Available for freelance & contract work
Senior Full-Stack Developer
& AI Engineer
I build production-grade web applications, AI-powered systems, and scalable backends for startups and growing businesses. 5+ years shipping real products across SaaS, fintech, healthcare, and AI.
First call is a free 30-minute technical consultation — no obligation. I reply to every serious inquiry within one business day.
- Years shipping production software
- 5+Years shipping production software
- Job Success Score on Upwork
- 100%Job Success Score on Upwork
- Contracts delivered
- 13+Contracts delivered
- Hours billed
- 1,400+Hours billed
01Selected Work
Products in production, not prototypes.
Seven builds across SaaS, AI, fintech, and consumer mobile. Each one links to a short case study covering what it does and how it's built.
02Experience
Where I've done the work.
- Ship features across a multi-service SaaS platform for sober living homes — a React Native resident app, a Next.js admin web app, and AWS-hosted microservices
- Designed and built "Phases", a stage-based resident progression system: four new domain entities with interval-based history for progression analytics and audit, plus per-phase curfew, visitor-policy, and requirement configuration
- Delivered a HIPAA Safe Harbor-compliant de-identification pipeline for account cancellation, nulling and generalizing PII and sub-state geographic identifiers while preserving row structure for aggregate analytics
- Rebuilt CI/CD on GitHub Actions with OIDC keyless auth, branch-to-environment routing across three AWS accounts, per-developer deployments to isolated ECS services, and fail-closed guards against misrouted deploys
- Stood up a greenfield AWS dev environment in Terraform mirroring staging: VPC and subnets, RDS, S3, API Gateway, four ECS Fargate services, and a Lambda WebSocket authorizer — cutting dev cost with Fargate Spot and enabling deployment circuit breakers with auto-rollback
- Built an automated chore rotation algorithm with offset-based fair distribution that survives mid-cycle roster changes, scheduled via Vercel cron
- Built a resident self-service portal with an edit-request approval workflow, feature-flagging infrastructure across three repos for staged rollouts, and Stripe ACH microdeposit verification
- TypeScript
- React Native (Expo)
- Next.js
- Node.js
- Prisma
- PostgreSQL
- AWS
- Terraform
- GitHub Actions
- Stripe
Jun 2024 — Present
AshSol
Backend Engineer
Islamabad, Pakistan
- Designed and implemented scalable microservices for a fintech platform processing real-time ACH and wire transactions
- Built secure SFTP-based file processing pipelines for banking integrations, replacing manual workflows and improving efficiency by 80%
- Developed event-driven and queue-based systems for time-sensitive financial operations with fault tolerance
- Implemented KYC and compliance workflows using Spring Security
- Java
- Spring Boot
- NestJS
- TypeScript
Apr 2022 — May 2024
ZIXEL Technologies
JavaScript / TypeScript Developer
Islamabad, Pakistan
- Developed scalable backend services and APIs for high-traffic SaaS and enterprise platforms including cloud-based CAD and VR tools
- Built real-time communication systems using WebSockets
- Contributed to Alibaba Cloud infrastructure including ECS provisioning, VPC configuration, OSS for 3D asset delivery, and Nginx reverse proxy setup
- Mentored junior developers and enforced clean architecture across the team
- Vue
- JavaScript
- TypeScript
- React
- Three.js
- Node.js
Certifications
- Java Spring BootAmigoscode
- React SpecializationMeta
- Version Control with GitAtlassian
- Unsupervised Learning, Recommenders, Reinforcement LearningDeepLearning.AI · Coursera
Education
COMSATS University Islamabad
BS, Computer Science
2018 — 2022 · CGPA 3.19
Relevant coursework
- OOP
- DSA
- DBMS
- Operating Systems
- AI
- Machine Learning
03What I Do
Three layers, one engineer.
Most of my work sits where these overlap — an AI capability that needs a real product around it, and infrastructure solid enough to run it unattended.
04Stack
What I build with.
Tools I've shipped production systems on — not a list of things I've read about.
