Tamás Eppel - Senior Software Developer / Tech Lead

Q: Where is Tamás based?

Tamás is based in Munich, Germany .

Q: What languages does Tamás speak?

Tamás speaks the following languages: German (Native), Hungarian (Native), English (Advanced), Italian (Elementary) .

Q: How many years of experience does Tamás have?

Tamás has at least 20 years of experience. During this time, Tamás has worked in at least 11 different roles and for 12 different companies . The average length of individual experience is 1 year and 2 months . Note that Tamás may not have shared all experience and actually has more experience.

Q: What is Tamás's latest experience?

Tamás's most recent position is Senior Software Developer / Tech Lead at NDA (defense / OSINT) .

Q: What companies has Tamás worked for in recent years?

In recent years, Tamás has worked for NDA (defense / OSINT) , Zalando , Wacker Chemie , and MediaMarktSaturn .

Q: Which industries is Tamás most experienced in?

Tamás is most experienced in industries like Retail , Fashion , and Information Technology . Tamás also has some experience in Chemical , Banking and Finance , and Automotive .

Q: Which business areas is Tamás most experienced in?

Tamás is most experienced in business areas like Information Technology , Product Development , and Project Management . Tamás also has some experience in Research and Development and Operations .

Q: Which industries has Tamás worked in recently?

Tamás has recently worked in industries like Chemical , Retail , and Fashion .

Q: Which business areas has Tamás worked in recently?

Tamás has recently worked in business areas like Information Technology and Product Development .

Recommended expert

Munich, Germany

Check rate

Experience

Jan 2026 - Present

6 months

Senior Software Developer / Tech Lead

NDA (defense / OSINT)

Designing the audit logging framework
Implementing APIs for developers to integrate in their codebase
Implementing ingestion pipeline, database query layer and UI for browsing the audit events
Improving stability and reliability of the backend system

Oct 2025 - May 2026

8 months

Senior Software Developer

Zalando

Developing the migration from Styra DAS to OPA Control Plane, integrating OCP within Java-based services and contributing to architectural decisions on deployment models
Contributing to architectural design decisions for enterprise policy management infrastructure, evaluating service-based versus command-line deployment approaches
Working across Java and Golang technology stacks, analyzing OPA Control Plane source code to inform integration implementation decisions

May 2022 - Oct 2025

3 years 6 months

Senior Software Architect

Wacker Chemie

Architected comprehensive microservices migration strategy from legacy monolithic applications to modern C#/.NET-based distributed systems
Designed and implemented seamless frontend migration framework enabling zero-downtime transition from legacy systems to React.js and Next.js applications
Led software architecture redesign and drove critical technical decisions across 7-member development team during enterprise application modernization
Developed RESTful APIs and GraphQL interfaces as core integration layer for new microservices architecture while maintaining legacy system compatibility

Sep 2020 - Apr 2022

1 year 8 months

Full Stack Software Developer

MediaMarktSaturn

Designed and developed RESTful API architecture for third-party marketplace platform enabling external sellers to integrate with MediaMarktSaturn e-commerce ecosystem
Built scalable Node.js backend services using NestJS framework and implemented new marketplace functionality with TypeScript for enhanced code reliability and maintainability
Developed responsive backoffice frontend applications using React.js to manage marketplace operations, vendor onboarding, and administrative workflows
Executed Java 8 to Java 11 migration for Spring Boot backend services and deployed full-stack marketplace solution on Google Cloud Platform with comprehensive monitoring infrastructure

Aug 2020 - Jan 2021

6 months

Senior Software Architect, Full Stack Software Developer

Inacore GmbH

Architected microservices-based system for automated 3D printing order management, replacing manual job handling processes with scalable digital workflow solution
Designed comprehensive REST API architecture and developed Kotlin Spring Boot backend services with PostgreSQL database integration for order processing and job queue management
Built responsive customer-facing and back-office frontend applications using React.js to enable seamless order creation, status tracking, and administrative print job management
Delivered proof-of-concept application suite that digitized entire 3D printing workflow from order intake through production scheduling, eliminating manual task dependencies

