Hi, I'm
Suleman Altaf
Software Architect · .NET · AI · Enterprise Systems
15+ years architecting production platforms for grocery, retail, luxury, and healthcare. 60+ projects shipped, 4,590+ hours billed, from payment engines to multi-agent AI systems.
Platforms & products I've built on
About Me
I'm a software architect with 15+ years designing and shipping large-scale, production-grade systems. My work powers multi-retailer e-commerce platforms, payment engines, and AI products used by major brands across North America and Europe (grocery, luxury fashion, healthcare, and enterprise ticketing).
Deep expertise in AI/LLM engineering (LangGraph, RAG, OpenAI agents), .NET and Node.js/TypeScript ecosystems, with event-driven architectures using Kafka, RabbitMQ, and AWS. 4,590+ hours billed on Upwork as Top Rated with 100% Job Success.
AI & LLM
LangGraph, RAG, OpenAI, Agents
.NET & Backend
Clean Arch, CQRS, Microservices
Full Stack
React, Next.js, NestJS, Vue
60+ Projects
Enterprise, scalable, secure
What I Do
End-to-end engineering for enterprise platforms, startups, and everything in between
AI & LLM Engineering
LangGraph multi-agent workflows, RAG pipelines with vector search, OpenAI/Claude/Gemini integration, AI-powered automation, and production chatbots. 10+ shipped AI agent projects.
.NET Backend & Architecture
Clean Architecture, CQRS with Mediatr, microservices, event-driven systems with RabbitMQ/Kafka, payment engines, ETL pipelines, and enterprise API platforms.
Full-Stack Web (MERN/MENN)
React, Next.js, Angular, Vue.js frontends with Node.js/NestJS backends. Multi-tenant SaaS, admin dashboards, e-commerce storefronts, and real-time platforms.
ETL & Data Pipelines
Distributed feed processors, S3-triggered pipelines, Kafka streaming to Redshift/Elasticsearch, high-volume retail data ingestion, and analytics reporting.
Payment Systems
Clean Architecture payment engines with multi-processor support (Stripe, Moneris, First Data). PCI-aware flows, idempotent handlers, and feature-flagged behavior.
Cloud & DevOps
AWS (S3, Lambda, CDK, EC2, Redshift), Azure (Functions, SQL, Redis), Terraform/Terragrunt IaC, Docker, Kubernetes, CI/CD pipelines.
Projects
67+ production projects shipped across multiple platforms
Wynshop - Enterprise Multi-Retailer E-Commerce Platform
Production-grade enterprise e-commerce platform serving major grocery retailers (Meijer, Brookshires, Lunds & Byerlys, Foodland, Musgrave) across North America and Europe. 77 repositories, 30+ core microservices, 4 API gateways, 5 payment providers, 129 shared NuGet packages, orchestrated via Kubernetes.
Distributed Microservices (.NET + Kubernetes + GCP)
Multi-Agent Research System - Autonomous Web Researcher
Enterprise-grade AI research assistant that orchestrates 4 specialized agents (Planner, Researcher, Analyst, Writer) to autonomously conduct web research, synthesize findings, and generate comprehensive markdown reports with real-time WebSocket streaming.
AI Platform (FastAPI + Next.js + LangGraph)
Payment Services - Clean Architecture Payments Platform
A standalone .NET 5 payment engine structured via Clean Architecture, backed by DynamoDB, Redis, LaunchDarkly, and third-party processors (First Data, Moneris, Amaryllis), with REST API, NuGet client, and AWS Lambda migration tools.
Backend (.NET + AWS)
CDL Talent Platform - Applicant Tracking System
A TypeScript-first hiring suite connecting commercial drivers with fleet employers through a multi-tenant ATS portal, driver-facing mobile app, and shared backend services in a single monorepo.
