcile when they disagree with the server.
Idempotency keys, distributed locks, row-level locks, gateway failover. In payments the correct number of double-charges is zero, and getting there is design, not testing.
Normalize inputs before the model and validate outputs after it. A model in the middle of a pipeline is fine; a model as the pipeline is a liability.
If a person does it more than weekly and it has a clear trigger, it belongs in a workflow. Every automation I ship replaced a job someone was actually doing.
Security work follows a real deployment, not a hypothetical one: PHP upgrades, HSTS, TLS, WAF rules, verified by a before-and-after scan rather than a checklist.
From sole developer, to leading a 20-person production department, to running delivery across several agencies at once. Each step was a wider blast radius for the same instinct: build the system, not the feature.
Multiple agencies · own studio · direct clients · Remote, worldwide
Full-service digital agency · Karachi, Pakistan
Creative & media agency · Karachi, Pakistan
Animation & creative studio · Pakistan
Technical training institute · Karachi, Pakistan (Part-time)
Software house · Pakistan
SZABIST, Islamabad
I started writing code at ten and never really stopped. What changed over seven years was the altitude: from building the feature, to building the service, to designing the system the whole business runs through.
Today I run technical delivery across several agencies at once, alongside my own studio and direct clients: architecture, build, and the people doing the work, for teams across four continents. Before that I grew a production department from zero to twenty and shipped sixty-plus projects as the primary technical decision-maker.
The thread through all of it: I like the problems where the obvious solution doesn't work. Clock drift across thousands of clients. Double-charging on a flaky connection. Spam-foldering you can't measure. Those are the ones worth doing properly.
The hardest problems I have shipped were never solved by writing more code. They were solved by changing where state lives, or when a decision gets made.
Requirements, architecture, build, hardening, deployment, and the client conversation. I have run all six on the same project, which is why the handoffs between them do not break.
Gift Aid, local payment rails, multi-currency checkout, data residency law. Wherever a build lands, local constraints are architecture, not configuration.
Gym, study, and delivery all run on the same principle: a system you can follow on a bad day beats intensity you can only sustain on a good one.
Not a list of things I've read about. Every item here has been through a deploy, an incident, or a client deadline.
TypeScript end to end on anything new; PHP and the rest where existing systems and clients already live.
React and Next.js App Router with a headless component layer, accessible primitives, no page builders, no component-library lock-in.
Node services split by responsibility: HTTP, workers, and pollers as separate processes so a deploy never interrupts in-flight work.
Postgres as the system of record, Redis for anything hot, and hand-tuned locking where correctness beats convenience.
Models sit inside pipelines with deterministic edges, normalized input before, validated output after, and tiering so cost tracks the work.
Anything measured in minutes goes on a queue, and anything on a queue gets a progress channel back to the user.
Money code gets paranoid treatment, idempotent by construction, multi-gateway failover, and reconciliation you can audit.
Sending through real mailboxes means owning warmup, rotation, bounce handling, and the difference between a measured metric and an inferred one.
Custom themes and plugins written by hand, no page builders on anything that has to perform or be maintained.
I own the box, not just the repo, provisioning, reverse proxies, TLS, DNS, and the deploy pipeline in front of them.
Hardening work follows a real deployment and is verified by a before/after scan, not a checklist.
If a person does it more than weekly and it has a clear trigger, it belongs in a workflow.
Wired in before launch, not after the first incident, an async failure with no trace is one you will never reproduce.
The unglamorous layer that makes the rest repeatable.
Walkthroughs of real architecture decisions from client work, sanitized of anything sensitive, but with the actual reasoning left in.
No single big commitment. Every engagement is quoted against a written technical plan, and if it isn't working after the first milestone, you stop and owe nothing further.
A real product in front of real users: architecture, core build, auth and billing foundations, deployed to your own infrastructure.
The complete platform, production-hardened: real-time infrastructure, advanced RBAC, AI features where they earn their place, load-tested.
Ongoing technical ownership: architecture, code review, vendor decisions, hiring support, hands-on build where it moves fastest.
A bottleneck you keep working around, a platform that buckles under load, or a system you haven't built yet. The more specific you are, the more useful my first reply will be.
Based in Islamabad on PKT (GMT+5), working with clients worldwide. I typically reply within 24 hours. Mention it if something is urgent.