Feb 2018 - Aug 2020

2 years 7 months

Senior Software Architect, Full Stack Software Developer

Audi, TechMatrix

Designed software architecture for data analytics platform enabling side-by-side comparison of multiple machine learning algorithms and real-time performance benchmarking
Built end-to-end data ingestion pipeline with React.js frontend and multiple backend services, deployed via CI/CD pipeline on AWS infrastructure

Sep 2017 - Jan 2019

1 year 5 months

Full Stack Software Developer

Atomic Coders internal project

Developed real-time cryptocurrency arbitrage trading platform using TypeScript, React.js with GraphQL frontend, and Node.js backend with RxJS and WebSocket integration for live market data processing
Built PostgreSQL database pipeline with migration system, implemented trading platform APIs, and established CI/CD pipeline with comprehensive monitoring and system metrics infrastructure

Sep 2017 - Jan 2018

5 months

Senior Software Architect, Full Stack Software Developer

Audi, TechMatrix

Bootstrapped React.js frontend development and established build pipeline for enterprise internal tool supporting dynamic widget-based user interface architecture
Refactored Spring Boot backend codebase and redesigned system architecture to enable scalable widget integration and big data analytics processing
Designed database schema and microservices architecture supporting multi-team widget development with centralized data management and user configuration
Prototyped dynamic widget loading mechanism enabling real-time component integration and advanced from Full Stack Developer to Lead Developer to Software Architect

Oct 2016 - Jun 2017

9 months

Head of IT

Laundry Angels GmbH

Led technology strategy and technical direction for startup, managing internal development team and coordinating external contractor relationships while balancing refactoring budgets with feature delivery
Architected legacy system migration roadmap and executed step-by-step transition to modern technology stack, ensuring minimal business disruption during transformation
Managed cross-functional collaboration between technology and business teams, creating technical specifications for external developers and conducting code reviews for all internal and external contributors
Established backend system monitoring and maintenance protocols while designing and implementing new software components and features aligned with business objectives

Jun 2016 - Sep 2016

4 months

DevOps Engineer

Evosoft / Siemens

Provisioned and managed Kubernetes clusters on AWS for Industry 4.0 software deployment, implementing automated CI/CD pipelines and developing cluster management scripts for multi-team development environment
Established comprehensive monitoring infrastructure using Prometheus and modified software architecture to enable automated deployment and real-time monitoring capabilities across distributed systems

Mar 2015 - May 2016

1 year 3 months

Senior Engineering Manager

Zalando

Led 4 autonomous development teams totaling 25 engineers across Article Management, Stock Services, Risk Management, and Payment Analytics domains, providing technical coaching, OKR implementation and architectural guidance
Established technical vision and validated technology decisions for multi-team organization while conducting hiring interviews, optimizing team composition, and delivering people leadership in restructured agile environment

Jan 2015 - Mar 2015

3 months

Senior Backend Engineering Manager - Risk Management

Zalando

Led Risk Management engineering team implementing machine learning algorithms and scalable data architecture that reduced company fraud losses by tens of millions of euros through advanced customer risk assessment
Drove architectural vision and core system refactoring for high-volume risk detection platform, managing team composition and technical decisions to deliver enterprise-scale fraud prevention solutions

Mar 2011 - Dec 2014

3 years 10 months

Backend Team Lead

Zalando

Managed backend engineering team of 6-10 developers, making architectural decisions for system components and leading resource allocation while maintaining production server operations and database management
Drove platform-wide technology decisions for entire engineering organization, including library selection, technical problem-solving approaches, and contributing to company-wide architectural standards like Zalando REST API Guidelines
Conducted technical interviews and optimized team composition while designing company interview processes and delivering onboarding training programs for new engineering hires
Operated live production systems with hands-on troubleshooting of database and server issues, performing regular deployment operations and ensuring system reliability across critical infrastructure

