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Software Engineer, Analyst and Architect with more than two decades of experience in desktop, server and web solutions in such sectors as banking, railways, education, logistics, public services, private and non-profit. Specializing in system integration, UI/UX design, test automation, solution engineering, full stack development, and requirements engineering — with applied skills, technologies and approaches listed in the sidebar. Extensive international expertise with ample knowledge in a wide range of technology-oriented, scientific, business and social areas. Avid learner with consistency, commitment, style, scrupulousness, and excitement for reasonable challenge. Motivated to contribute with passion and reliability.…Software Engineer, Analyst and Architect with more than two decades of experience in desktop, server and web solutions in such sectors as banking, railways, education, logistics, public services, private and non-profit. Specializing in system integration, UI/UX design, test automation, solution engineering, full stack development, and requirements engineering — with applied skills, technologies and approaches listed in the sidebar. Extensive international expertise with ample knowledge in a wide range of technology-oriented, scientific, business and social areas. Avid learner with consistency, commitment, style, scrupulousness, and excitement for reasonable challenge. Motivated to contribute with passion and reliability.

Sergey Sirotkin

Full Stack Developer, Web Developer, UX Designer, +3

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Software Engineer, Analyst and Architect with more than two decades of experience in desktop, server and web solutions in such sectors as banking, railways, education, logistics, public services, private and non-profit. Specializing in system integration, UI/UX design, test automation, solution engineering, full stack development, and requirements engineering — with applied skills, technologies and approaches listed in the sidebar. Extensive international expertise with ample knowledge in a wide range of technology-oriented, scientific, business and social areas. Avid learner with consistency, commitment, style, scrupulousness, and excitement for reasonable challenge. Motivated to contribute with passion and reliability.…Software Engineer, Analyst and Architect with more than two decades of experience in desktop, server and web solutions in such sectors as banking, railways, education, logistics, public services, private and non-profit. Specializing in system integration, UI/UX design, test automation, solution engineering, full stack development, and requirements engineering — with applied skills, technologies and approaches listed in the sidebar. Extensive international expertise with ample knowledge in a wide range of technology-oriented, scientific, business and social areas. Avid learner with consistency, commitment, style, scrupulousness, and excitement for reasonable challenge. Motivated to contribute with passion and reliability.

Available to hire

Software Engineer, Analyst and Architect with more than two decades of experience in desktop, server and web solutions in such sectors as banking, railways, education, logistics, public services, private and non-profit.

Specializing in system integration, UI/UX design, test automation, solution engineering, full stack development, and requirements engineering — with applied skills, technologies and approaches listed in the sidebar.

Extensive international expertise with ample knowledge in a wide range of technology-oriented, scientific, business and social areas. Avid learner with consistency, commitment, style, scrupulousness, and excitement for reasonable challenge. Motivated to contribute with passion and reliability.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

German

Fluent

German

Fluent

English

Fluent

Russian

Fluent

Belarusian

Fluent

Italian

Beginner

French

Beginner

Work Experience

Founder / Owner / Tech Lead / Software Engineer at GIG.time

March 1, 2019 - Present

IT outsourcing/consulting: software development, system integration, requirements engineering, usability analysis. Projects involve Vaadin, Java, JavaScript, SQL, XML, HTML/CSS, REST; examples include a web-based railway path/loading planner, a dynamic quiz web app, private cloud solutions for SMEs, ATM cash-management workflow, automated PDF form processing, and railway schedule validation.

Senior Software Engineer at Pinnatec AG

August 1, 2023 - July 31, 2025

Agile full-stack development for STV-Contest (Switzerland’s nationwide sports-event platform); UI/UX enhancements and data processing; development of custom framework components.

Senior Software Developer at Bedag Solutions

June 1, 2020 - March 31, 2022

Contributed to a software bundle for Swiss real estate register management; redesign and implementation of interfaces for cross-domain electronic business transaction services (Java, Spring, Angular/TypeScript, SQL, XML, REST, SOAP, HTML/CSS, Docker/Kubernetes, Flyway).

Software Engineer / Architect / Analyst at Interconnective

December 1, 2007 - September 30, 2018

Software development consulting for corporate customers; internal projects in system integration, data processing and system administration.

Senior Advisory Solution Architect / Analyst at Diebold Nixdorf

September 1, 2016 - September 30, 2018

Concepts and features of a new Swiss ATM software bundle; remote ATM monitoring/management; protocol conversion layer between a legacy monitoring server and 3rd-party ATM monitoring clients.

Advisory Solution Architect / Analyst at Wincor Nixdorf

January 1, 2013 - August 31, 2016

Refactoring and technology lift of a Swiss ATM software bundle; front-end customer workflows; order generation for ATM cash management; enforcement of clean code and static analysis.

Advisory Software Engineer / Analyst at Wincor Nixdorf

January 1, 2008 - December 31, 2012

Feature development and bugfixing for a Swiss ATM software product family; front-end module improvements; data parsing from ATM journals; code refactoring and reviews.

Software Engineer at WMC IT Solutions

October 1, 2006 - September 30, 2007

Web applications and CMS/CRM modules; patient database; requirements specs and mockups for an online ad trade platform.

Freelance Web Developer at Self-employed

June 1, 2000 - Present

Website and web app development for non-profit and private sector; WordPress plugin/theme development.

Freelance Technical Translator at Self-employed

March 1, 1999 - Present

Translation of specifications, manuals and guides; localization and internationalization of UIs and logging/reporting in codebases.

Education

Graduate IT Engineer with focus on Enterprise Computing at University of Applied Sciences, Brugg/Windisch, Switzerland

October 1, 2002 - December 1, 2005

Master of Arts (M.A.) in International Economic Relations at Belarusian Commercial University of Management, Grodno, Belarus

October 1, 1993 - June 1, 1998

Qualifications

Visme Digital Design Foundations

January 1, 2025 - February 20, 2026

iSAQB Certified Professional for Software Architecture

January 1, 2021 - February 20, 2026

Object-oriented Design for Practitioners

January 1, 2009 - February 20, 2026

Cambridge Certificate of Proficiency in English

January 1, 2006 - February 20, 2026

Cambridge Certificate of Advanced English

January 1, 2004 - February 20, 2026

World YMCA's Training for Trainers

January 1, 2017 - February 20, 2026

Industry Experience

Software & Internet, Education, Financial Services, Transportation & Logistics, Government, Non-Profit Organization, Real Estate & Construction, Professional Services