Andrzej – Python, LLM, AI agent development, experts in Lemon.io

Andrzej

From Poland (UTC+2)flag

AI Agent Architect|Senior
Back-end Web Developer|Senior

Andrzej – Python, LLM, AI agent development

Andrzej is a Senior Software Engineer with 10+ years of experience developing production software systems, specializing in Python, backend development, and LLM-powered applications. His recent work focuses on building multi-agent conversational systems, developing agent orchestration engines and SDKs, and integrating LLM capabilities into enterprise platforms. He has hands-on experience with Python, FastAPI, gRPC, Pydantic, and LLM integrations, including OpenAI and Anthropic models, alongside technical leadership and direct collaboration with business stakeholders. His background also includes developing and optimizing production text-to-speech systems for automotive and consumer devices.

11 years of commercial experience in
AI
Aviation
Business intelligence
Cloud computing
Life science
Smart home
Tourism
Travel
AI software
Mobile apps
Software development
Main technologies
Python
11.5 years
LLM
2.5 years
AI agent development
2.5 years
Additional skills
OpenAI
Typescript
React
Anthropic
AWS
Kafka
gRPC
Java
PyTorch
Tensorflow
C++
Machine learning
Multi-Agent Systems
Direct hire
Possible
Ready to get matched with vetted developers fast?
Let’s get started today!

Experience Highlights

Founding & Forward-Deployed AI Engineer
Sep 2025 - Jun 20269 months
Project Overview

An enterprise AI agent development platform built for a global manufacturing corporation, enabling business units to develop and deploy LLM-powered and other AI agents. The platform provides a shared SDK, agent orchestration engine, evaluation tools, and low-code development capabilities to support AI solutions tailored to different business needs.

Responsibilities:
  • Developed the core SDK and agent orchestration engine as one of the founding engineers, becoming the project's second-largest contributor;
  • Collaborated directly with business units to gather requirements and adapt AI solutions to their operational needs;
  • Contributed to the agent evaluation framework, CLI, low-code agent builder, and developer tooling across multiple engineering teams;
  • Developed agentic prototypes for manufacturing production forecasting and real-time visitor guidance;
  • Trained a gradient-boosted purchase-intent model for visitor guidance, achieving approximately 0.95 AUC and 80× lift among top-ranked leads.
Project Tech stack:
Python
Typescript
React
Flutter
FastAPI
BigQuery
AWS
PostgreSQL
Redis
Kafka
LLM
OpenAI
Anthropic
LLaMA
MCP
WebRTC
gRPC
Founding & Forward-Deployed AI Engineer
Sep 2025 - Jun 20269 months
Project Overview

An AI-powered in-flight assistant developed for a global aviation technology provider and designed for aircraft seat-back entertainment systems. Built on an enterprise agent platform, the solution combines a conversational avatar, voice interaction, and layover planning to help passengers manage travel disruptions, arrange accommodations and transportation, and plan local activities.

Responsibilities:
  • Developed an AI-powered in-flight assistant using an enterprise agent platform, integrating conversational AI, an interactive avatar, voice capabilities, and layover planning;
  • Delivered the solution for integration with aircraft seat-back entertainment systems;
  • Demonstrated the product to representatives of major international airlines at Aircraft Interiors Expo.
Project Tech stack:
Python
Typescript
React
Flutter
FastAPI
BigQuery
AWS
PostgreSQL
Redis
Kafka
LLM
OpenAI
Anthropic
LLaMA
MCP
WebRTC
gRPC
Senior AI/ML Engineer
Mar 2024 - Sep 20251 year 5 months
Project Overview

An LLM-powered family wellness assistant developed for a global technology company, designed to help families coordinate shared goals, schedules, and personalized recommendations.

Responsibilities:
  • Led the development of the multi-agent conversational AI system from scratch as the project's primary developer and largest contributor;
  • Implemented agent coordination capabilities for managing family goals, scheduling, and personalized recommendations;
  • Advanced the product through internal dogfooding and trusted-tester programs with real families;
  • Developed shared agent libraries and reusable service and agent templates adopted across the engineering team;
  • Collaborated directly with Anthropic engineers during a strategic partnership to support AI development.
Project Tech stack:
Python
LLM
OpenAI
Anthropic
Pydantic
gRPC
Senior Software Engineer
May 2015 - May 20249 years
Project Overview

A fully offline neural text-to-speech (TTS) system developed for in-vehicle voice applications at major automotive manufacturers. The solution enables natural-sounding speech synthesis directly on embedded devices without requiring an internet connection, while maintaining a compact model size and low audio-generation latency.

Responsibilities:
  • Developed the core of an offline neural text-to-speech engine deployed in production vehicles;
  • Served as technical lead of the on-device TTS engineering team, guiding technical development and implementation;
  • Optimized English neural voice models to fit within 150 MB while achieving approximately 2× real-time synthesis speed and under 200 ms latency to first audio on Pixel 4 XL-class hardware.
Project Tech stack:
C
C++
Java
Python
Tensorflow
PyTorch

Education

2020
Computer Science
Master of Engineering
2019
Computer Science
Bachelor of Engineering

Languages

Polish
Advanced
English
Advanced

Hire Andrzej or someone with similar qualifications in days
All developers are ready for interview and are are just waiting for your requestdream dev illustration
Copyright © 2026 lemon.io. All rights reserved.