May 2010 - Feb 2011

10 months

Backend Developer

Zalando

Contributed to complete rewrite of Zalando e-commerce platform from PHP/Magento to Java ecosystem, developing critical address normalization component and external system integrations for payment, logistics, and voucher systems
Built reusable Java libraries and communication interfaces for payment providers, dunning systems, and logistics platforms that became foundational components still utilized across current software architecture

Feb 2009 - Apr 2010

1 year 3 months

Backend Developer

Fox Mobile GmbH

Developed Java/J2EE web services for payment provider testing and integration, creating new payment provider implementations and API bindings for financial transaction processing systems

Feb 2007 - Feb 2009

2 years 1 month

Backend Developer

Morgan Stanley

Served dual role as Release Management team member and multi-language backend developer, handling requirements gathering, software design, and system implementation across enterprise financial systems

Aug 2005 - Aug 2006

1 year 1 month

Backend Developer

Nokia Hungary Ltd

Developed mobile-web integration solutions including web applications and mobile phone applications, contributing innovative ideas for patent research in emerging mobile technology convergence

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Retail, Fashion, Information Technology, Chemical, Banking and Finance, and Automotive.

Retail

Fashion

Information Technology

Chemical

Banking and Finance

Automotive

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Product Development, Project Management, Research and Development, and Operations.

Information Technology

Product Development

Project Management

Research and Development

Operations

Summary

Tamás Eppel brings over 15 years of software architecture and full-stack development expertise across e-commerce, manufacturing, and fintech sectors. Technical specialization includes designing scalable microservices architectures with Java, C#/.NET, Spring Boot, and Node.js backends, coupled with React, NextJS, and TypeScript frontend implementations.

Career highlights at Zalando, MediaMarktSaturn, and Wacker Chemie demonstrate consistent delivery of enterprise system migrations, REST/GraphQL API design, CI/CD pipeline implementation, and cloud deployments across AWS, Azure, and Google Cloud platforms.

Leadership experience encompasses managing development teams up to 10 members, driving platform-wide architectural decisions, and executing complex legacy-to-microservices transformations while maintaining operational excellence and delivering measurable business value through modern technology solutions.

Skills

Programming Languages

Java - 15 Years
Javascript/Typescript - 8 Years
Python - 10 Years
C# - 4 Years
Sql - 15 Years
Kotlin - 3 Years
Shell Scripting - 12 Years
Perl - 8 Years
Regular Expressions - 15 Years
Php - 6 Years
C++ - 5 Years
C - 4 Years
Visual Basic/Vba - 3 Years

Frameworks & Technologies

Spring Framework/Spring Boot - 12 Years
.Net Framework/.Net Core - 4 Years
Asp.Net Core - 3 Years
React.Js/Reactjs - 7 Years
Next.Js/Nextjs - 3 Years
Node.Js/Nodejs - 7 Years
Nestjs - 3 Years
Redux - 6 Years
Graphql - 5 Years
Rest Api Development - 15 Years
Apache Spark - 4 Years
Apache Beam - 3 Years
Rxjs - 5 Years
Websockets - 6 Years
Jax-Ws - 8 Years
Jaxb - 8 Years
Jpa (Java Persistence Api) - 12 Years
Ejb 3 (Enterprise Javabeans) - 6 Years
Jmx (Java Management Extensions) - 8 Years
Apache Cxf - 6 Years
Junit Testing Framework - 15 Years
Keycloak Authentication - 2 Years

Cloud Platforms & Devops

Amazon Web Services (Aws) - 8 Years
Microsoft Azure Cloud - 3 Years
Google Cloud Platform (Gcp) - 4 Years
Docker Containerization - 6 Years
Kubernetes Orchestration - 4 Years
Ci/Cd Pipeline Development - 10 Years
Jenkins Automation - 8 Years
Ansible Configuration Management - 6 Years
Prometheus Monitoring - 6 Years
Grafana Visualization - 4 Years
Nginx Web Server - 8 Years
Devops - 8 Years
Cloud Native - 4 Years

Databases & Data Technologies

Postgresql - 12 Years
Mysql - 10 Years
Redis Cache - 6 Years
Db2 Database - 4 Years
Oracle Database - 3 Years
Sybase Database - 2 Years
Database Migration Management - 8 Years
Data Pipeline Development - 6 Years

