Filip Marek

Senior Go Developer

Salary / Daily rate

Łódź, Poland

Freelance

Skills

GolangDockerPostgreSQL

Languages

English

About me

Intro

Go Developer with 9+ years in scalable microservices architecture and payment systems. Currently Senior Engineer at Worldline/Ingenico, replacing legacy platforms with dockerized Go applications for Europe's largest payment processor. Specialized in high-performance financial systems using Go, PostgreSQL, Kafka, and Docker orchestration.

Links

Work experience

Senior Software Engineer

Sii Poland

Jul 2021 - Present

5 years 4 months

Łódź, Poland

GO DEVELOPER at Worldline/Ingenico Project description & team size: • Working in one of the teams in the Financial Operations sector of the largest European player in payment services and the fourth largest player worldwide – 4 Developers/Technical Analysts, 2 Testers, 1 Product Owner. Tasks: • Replacing Ab Initio platform with scalable docker microservices with Go applications aboard. • Creating applications matching different types of reports generated in the payment transaction process. • Monitoring, analyzing and improving existing applications and processes. Technologies: • Go, PostgreSQL, Kafka, Git, Gitlab, Gitlab CI, Docker, Docker Swarm, Linux, Windows

IT Solution Architect / Programmer

Multiway Systems Sp. z o. o.

Jul 2019 - Jul 2021

2 years 1 month

Łódź, Poland

Project description & team size: • Working in a team of programmers on the design, creation from scratch end-to-end central system based on microservices architecture and used for reporting, accounting, monitoring, analysis, verification, aggregation of data from system and also external systems, receiving and processing data from automated vending machines. Tasks: • Design, creation and development of the central system. • Participation in discussions/ teleconferences with the client. • Cooperation with foreign teams in implementing and diagnosing the operation of the system. Technologies: • PHP, Javascript (Vue.js), PostgreSQL, Kong, MongoDB, Redis, Symfony, Git, Gitlab, Gitlab CI, Docker, Docker Swarm, VMWare ESX, Linux

Programmer

Grupa MERA

Jul 2017 - Jul 2019

2 years 1 month

Łódź, Poland

Project description & team size: • Working as part of a team of programmers to design, create, develop and improve a central system for monitoring, reporting, analyzing, receiving and processing data from ticket machines/ public transport ticket machines. Tasks: • Software development of the front-end application of the central system. • Creating new and improving existing reports (models and queries). • Collaborating with the team of programmers of ticket machine applications. • Analyzing and monitoring the performance of individual application modules. • Installing and rolling out the central systems to new customers and migrating data to the new platform. • Responding to input data errors and failures. • Optimizing the performance of existing mechanisms. Technologies: • PHP, Javascript (jQuery), PostgreSQL, Symfony, Git, Gitlab, Docker, Linux

PHP Programmer

Media4U

May 2015 - Jul 2017

2 years 3 months

Łódź, Poland

Project description & team size: • Working in a team of programmers on the expansion, creation and improvement of functionalities for the administration panel of the e-commerce platform of one of the leading online clothing stores in Poland. Tasks: • Develop administration panel software in accordance with agile Scrum methodology. • Taking care of quality and readability of implemented functionalities, optimizing and improving already existing mechanisms. • Developing emergency procedures and reacting in case of their occurrence. • Creating scripts to automate processes such as synchronizing databases. • Creating templates and sending periodic/ one-time emails to customers, data exchange with external partners. Technologies: • PHP, Javascript (jQuery), PostgreSQL, CodeIgniter Framework, SVN, XML, Linux

Web Application Programmer

Grupa B4 Sp. z. o. o.

Apr 2015 - May 2015

2 months

Płock, Poland

Tasks: • Creating new modules for daughter company application to control production process (costing, production orders, stock order, production flow). Technologies: • PHP, Firebird, Linux, JavaScript, Ubuntu, HTML, CSS, jQuery

Web Developer

Staircase

May 2014 - Jul 2014

3 months

Płock, Poland

Tasks: • Help with JS scripting. • Develop sites according to clients need. • Wordpress plugin development. • Creating application to support call center with client questions posted on social media sites. Technologies: • PHP, MySQL, Linux, JavaScript, Ubuntu, HTML, CSS, WordPress, Zend Framework, jQuery

Web Developer

Promesa budownictwo

Jul 2013 - Mar 2014

9 months

Płock, Poland

Tasks: • Creating a system for the company from scratch, which helped in: control of employees and working hours, time management, scheduling tasks for managers, invoicing, control of revenues and expenses for individual orders. Technologies: • PHP, PostgreSQL, JavaScript, HTML, CSS, Zend Framework, jQuery

Web Developer

Staircase

Apr 2013 - May 2013

2 months

Płock, Poland

Tasks: • Introduction to work as a programmer. • Assistance with simple tasks. • Getting familiar with work of web development. • Working in a team of programmers. Technologies: • PHP, MySQL, JavaScript, HTML, CSS, WordPress, jQuery


Education

Państwowa Wyższa Szkoła Zawodowa w Płocku

Bachelor's degree

2011 - 2014

3 years 1 month

The best place to find your next move

© 2026. All Rights Reserved.