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hamzazahid440

Hamza Zahid

@hamzazahid440

Expert Full Stack Developer

Pakistan
English
About me
Why Clients Hire Me - Experience building HIPAA-compliant products, including secure data handling, access controls, audit logging, and encryption best practices - Full-stack + AI expertise - Security- and compliance-aware development - Clean, production-ready code - Reliable communication and on-time delivery Backend & APIs - Node.js (MERN), NEST/EXPRESS, Django, Ruby on Rails, PHP - REST & GraphQL APIs - Authentication: JWT, OAuth2, Devise, Firebase Auth - Background jobs & queues (Redis, Sidekiq, Celery) Frontend - React.js, Vue.js, Next.js - Modern, responsive UI with TailwindCSS... Read more

Skills

h
hamzazahid440
Hamza Zahid
Offline • 
Average response time: 1 hour

See my services

Full Stack Web Applications
I will debug, optimize, and refactor your code
From$50 / projectMore details
AI Websites & Software
I will fine tune and evaluate llms for accuracy, safety, and performance
From$100 / projectMore details

Portfolio

Work experience

LLM Developer / AI Engineer

Turing • Full-time

Aug 2024 - Aug 2025 • 1 yr

Work Experience & Responsibilities Designed and developed Reinforcement Learning (RL) environments and custom RL gyms to train and evaluate intelligent agents for task-oriented and decision-making systems. Contributed to large-scale model training and evaluation projects for enterprise-level AI initiatives via Turing, supporting clients including Amazon and Microsoft. Trained, fine-tuned, and optimized Large Language Models (LLMs) for: Code generation and reasoning Instruction following and response quality Domain-specific knowledge adaptation Performed model evaluations including accuracy, hallucination detection, bias checks, and response consistency across edge cases. Worked on code-focused model training, improving reasoning over algorithms, data structures, debugging, refactoring, and system-design explanations. Created high-quality prompts, datasets, and task specifications to improve model performance and alignment. Conducted comparative testing across model versions to assess improvements and regressions. Collaborated with distributed AI research teams, following strict quality, security, and delivery guidelines. Core LLM & AI Skills Large Language Model Training & Fine-Tuning Reinforcement Learning (RL) & Custom Gym Environments Prompt Engineering & Prompt Optimization Model Evaluation, Benchmarking & Quality Analysis Code Intelligence Training (Algorithms, Debugging, Refactoring) Dataset Curation & Annotation Standards AI Safety, Bias Detection & Hallucination Reduction NLP Tasks (Instruction Tuning, Reasoning, QA) Engineering & Infrastructure Skills Python for AI & ML Pipelines Experiment Tracking & Model Comparison Version Control (Git-based workflows) Cloud-Based Training Environments API-Based Model Interaction & Testing

EZWEB ENTERPRISES

Full-time • 4 yrs

Senior Software Engineer

Aug 2022 - Aug 2024 • 2 yrs

Core Technical Skills Advanced Backend Development & System Architecture Scalable RESTful API Design & Implementation Full-Stack Application Development Database Architecture, Optimization & Query Tuning Performance Optimization & High-Availability Systems Secure Coding Practices & Application Security Third-Party API & Payment Gateway Integrations Cloud Deployment & Server Management CI/CD Pipelines & Release Management Code Refactoring & Legacy System Improvements Leadership & Senior-Level Skills Technical Leadership & Solution Ownership System Design & Architecture Decision-Making Mentoring & Guiding Junior Developers Code Reviews & Engineering Best Practices Enforcement Sprint Planning, Estimation & Task Breakdown Cross-Team Technical Coordination Translating Business Requirements into Technical Solutions Risk Analysis & Production Issue Resolution Stakeholder & Client Technical Communication Engineering & Process Skills Agile / Scrum Methodologies Version Control & Collaboration Workflows (Git) Test Planning, Debugging & Root Cause Analysis Documentation & Technical Knowledge Sharing Product Stability & Long-Term Code Maintainability

Software Engineer

Aug 2020 - Aug 2022 • 2 yrs

Key Responsibilities Designed, developed, and maintained scalable web applications using modern backend and frontend technologies. Built RESTful APIs and integrated third-party services to support business workflows and client requirements. Collaborated with cross-functional teams (design, QA, product) to deliver high-quality software solutions. Analyzed client requirements and translated them into technical specifications and functional implementations. Improved application performance, security, and reliability through optimization and refactoring. Fixed bugs, conducted code reviews, and ensured clean, maintainable, and well-documented code. Worked on database design, queries, and optimizations to ensure efficient data handling. Deployed applications, handled server-side configurations, and supported production issues. Followed Agile/Scrum methodologies, participated in sprint planning, stand-ups, and retrospectives. Skills Gained Technical Skills Backend Development (APIs, business logic, server-side architecture) Frontend Development (responsive UI, user-centric design) Database Design & Management (SQL/Relational Databases) API Integration & Third-Party Services Version Control (Git, GitHub/GitLab) Debugging, Testing & Code Optimization Deployment & Basic DevOps Practices Application Security & Performance Optimization