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Summary

Full Stack & AI Engineer with expertise in designing and developing scalable web applications and AI-driven solutions. Skilled in Python, TypeScript, React, Next.js, FastAPI, and cloud technologies, with hands-on experience building Large Language Model (LLM) applications, Retrieval-Augmented Generation (RAG) systems, and intelligent automation platforms. Proven ability to deliver production-ready software, optimize system performance, and solve complex technical challenges. Passionate about leveraging cutting-edge AI technologies to create impactful products and drive business innovation.

Professional Experience
01/2025 – 06/2026 | San Francisco, California, USA
  • •Designed and deployed 12+ production-grade AI applications leveraging LLMs, RAG pipelines, and multi-agent architectures using LangChain, LangGraph, and OpenAI APIs.
  • •Improved AI response accuracy by approximately 35% through prompt engineering, retrieval optimization, and systematic model evaluation techniques.
  • •Built and maintained 20+ AI workflows and integrations across OpenAI, Anthropic, and open-source models, supporting scalable cloud-based deployments.
  • •Led technical initiatives within a distributed team of 10+ engineers, contributing to architecture decisions, mentoring, and AI engineering best practices.
    • Full Stack Developer, Prefect / Remote⁠
    01/2023 – 12/2024 | Washington, DC, USA
  • •Delivered 20+ full-stack features across AppFlowy, AI-SaaS Platform, and Plane using Next.js, TypeScript, Python, and PostgreSQL, contributing to major product releases and user-facing enhancements.
  • •Improved application performance by approximately 25% through API optimization, database tuning, caching strategies, and frontend performance improvements.
  • •Designed, implemented, and maintained 30+ RESTful API endpoints and integrations, including authentication, subscription billing, and AI-powered workflows.
  • •Collaborated with distributed teams of 15+ engineers and progressively took ownership of feature delivery, participating in code reviews, sprint planning, and technical design discussions.
    • Junior Full Stack Developer, Weaviate / Remote⁠
    01/2022 – 12/2022 | Amsterdam, Netherlands
  • •Contributed to the development of 8+ frontend and backend features using Next.js, TypeScript, and Node.js for an open-source SaaS platform.
  • •Improved application performance by approximately 12% through database query optimization and API enhancements.
  • •Implemented and maintained 10+ RESTful API endpoints and PostgreSQL database integrations.
  • •Collaborated with a distributed team of 10+ engineers, participating in code reviews, sprint planning, and Agile development processes.
    • Skills
    Python
    C/C++
    JavaScript
    Typescript
    React
    Next.js
    Node.js
    FastAPI
    LangGraph
    LangChain
    AI Agents
    Agentic AI
    Large Language Models (LLMs)
    Retrieval-Augmented Generation (RAG)
    OpenAI API
    Prompt Engineering
    Hugging Face Transformers
    PyTorch
    PostgreSQL
    MongoDB
    Redis
    Vector Database
    AWS
    Docker
    Kubernetes
    Git
    GitHub
    CI/CD
    RESTful APIs
    Linux
    Microservices
    Cloud Computing
    System Design
    Machine Learning
    Deep Learning
    MLOps
    Azure
    Vercel AI SDK
    LangSmith
    GCP
    Terraform
    GraphQL
    Education
    Bachelor's Degree in Computer Science, Warsaw University of Technology⁠
    10/2018 – 06/2021 | Warsaw, Poland
    Languages
    English
    Polish
    Larry Margerum
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    AI Engineer Intern, Tooploox⁠
    06/2021 – 12/2021 | Wrocław, Poland
  • •Contributed to the development and evaluation of 5+ NLP models using PyTorch and Hugging Face Transformers for text classification and question-answering tasks.
  • •Built data preprocessing pipelines that reduced dataset preparation time by approximately 20% across multiple machine learning experiments.
  • •Assisted in training and benchmarking transformer-based models on datasets containing over 100,000 text samples.
  • •Participated in the delivery of 3 AI proof-of-concepts for enterprise clients in collaboration with senior engineers and data scientists.
    • Larry Margerum
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