Tomasz Zdunek
Tomasz Zdunek

Senior Software Engineer

Not looking · Member since 15 Oct 2026
Location
Warsaw, Poland
Desired salary
Confidential
Work preference
Remote Only
Experience level
Senior

About

Professional summary

I am a Senior Software Engineer with more than 15 years of experience building scalable web platforms, distributed backend systems, and cloud-native applications across healthtech, fintech, travel, and telecommunications.

I specialize in JavaScript, TypeScript, Python, Java, and C#, with extensive hands-on expertise in React, Next.js, Node.js, NestJS, FastAPI, Django, Spring Boot, and ASP.NET Core. I build performant user experiences and reliable API-driven microservices.

I have deep experience designing AI-powered healthcare workflows, including LLM integrations, RAG pipelines, AI agents, vector search, clinical documentation automation, and MLOps practices. I prioritize secure handling of sensitive data and compliance-conscious architecture.

I work extensively with AWS, Azure, GCP, Kubernetes, Docker, Terraform, CI/CD automation, observability, and high-availability systems. My work has supported millions of users, high-throughput transactions, and real-time data processing workloads.

I am experienced in technical leadership, mentoring, cross-functional collaboration, and modern Agile delivery. I focus on pragmatic engineering, measurable performance improvements, maintainable systems, and delivering meaningful business outcomes.

Skills

46 capabilities

Tech stack & tools

Working toolkit

Analytics

Application Hosting

Application Utilities

Collaboration

Design

Languages & Frameworks

Libraries

Experience

Career history

Senior Software Engineer PEER39

I architected an AI-powered clinical documentation and telehealth platform for secure healthcare collaboration. I built React and Next.js interfaces using TypeScript and Tailwind CSS, reducing clinician note-taking time by 42% for more than 12,000 active users. I also developed LLM-driven clinical documentation capabilities using RAG-based medical knowledge retrieval.

I engineered LangChain, OpenAI API, Pinecone, Python, and FastAPI services; built AI agents with LangGraph and Hugging Face; and developed Node.js and NestJS microservices serving more than 3 million daily requests. I implemented HIPAA-conscious encryption, audit logging, RBAC, CI/CD, Kubernetes deployment, and observability, while mentoring six junior engineers.

Senior Frontend and Backend Engineer UBS

I delivered a real-time financial analytics and compliance dashboard for wealth management and investment banking workflows. I built React and Angular dashboards using TypeScript, Redux, and Tailwind CSS to provide real-time portfolio insights to more than 5,000 financial advisors.

I engineered Java Spring Boot microservices, Python FastAPI compliance services, REST and GraphQL APIs, and Kafka-based streaming systems processing 1.2 million transactions per hour. I deployed containerized services on Azure Kubernetes Service and improved infrastructure provisioning, API response times, deployment frequency, and production uptime through Terraform, CI/CD, and observability tooling.

Full Stack Software Engineer Sabre Airline Solutions

I modernized airline booking and real-time availability systems from monolithic applications into cloud-native microservices. I developed React and Next.js booking interfaces for more than 2 million monthly active travel agents across 60 countries, alongside Node.js, NestJS, Python, and Django backend services.

I implemented Kafka and Redis event streaming for real-time seat inventory, deployed workloads on AWS using Docker, Kubernetes, Terraform, and Ansible, and built automated CI/CD delivery pipelines. I also optimized PostgreSQL and MySQL performance, improved observability, and mentored more than 10 engineers on cloud-native, microservice, and frontend engineering practices.

Software Engineer Nokia Siemens Networks

I developed telecom network management and real-time monitoring software for 4G/LTE network operators. I built Java and Spring Boot services for fault detection, JavaScript and Angular dashboards for network visualization, and C# ASP.NET Core services for performance analytics.

I implemented REST and GraphQL interfaces for diagnostics and network configuration, automated deployments with Linux, Bash, Docker, and Jenkins, and optimized PostgreSQL and MySQL databases for large time-series datasets. I also integrated Prometheus and Grafana monitoring and collaborated in Agile/Scrum teams to deliver major releases without critical production incidents.

Education

Learning history

Wroclaw University of Science and Technology

Master's Degree, Computer Software Engineering

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