Backend Systems & ML Infrastructure

Architecting High-Performance Distributed Systems

Hi! I'm Abdul Wahab Ahmed Khan, a Software Engineer specialized in scalable backends and Scientific ML.

About Me

Architecting Future-Proof Systems

I’m Abdul Wahab Ahmed Khan, a Software Engineer dedicated to building high-performance backend systems and robust machine learning infrastructure. I specialize in distributed architectures, optimizing data-intensive pipelines, and fine-tuning large language models to solve complex real-world challenges.

+1Year of Experience

+10Systems & ML Projects

1K+LeetCode Problems

Professional Experience

Full Stack Developer

QF Network - Karachi, Pakistan

Mar 2025 – Present

• Optimized p99 API latency by 40% by refactoring Prisma schema and implementing composite B-Tree indexing in PostgreSQL.

• Developed a semantic search engine using pgvector (HNSW indexing) for high-dimensional retrieval across 10,000+ SKU catalogs.

• Architected an LLM pipeline in Next.js, reducing merchant onboarding time by 95% (hours to 5 mins) via automated context and rate-limit management.

• Designed a distributed worker system using BullMQ and Redis, eliminating thread-blocking operations for asynchronous reward and webhook delivery.

Applied Machine Learning

Stanford RNA 3D Folding

Rank: 55/2,226 (Top 2.5%)Scientific ML

Engineered Transformer/CNN models with custom spatial embeddings; optimized GPU data pipelines for memory-constrained biological datasets.

Thermophysical Property Prediction

Rank: 62/1,176 (Top 5%)Chemical Informatics

Developed regression models using SMILES-derived graph descriptors to predict molecular melting points and improve convergence stability.

NVIDIA Nemotron Reasoning Challenge

Rank: 69/432 (Top 16%)LLM Fine-Tuning

Performed supervised fine-tuning (SFT) on foundational LLMs using reasoning datasets, improving multi-step logical consistency.

Competitive Programming

AtCoder

Cyan (1200), Rank 67th Global

Reached Cyan in a single debut match (Top 1% globally) in ABC 453.

Codeforces

Specialist (Max 1477)

Regular Div.2 participant specializing in graph algorithms and dynamic programming.

LeetCode

1000+ Solved (Top 5%)

Expertise in advanced data structures and optimization techniques.

CodeChef

3-Star (1680 Rating)

Achieved +450 rating increase in a single contest, ranking 7th in Pakistan.

My Skills

Languages

C++

Expert

Python

Expert

Go

Advanced

TypeScript

Advanced

Java

Advanced

SQL

Advanced

ML Infrastructure

JAX

Expert

PyTorch

Advanced

XLA

Advanced

Scikit-learn

Expert

NumPy

Expert

Pandas

Expert

Backend & Systems

Node.js

Expert

Spring Boot

Advanced

BullMQ

Advanced

Redis

Advanced

Next.js

Expert

Prisma

Expert

DevOps & Data

PostgreSQL

Expert

Docker

Advanced

Google Cloud

Advanced

CI/CD

Advanced

Linux

Expert

Recent Projects

High-Concurrency AI Orchestrator

Engineered a high-throughput distributed orchestration engine in Go, implementing worker pools and channel-based concurrency to safely manage parallel LLM API workloads.

GitHub Demo

Distributed Media Streaming Platform

Designed scalable media backend with Spring Boot and PostgreSQL, featuring stateless JWT authentication and optimized payload chunking for low-latency streaming.

GitHub Demo

Education

Virtual University of Pakistan

Bachelor of Science in Computer Science (BSCS)

Expected 2029Karachi, Pakistan

Current Progress:2nd Semester

Currently pursuing Bachelor's degree with a focus on Computer Science fundamentals.

Core Technical Coursework

Data Structures & AlgorithmsDiscrete MathSystems ArchitectureCalculusIntroduction to ProgrammingDigital Logic DesignObject Oriented ProgrammingStatistics and Probability

Contact me

Send Us a Note and Initiate the Dialogue!

We’d love to hear from you! Whether you have questions, feedback, or just want to connect, reach out and let’s make it happen.

Karachi,Pakistan

(+92)342-8320022

absurw@gmail.com