Development Tools & Environments

Intellij Idea - 12 Years
Eclipse Ide - 10 Years
Pycharm - 6 Years
Vim Editor - 15 Years
Git Version Control - 10 Years
Svn (Subversion) - 8 Years
Perforce - 4 Years
Cvs (Concurrent Versions System) - 3 Years
Bazaar Version Control - 2 Years
Apache Ant Build Tool - 8 Years
Jira Project Management - 10 Years
Fisheye Code Review - 6 Years
Crucible Code Review - 6 Years

Web Technologies & Markup

Html5 - 12 Years
Css3 - 12 Years
Xml Processing - 15 Years
Xpath Query Language - 10 Years
Xslt Transformation - 8 Years
Ajax Development - 12 Years
Responsive Web Design - 8 Years

Architecture & Design Patterns

Microservices Architecture - 6 Years
Service-Oriented Architecture (Soa) - 12 Years
Software Architecture Design - 10 Years
System Integration Patterns - 12 Years
Api Design Patterns - 12 Years
Database Schema Design - 15 Years
Scalable System Design - 10 Years

Languages

German

Native

Hungarian

Native

English

Advanced

Italian

Elementary

Education

Oct 2002 - Feb 2003

Technical University of Karlsruhe

Exchange Semester Program · Information Technology · Karlsruhe, Germany

Sep 2000 - Jun 2006

Budapest University of Technology and Economics

Master of Science · Technical Informatics · Budapest, Hungary

Certifications & licenses

Data Analyst Nanodegree

Udacity

Statistics

Experience

Total positions 17

Experience in Retail 8 y

Avg length 1 y 3 m

Longest experience 3 y 9 m

Expertise

Recent roles Senior Software Developer / Tech Lead, Senior Software Developer, Senior Software Architect

Main industries Retail, Fashion, Information Technology

Main business areas Information Technology, Product Development, Project Management

Qualifications

Highest degree Master

Certifications earned 1

Profile

Created

June 2026

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Frequently asked questions

Have questions? Find more information here.

Where is Tamás based?

Tamás is based in Munich, Germany.

What languages does Tamás speak?

Tamás speaks the following languages: German (Native), Hungarian (Native), English (Advanced), Italian (Elementary).

How many years of experience does Tamás have?

Tamás has at least 20 years of experience. During this time, Tamás has worked in at least 11 different roles and for 12 different companies. The average length of individual experience is 1 year and 2 months. Note that Tamás may not have shared all experience and actually has more experience.

What roles would Tamás be best suited for?

Based on recent experience, Tamás would be well-suited for roles such as: Senior Software Developer / Tech Lead, Senior Software Developer, Senior Software Architect.

What is Tamás's latest experience?

Tamás's most recent position is Senior Software Developer / Tech Lead at NDA (defense / OSINT).

What companies has Tamás worked for in recent years?

In recent years, Tamás has worked for NDA (defense / OSINT), Zalando, Wacker Chemie, and MediaMarktSaturn.

Which industries is Tamás most experienced in?

Tamás is most experienced in industries like Retail, Fashion, and Information Technology. Tamás also has some experience in Chemical, Banking and Finance, and Automotive.

Which business areas is Tamás most experienced in?

Tamás is most experienced in business areas like Information Technology, Product Development, and Project Management. Tamás also has some experience in Research and Development and Operations.

Which industries has Tamás worked in recently?

Tamás has recently worked in industries like Chemical, Retail, and Fashion.

Which business areas has Tamás worked in recently?

Tamás has recently worked in business areas like Information Technology and Product Development.

What is Tamás's education?

Tamás holds a Master in Information Technology from Technical University of Karlsruhe and a Master in Technical Informatics from Budapest University of Technology and Economics.

Does Tamás have any certificates?

Tamás has 1 certificate: Data Analyst Nanodegree.

What is the availability of Tamás?

Tamás is immediately available part-time for suitable projects.

What is the rate of Tamás?

Tamás's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.