Web (Next.js + React Native + AWS CDK)
ExtraMiles - Digital Commerce & Loyalty Platform
A global digital commerce and loyalty platform enabling shoppers to discover, configure, and purchase products while operations teams curate catalogs, pricing, and fulfillment in real time, with omnichannel experiences and embedded loyalty rewards.
Web (React + Next.js + NestJS)
GrocerKey - Consumer Shopping Experience
GrocerKey's shopper-facing web application combining a React/TypeScript SPA with a Node.js/Express server host, delivering the full customer journey: browsing, cart, checkout, loyalty, promotions, SSO, analytics, and retailer-specific theming.
Web (React + Node/Express)
HouseServicesPlatform - Direct-to-API Booking Experience
A standalone Next.js 15.5 booking form that plugs directly into HouseServicesPlatform's production API, giving cleaning partners a branded, responsive flow for authentication, service discovery, pricing, and lead capture without middleware.
Web (Next.js 15)
ExtraMiles - Loyalty Platform Core Services
The backbone of ExtraMiles' loyalty ecosystem, orchestrating membership, partner catalogs, and reward operations across distributed NestJS microservices with real-time integrations for customer apps, back-office tools, and external partners.
Backend (NestJS Microservices)
GrocerKey - Manager App Operations Console
GrocerKey's web-based management console for HQ and store teams, surfacing live operations, fulfillment, merchandising, marketing, and configuration tools via a React SPA with Express server host.
Web (React + Node/Express)
Like what you see?
Let's Work TogetherTech Stack
Technologies and tools I work with daily
AI & LLM
OpenAI 
LangChain 
Gemini Languages
C# 
TypeScript 
JavaScript 
Python 
SQL Backend
.NET 
Node.js 
NestJS 
Express 
Kafka 
RabbitMQ 
GraphQL Frontend
React 
Next.js 
Angular 
Vue.js 
Tailwind Databases
SQL Server 
PostgreSQL 
MongoDB 
Redis 
DynamoDB 
Elasticsearch Cloud & DevOps
AWS 
Azure 
Docker 
Kubernetes 
Terraform Tools
Git 
VS Code 
Visual Studio 
Postman 
Rider How I Work
Transparent engagement with daily updates and production-grade delivery
Problem Discovery
Day 1Through Upwork Messages, I dig into the real problem. What's the architecture? What breaks under load? What's been tried before? I work with clients who have serious technical challenges, not hobby builds. This scoping step determines if we're the right fit before any contract.
Architecture First
1-2 daysI design from the ground up. Clean Architecture, CQRS where it matters, proper data flows, and deployment strategy. I'll flag decisions that could go wrong early, before they become expensive production issues.
Build & Ship Daily
OngoingEvery task gets done properly. You get updates as things happen, not at the end of a sprint. If something needs your input, you'll see it immediately. I've shipped 50+ projects. I know what 'done' looks like.
Production-Grade QA
ContinuousUnit tests, integration tests, CI gates, structured logging, and performance profiling. I don't ship 'good enough'. I ship production-ready with rollback safety.
Technical Partnership
Long-termI guide you on architecture decisions, flag bad patterns before they ship, and push back when something doesn't make sense. Wrong tech stack? I'll tell you before it costs you months.
Beyond Code
Engineering leadership and delivery practices
Technical Leadership
Leading and mentoring backend and full-stack teams. Architecture decisions, code reviews, and knowledge sharing.
Stakeholder Communication
Translating business requirements into technical solutions. Clear status updates and stakeholder-friendly documentation.
Legacy Modernization
Migrating WebForms/monoliths to .NET Core, React, and NestJS. Risk management, phased rollouts, and zero-downtime transitions.
Agile Delivery
Scrum collaboration, roadmap ownership, sprint planning, and iterative delivery with clear milestones and daily updates.
Production Support
On-call troubleshooting, incident follow-up, structured logging, and data-driven hardening of production systems.
Client Reviews
100% Job Success on Upwork with 4,590+ hours billed
"If I could give Suleman 6 stars, I would. Our organization is absolutely blessed to have found him. Despite the great time difference between us, he always makes himself available."
