← jurec.pl

Jan Jurec

Senior Software Engineer

w/ MLOps & Agents Mentor

Jan Jurec

Email: jan@jurec.pl

Phone: +48 663 524 707

Location: Poland

Web: jurec.pl

Intro

Versatile and experienced professional with 10+ years in software engineering, excelling in DevOps, MLOps, and backend roles. Primary skills include AWS, Python, and Infrastructure as Code. Passionate about solving complex problems through an analytical approach, with strong time management and collaborative spirit. Thriving in smaller teams with high autonomy.

Recent stack: AWS, Azure, pure metal, Python, Bash, Claude, MCPs, agents, RAGs, SQL/vector/noSQL.

Jobs

Santander Bank Polska

Senior Software Engineer w/ MLOps & Agents Mentor (2025 - Present)

  • Modernized a core AI platform: decomposed a monolithic solution into microservices with clearer ownership and better scalability
  • Delivered and improved AI-powered SDLC tools used across the organization, including domain-specific LLM applications for chatbot workflows, document analysis, Jira ticket analysis, test generation, and image classification
  • Improved platform reliability through better performance, logging, observability, production debugging, and deep code reviews
  • Created multiple MCP servers, subagent specifications, and internal Python packages for database communication
  • Served as a key technical contributor resolving production and infrastructure issues, reducing code complexity, and bringing strong Unix and platform troubleshooting expertise

Nordea

Senior MLOps Engineer (2024 - 2025)

  • Contributed to MLOps, RAG, and AI platform solutions supporting machine learning workflows and scalable AI/ML adoption
  • Set up infrastructure-as-code foundations for structured, repeatable cloud provisioning (AWS, Terraform)
  • Designed reliable data pipelines ensuring efficient, well-orchestrated, production-ready data flows
  • Helped define foundations for teams to build, deploy, and operate AI/ML solutions in a compliant and scalable way
  • Reduced manual effort and operational risk while improving scalability and delivery consistency

TUI

Senior DevOps Engineer w/ MLOps & Backend (2021 - 2024)

  • Foundational member of Machine Learning Lab created by Principal ML Engineer at TUI
  • Implemented and maintained ML-specific pipelines (StepFunctions, SageMaker, Glue, ECS)
  • Designed and maintained projects using team's AI solutions with added API logic
  • Supported the implementation of the first AI assistant in TUI and the first RAG pipeline
  • Created and maintained internal tools package (Bash, boto3, threading, Docker)
  • Autonomously deployed endpoint and infrastructure handling millions of requests per day
  • Designed multi-environmental deployment processes (Terraform, CDK, CloudFormation)
  • Rolled out code quality steps into dozens of CI/CD pipelines (black, pre-commit, pylint, SonarQube, tests)
  • Integrated systems with Datadog, created dashboards for app performance monitoring
  • Collaborated with multiple external teams to align products and interfaces (FastAPI, Lambda, SQS, SNS)

Zdrowa, tylko ma bialaczke

Infrastructure Specialist & WordPress Wizard (2023 - 2025)

  • Set up and managed custom WordPress instance with data retention and high availability using EC2 and LAMP

3e9 Systems

Remote Software Engineer (2019 - 2024)

  • Created Python GUI component for distributed IoT system using websockets, PyQt5, AWS Lambda, AWS Greengrass
  • Designed and implemented backend service for real-time communication application relying on external mail APIs (MS, Google)
  • Developed features for Odoo ERP and CRM framework for autonomous stores
  • Introduced dockerized FastAPI project template for future microservices
  • Designed and implemented asynchronous microservices for debit card payment (idempotency)
  • Migrated on-premise application to AWS cloud: from bare-metal to ECS and Lambda (Python)

Kodilla

Python Mentor (2020 - 2022)

  • Mentored students across Backend, Big Data, Data Science, Machine Learning, and Automated Testing

Xebia Poland

Software Engineer (2018 - 2019)

  • Migrated client infrastructure to AWS using Terraform, Puppet, and Packer
  • Designed and implemented CI/CD solution for AWS microservices
  • Developed and peer-reviewed Python 3 code for AWS Lambda
  • Ran AWS practical workshops preparing for certification

Clearcode

Software Engineer (2017 - 2018)

  • Designed DMP and exchange (AdTech) systems run on AWS (ECS, VPC, ASG, LB, R53, Lambda, EMR)
  • Part of Hamburg-Wroclaw 10-person team with infra/dev focus
  • Built <20ms @ 30k rps modular AWS system

Clearcode

Python Developer (2017 - 2018)

  • Designed and built DMP systems on AWS
  • Wrote Python 3.6 JSON-juggling, machine-learning, API-calling code in a SCRUM framework

Nokia

Working Student, Big Data & Network Engineering (2016 - 2017)

  • Telco data analysis and interactive presentation (Jupyter, Bokeh, Pandas)
  • Part of machine learning team (NumPy, scikit-learn)
  • CI and dockerization of existing codebase (Jenkins, GitLab CI, S3, Sphinx)
  • Testing, documenting, and maintaining web tools (requests, pytest, Flask)

Nokia

Summer Trainee, Software Configuration Management (2016)

  • Migrated codebase from Python 2 to Python 3, created unit and functional tests using GitLab CI
  • Designed new system from scratch with CI/CD using Docker Compose (Redmine, Redis, Flask, Celery, S3)

AI & Machine Learning

Current Focus

  • Agentic AI
  • MCP Servers
  • RAG Pipelines
  • LLM Applications
  • Claude
  • AI Agents
  • SageMaker
  • MLflow
  • MLOps
  • Vector DBs

Applied Experience

Built MCP servers and subagent specs at Santander. First RAG pipeline and AI assistant at TUI. MLOps platforms at Nordea. AI-powered SDLC tools for chatbot workflows, document analysis, test generation, and image classification.

Projects

readable-pylint-messages — 148★ on GitHub

  • List of pylint human readable message IDs and dev readable codes

Workshops & Presentations @ TUI

  • MLOps Workshop — Hackathon for ML Lab: customer segmentation & end-to-end MLOps workflow
  • Bedrock Agents — Building AI bots with Amazon Bedrock
  • Stable Diffusion — Deploying Stable Diffusion for text-to-image generation

Skills

Primary

AWS, Python, Bash, Terraform, CDK, Docker, CI/CD, Infrastructure as Code, MLOps, DevOps

Cloud & Infra

AWS (ECS, Lambda, StepFunctions, Glue, SQS, SNS, S3, R53, VPC), Azure, Terraform, CloudFormation, Datadog, SonarQube

Backend

Python, FastAPI, Flask, SQL, NoSQL, Vector DBs, REST APIs, Microservices

Soft Skills

Mentoring, Technical Leadership, Cross-functional Collaboration, Remote Work, Time Management

Languages

Polish

Native or Bilingual

English

Professional Working

Education

Wroclaw University of Science and Technology

Master's degree, Computer Science (2018 - 2019)

Wroclaw University of Science and Technology

Bachelor of Science in Engineering, Computer Science (2012 - 2017)

Amazon Web Services

AWS Certified Solutions Architect — Associate (Issued Jan 2019)