BUILDING
0
Open to work · Germany

Hassan Zafar.

I'm an AI Engineer who turns large language models into things that actually ship — RAG pipelines, agentic orchestration, and multimodal systems that survive contact with production.

3+
YEARS SHIPPING
ANTHROPIC CERTS
5
TEAMS & LABS
SCROLL
01About

I build production-ready, AI-powered systems that bridge large language models with real business workflows — and I genuinely enjoy the messy gap between a slick prototype and something a team can rely on.

Backed by two Anthropic certifications and 3+ years of full-stack engineering, I specialize in RAG pipelines, agentic orchestration, and multimodal architecture. I've taken AI systems from idea to production for research institutions, startups, and SMEs — currently as a Research Assistant at the Leibniz Institute (DIPF) while finishing my Master's in Fulda.

CURRENTLY
Research Assistant @ DIPF · Leibniz Institute
BASED IN
Fulda, Hesse — Germany
OPEN TO
Remote · On-site · Hybrid
02Toolkit

What I build with

AI Engineering

Claude APIAgentic WorkflowsTool UseMCPPrompt CachingPrompt EngineeringLangGraphLangChainLangSmithVercel AI SDK

Data & Retrieval

RAGpgvectorChromaDBMulti-Index SearchChunkingCohere RerankWhisperNLTKTensorFlow.jsComputer VisionMediaPipe

Full-Stack

Next.jsReactNode.jsExpressPythonDjangoSupabaseMongoDBWebSocketsAWSCeleryRedisRabbitMQ

& Also

TypeScriptJavaScriptReact NativeMERN StackBlockchainSolidityLTI Integration
03Selected work

Things I've built that I'm proud of

01 MULTIMODAL AI

Presentable

An AI presentation coach that watches you rehearse and gives real-time multimodal feedback — voice, posture, pacing — with heavy video work offloaded to an async Celery/Redis pipeline.

MediaPipeCeleryRedisReal-time
Visit Site →
02 RAG · MULTI-TENANT

ProposalAI (Draftly)

A multi-tenant, RAG-based proposal generator for SMEs. A two-pass LLM pipeline — an Analyst that reads the brief and a Writer that drafts — turns scattered context into polished, on-brand proposals.

RAGpgvectorTwo-pass LLMCohere Rerank
Visit Site →
03 GENERATIVE AUDIO

Sitaar

A generative-AI music platform built on ambient and systemic music concepts — endless, evolving soundscapes that compose themselves rather than loop. The fun, weird side project that keeps me curious.

Generative AIWeb AudioAmbientSystemic
sitaar.ai
Sitaar Generative Audio Platform
04 CHROME EXTENSION · AI CO-PILOT

EngageFlow AI

An open-source Chrome extension acting as a social media "co-pilot" directly in your browser sidebar. Leveraging the Claude API, it provides real-time, context-aware assistance to draft comments and posts 10x faster on LinkedIn and X.

Claude APIChrome ExtensionSidebar UIOpen Source
Visit Site →
05 DEVTOOLS · LLM TESTING

AgentReplay

Deterministic record/replay and regression-testing harness for LangGraph agents. Record every LLM call, tool response, clock value & RNG draw — then replay the exact sequence offline at ~$0 API cost to reproduce failures and diff prompts.

LangGraphRecord/ReplaypytestDeterministicLLM Testing
Visit Site →
04Experience

Where I've shipped

0%
faster load times — TTI 4.8s → 2s
0%
less manual review with a 3-tier AI feedback loop
0
apps built on a platform I helped ship

Research Assistant · DIPF — Leibniz Institute

Jun 2025 — Present
  • Cut page load times 65% (TTI 4.8s → 2s) via code-splitting, dynamic imports & lazy loading for heavy media (ReactPlayer, MediaPipe).
  • Built an Advanced Speech Analytics Engine with Vosk.js + the Web Audio API (FFT) for accurate real-time feedback.
  • Architected a 3-tier feedback system (AI → Self → Teacher), cutting manual review time by 70%.
  • Shipped a hover-to-comment transcription tool using the DOM TreeWalker API.

Mid-Level Software Engineer · Avialdo Solutions

Aug 2024 — Mar 2025
  • Cut LinkedUnion's core platform load times by 30% and improved responsiveness.
  • Helped build a platform that let contractors create 500+ mobile and web apps.
  • Implemented RESTful APIs with smooth real-time frontend–backend data flow.

Software Engineer II · Jumppace Pvt Ltd

Aug 2023 — Jul 2024
  • Built dynamic search, real-time chat & KPI dashboards in Next.js, React and Material UI.
  • Led interactive admin panels with live WebSocket updates.
  • Integrated third-party APIs (RevenueCat) and dynamic content filtering, optimized for mobile.

Full-Stack Developer · QBS Co

Jan 2023 — Aug 2023
  • Built the frontend for an immigration platform (fanuun.com) with a clean, user-friendly UI.
  • Improved file-upload workflows with Multer + Node.js.
  • Ran cross-browser & performance testing for a consistent experience everywhere.

Full-Stack Developer · Dappomatics

Jan 2022 — Oct 2022
  • Built a turnkey fuel-management system with seamless frontend–backend integration.
  • Optimized the CRM (pumpify.co) for quick loads and smooth interactions.
  • Designed dynamic, responsive React interfaces end to end.
05Education
2025 — Present

M.Sc. Global Software Development

Fulda University of Applied Sciences, Germany
2020 — 2024

B.S. Software Engineering

Sir Syed University, Karachi, Pakistan
2019 · Distinction

Advanced Diploma in Software Engineering

Aptech Education, Karachi
06Certifications

Building with the Claude API

May 2026
Anthropic · ID ugycevb5gwpw

Front-End Development with React

Jun 2024
Coursera

Google AI Essentials

Jun 2024
Coursera

Certified Blockchain Developer

2022
NAVTTC
07Let's talk

Got an AI idea
that needs to actually ship?

I'm open to remote, on-site, and hybrid roles across Germany — and always up for a good problem. Let's build something.