C# Developer - Long-term Engagement
Upwork review"Suleman has been great to work with. He is skilled in many areas and makes a very big impact on the team. He lead a team of developers."
C# Backend Developer - Remote
Upwork review"Suleman is one of the best consultants we have worked with. He completed the job successfully. His communication level and quality was absolutely superb."
Azure Web App
Upwork review"Suleman is a very skilled developer who dedicated himself to providing high-quality output for our team. He did a great job with our C# and .NET requirements."
Microservices System - ASP.NET Core
Upwork review"Highly recommend Suleman. Do not hesitate to hire him if you are reading this. We are definitely lucky we found him."
WinRest Upgrades
Upwork review"Suleman is a top developer. Excellent technical skills and a good communicator. Will be working with him again."
VB.NET Ongoing Development Support
Upwork review"Suleman is a fantastic all-star full stack software developer. Would definitely hire again!"
.NET Core Web Development
Upwork review"Suleman was a great collaborator, taking on challenging work and delivering results. He was dedicated to resolving issues and persisted until finding solutions."
ASP.NET MVC Web API and Web Portal
Upwork review"Great work as always Suleman. If you are reading this, do not hesitate to hire Suleman for your project. He always delivers excellent results."
WinRest / TablePay Integration
Upwork reviewHow We Can Work Together
Three engagement models, all fixed or capped pricing. No hourly surprises, no open-ended retainers.
Architecture Review
For teams stuck on a technical decision
1 week
- Codebase & infra audit
- Written architecture report
- 90-min live walkthrough
- Prioritized action plan
Fractional Architect
Most popular for growing startups
Minimum 2 months
- ~20 hrs/week senior capacity
- System design & code review
- Hands-on implementation on critical paths
- Team mentoring & unblocking
- Daily progress updates
Build & Ship
End-to-end delivery of a defined scope
4-12 weeks
- Discovery & architecture doc
- Full implementation
- CI/CD & deployment setup
- Handover & documentation
- 30 days post-launch support
Experience
15+ years of career progression from software engineer to technical leader and agency founder
Senior Software Engineer
Jul 2025 - PresentInstacart / Wynshop
Enterprise multi-retailer e-commerce platform serving Meijer, Brookshires, Lunds & Byerlys, and more. Working across .NET 10 services, EventStore gRPC migration, search (ElasticSearch/OpenSearch), payments, and Kubernetes infrastructure.
Founder / Lead Developer
2017 - PresentAtrule Technologies (Self-employed)
Full-stack freelance development and AI engineering. Upwork Top Rated with 100% Job Success. Building LangGraph AI agents, enterprise platforms, payment engines, and e-commerce systems for international clients.
Senior Full-Stack Developer
2019 - 2024GrocerKey / Point Pickup Technologies
White-label grocery e-commerce platform for US retailers (later acquired by Wynshop/Instacart). Built consumer web apps, operations consoles, payment services, ETL pipelines, master product catalogs, and Kafka event streaming handling millions of transactions.
Senior Software Engineer
2014 - 2017Nextbridge Pvt Ltd
Enterprise .NET development including Mercedes-Benz POS (China dealerships), OrderLogix order management, Doreh.com social network (1M+ users), and AmbassadHer influencer platform (500K+ users).
Software Engineer
2013 - 2014Netsol Technologies Ltd
Enterprise software development at one of Pakistan's leading IT companies.
Software Engineer
2012 - 2013Kirana Software Solutions
.NET web development, desktop applications, and early career projects including Urdu Search Engine (Team Lead) and Patient Management System.
Certifications
IELTS - Academic
Score: 7 / 9 bands
Let's Work Together
All engagements run through my Upwork profile. Send a message with a short paragraph about the problem you're solving, and I'll reply within 24 hours on weekdays, usually with a written architecture take even if we're not the right fit.