Frontend
- React
- Next.js (App Router)
- Vue.js
- Angular
- TypeScript
- Tailwind CSS
- shadcn/ui
- React Native (Expo)
Backend
- Node.js
- NestJS
- Express.js
- Java Spring Boot
- Python FastAPI
- Prisma
AI & LLM
- Claude API
- OpenAI API
- RAG pipelines
- pgvector
- LangChain
- Embeddings
- Prompt Engineering
- Retell AI
- Twilio
- ElevenLabs
- Deepgram
Databases
- PostgreSQL
- MongoDB
- MySQL
- Redis
- DynamoDB
- Firebase
- Supabase
Cloud & DevOps
- AWS Lambda
- S3
- ECS
- RDS
- API Gateway
- SES
- Transcribe
- Bedrock
- EventBridge
- Secrets Manager
- Azure App Services
- AKS
- Azure Functions
- Data Factory
- Docker
- Kubernetes
- GitHub Actions
- Terraform
- Vercel
- Railway
Integrations
- Stripe
- WebSockets
- Webhooks
- REST APIs
- GraphQL
- SFTP
- BullMQ
- RabbitMQ
05About
Who you'd be working with.
I'm a senior full-stack developer and AI engineer based in Islamabad, Pakistan with over 5 years of experience building production software. I've shipped SaaS platforms, fintech backends, AI-powered systems, and consumer mobile apps across industries including healthcare, real estate, and financial services.
I'm the founder of Aventrex Digital, a product-focused software development agency, and I freelance independently on Upwork with a 100% Job Success Score across 13+ contracts.
I work across the full stack — from database schema design to cloud deployment — and I integrate AI into real products, not demos. I use Claude Code and Cursor as primary development tools and ship faster because of it.
When I'm not building, I'm thinking about system design, real estate investment, and financial markets.
- Based in
- Islamabad, PK
- Timezone
- GMT+5 · US/EU overlap
- Founder of
- Aventrex Digital
- Currently
- Senior Platform Engineer, SobrietyHub
06How I Work
Predictable from scope to support.
No surprises on cost, timeline, or what you get at the end. This is the same process whether it's a two-week build or a six-month engagement.
Scope
We pin down the outcome, the constraints, and what's actually in v1. You get a written plan and an estimate before any code is written.
Build
Short feedback loops and working software early. You see progress every week — no black boxes, no month-long silences.
Ship
Tested, deployed, and documented on real infrastructure with CI/CD, monitoring, and handover notes your team can act on.
Support
I stay on after launch to monitor, fix, and extend. The codebase is structured so the next feature isn't a rewrite.
07FAQ
Questions I get before we start.
What kind of projects do you take on?
Production software with a real user at the end of it: SaaS platforms, AI and RAG systems, voice AI, fintech backends, and cross-platform mobile apps. I'm most useful on projects that need both the AI layer and the product engineering around it.
Do you work solo or with a team?
Both. Most engagements I handle end to end myself. For larger scopes I bring in senior developers through Aventrex Digital, my agency, and stay directly responsible for architecture and delivery.
How do you handle AI features that need to be reliable?
Retrieval before generation, structured output validation on every response, and grounding so answers trace back to source data. That's the difference between a demo and something you can put in front of customers.
What are your timezone and availability like?
I'm in Islamabad (GMT+5) and overlap comfortably with both EU and US mornings. I'm available for freelance and contract work, and I reply to every serious inquiry — usually within a day.
Can you work with an existing codebase?
Yes. A good share of my work is joining a live system: fixing what's fragile, extending what works, and leaving the architecture better documented than I found it.
How do engagements usually start?
A short call to understand the problem, then a written scope with milestones and a fixed estimate. You know the plan and the cost before the first commit.
What does the first call cost?
Nothing. The first conversation is a free 30-minute technical consultation — you describe the problem, I tell you how I'd approach it and roughly what it takes. If I'm not the right person for it, I'll say so and point you somewhere better. There's no obligation and no pitch deck.
How do you price work?
Fixed-price per milestone for scoped work, hourly for open-ended or ongoing engagements. Either way you get the estimate in writing before anything starts, and I flag scope changes when they happen rather than at invoice time.
Can an AI assistant contact you on my behalf?
Yes. There's a documented API at /for-ai-agents that ChatGPT, Claude, Cursor, or any MCP-connected agent can call to pass your details over directly, so you don't have to go find a form. It only works with your explicit consent — the endpoint rejects submissions that don't carry it — and you get the same free 30-minute consultation and same one-business-day reply.
08Contact
Tell me what you're building.
Send over the problem and any constraints you already know about. The first step is a free 30-minute technical consultation — you describe it, I tell you how I'd approach it and what it takes. No obligation, no pitch deck, and if I'm not the right person I'll say so.
- Reply within 1 business day
- Written scope before any code
- No newsletter, ever
Islamabad, Pakistan · GMT+5 · overlaps EU and US mornings
Working with an AI assistant? It can send this inquiry for you — point it at the agent API.