Sheryar Ahmed
Full-Stack Engineer
"I ship fast without breaking things."
Full-stack engineer with 4+ years turning complex requirements into production systems that scale.
- ✓Built and operate Pathment, a live B2B SaaS with 3,000+ users, end to end from schema to production
- ✓Real-time systems: SSE + Redis Pub/Sub and Socket.io live streaming
- ✓AI/LLM in production: multi-provider pipelines (Groq/OpenAI) with RAG
- ✓500+ DSA problems solved, with a strong algorithmic foundation
Core Technologies
What I've actually shipped
Code Optimizations
Real improvements from production systems
N+1 query problem causing 2.5s load time
// ❌ N+1 Query Problem
const users = await User.findAll()
for (const user of users) {
user.posts = await Post.findAll({
where: { userId: user.id }
})
}
// Result: 2500ms for 100 users// ✅ Eager Loading
const users = await User.findAll({
include: [{
model: Post,
as: 'posts'
}]
})
// Result: 180ms for 100 usersExperience
Full Stack Engineer
TechWinture (Staff Augmentation) • Oct 2025 - Present • Remote
- • Raumdeuter (fan engagement): Designed a real-time architecture with SSE + Redis Pub/Sub across instances; cut dashboard load from 6–8s to sub-second; built a gamification engine and refactored a monolith into layered MVC with API versioning
- • PACK (Azure SaaS): Led migration of a FastAPI service from an improperly-implemented Hexagonal architecture to a Modular structure (cut change-surface from ~7 files to 1–2); integrated Microsoft Graph API + Azure Entra ID
Founding Engineer
Pathment • 2025 - Present • Remote
- • Designed, built, deployed, and operate a B2B mentorship SaaS with 3,000+ users. 35+ data models, owned end to end from schema to CI/CD
- • Built a scoped authorization system (org, program, clan, self) with a permission catalog, role delegation, and full audit logging
- • Engineered an AI roadmap pipeline with multi-provider fallback (Groq, then OpenAI, then a rule-based fallback) for reliable structured output
- • Postgres-backed email queue (retries, dead-letter, idempotency) + zero-downtime release runbook with Docker, Caddy, and GitHub Actions CI/CD
Full Stack Engineer
Appsologix • Jun 2024 - Sep 2025 • 1yr 4mo
- • HealthSIA: 7-role RBAC healthcare platform covering the full patient lifecycle, with real-time doctor–patient chat and a multi-phase workflow engine
- • Peepskill: Social platform for 2,000+ users with feed aggregation, nested comments, and RBAC; redesigned feed pagination and added MySQL indexing
- • Royal Vision: Tourism booking platform with 25+ admin modules, multi-currency payments (CCAvenue), and an age-based pricing engine
- • Led CI/CD with Docker + GCP deployments across all projects
Full Stack Engineer
Independent / Contract • Jan 2024 - Jun 2024 • Remote
- • Pixy Live: Core engineer on a TikTok-Live-style streaming platform with Socket.io live rooms, a virtual gift economy with race-condition-safe wallet logic, and Agora, S3, and Stripe integration
- • Doorcut (France): On-demand barber marketplace with real-time chat, Stripe payouts, JWT-OTP auth, and a reusable MongoDB pagination plugin
Full Stack Engineer
Oqvest • Jun 2023 - Oct 2023 • United States • Remote
- • Built a Node.js + MySQL backend for a US mortgage loan-processing platform, to US-industry compliance
- • Integrated Google Drive API for secure documents; JWT auth + RBAC for loan officers, applicants, and admins
- • Deployed on AWS with Docker, Nginx, and Jenkins / GitHub Actions CI/CD
- • Collaborated in US business hours with US product, compliance, and operations teams
Frontend Engineer
Z2A Tech • Sep 2021 - Sep 2022 • 1yr 1mo • Lahore
- • Self-taught JS and React; built a schema-less JSON to MITRE ATT&CK matrix UI with advanced filtering for a cloud-security SaaS (TrustOnCloud)
- • Implemented tier-based access control with AWS Cognito + S3 bucket policies
- • Built a UAE real-estate marketplace (AWS Amplify, AppSync, DynamoDB, OpenSearch)
- • Built an award-winning GatsbyJS company site with the engineering team
Technical Approach
Architecture
Design systems for maintainability and scale. Favor composition over inheritance. Keep services small and focused. Use the right tool for the job.
Delivery
Ship early, iterate fast. Comprehensive testing. Gradual rollouts. Monitor everything. Learn from production.
Collaboration
Clear documentation. Code reviews that teach. Cross-functional alignment. Share context widely. Default to transparency.
Impact
Understand business goals. Measure what matters. Optimize for user value. Balance speed and quality. Own outcomes, not output.
Skills & Technologies
A comprehensive overview of my technical expertise across the full stack
Things I've shipped
A few production systems I designed, built, and ran end to end. Not demos.
.jpeg?height=400&width=800)
HealthSIA
A patient–therapist–surgeon communication and perioperative care platform with role-based dashboards and real-time chat.
Platform adopted across multiple clinics, improving patient engagement and care coordination
Reduced API response time by ~40%
Streamlined clinical workflows and operational efficiency
.png?height=400&width=800)
Peepskill
A sports-focused social networking platform with role-based profiles, feeds, connections, and content moderation, serving 2,000+ early users.
Successful MVP adoption by 2,000+ early users
Reduced DB query load by ~35% through optimization
Enabled admins to moderate 100% of reported posts and users
Engineering Journal
Deep dives on system design, performance optimization, and lessons from building production systems
Case Study: Optimizing Database Queries for 40% Performance Gain
How we reduced API response times by 40% through systematic database optimization in a production healthcare platform serving 5,000+ users.
Building Production-Ready Real-Time Chat: Architecture & Trade-offs
Deep dive into architectural decisions, trade-offs, and lessons learned while building a scalable real-time chat system for healthcare.
Scaling Real-time Features: WebSockets vs Server-Sent Events
Real-time features have become essential for modern web applications. Whether it's live chat, notifications, collaborative editing, or live updates, users expect instant feedback.
Let's Work Together
I'm always interested in new opportunities and exciting projects. Let's discuss how we can build something amazing together.
Get in touch
I'm currently open to new opportunities and interesting projects. Whether you're looking for a full-time engineer, consultant, or just want to chat about technology, I'd love to hear from you.
Response Time
I typically respond to messages within 24 hours. For urgent matters, feel free to reach out via LinkedIn.