JACON WILLIAM

Available to hire

I’m an AI Engineer and Senior ML/Backend professional based in Gdańsk, building production-grade intelligent systems that combine LLMs, RAG, vector search, and scalable web backends.

About

I’m an AI Engineer and Senior ML/Backend professional based in Gdańsk, building production-grade intelligent systems that combine LLMs, RAG, vector search, and scalable web backends. I’ve worked across semantic search, hybrid search with metadata filtering, and deployment-focused engineering—turning AI capabilities into reliable APIs and business-ready products.

Over the past several years, I’ve contributed to and led AI infrastructure at vector-search platforms (Weaviate, Qdrant) and shipped full-stack services involving authentication, real-time data, analytics pipelines, and ML-enhanced features. I enjoy designing systems that handle real-world constraints—performance, scaling, and maintainability—while delivering useful experiences for customer service, CRM automation, and multimodal AI use cases.

  • 5 years' experience

Industry experience

  • Software & Internet
  • Computers & Electronics
  • Professional Services

Work experience

Senior ML / Backend Engineer · WeaviateJan 2023 – Jul 2025 · 2 yrs 7 mos

Built and maintained scalable vector-search and embedding infrastructure for production workloads. Implemented Python + FastAPI microservices delivering semantic search and Retrieval-Augmented Generation (RAG) APIs. Led production deployment, scaling, performance optimization, and added hybrid search with metadata filtering features.

Machine Learning Engineer · QdrantApr 2021 – Nov 2022 · 1 yr 8 mos

Contributed to an early open-source vector-search engine team, helping implement core capabilities such as embedding storage and nearest-neighbor search (HNSW/ANN). Worked on API development and deployment configurations for cloud and on-prem. Used FastAPI, Python, Next.js, JavaScript, and also supported embedded software components during the company’s Series-A phase.

Full-Stack Developer / Data Scientist · AppwriteMay 2019 – Mar 2021 · 1 yr 11 mos

Built backend services in Node.js/TypeScript with Express for user authentication and real-time database APIs. Designed data storage and analytics pipelines, adding basic ML-powered usage analytics and recommendation features. Developed React admin/analytics dashboards, CI/CD pipelines, and deployment scripts, contributing to the open-source Backend-as-a-Service platform (appwrite.io).

Education

Master’s Degree in Computer Science · The University of Texas at San Antonio2022
Bachelor’s Degree in Computer Science · Texas State University2017

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