Alexander Vasiliev - Software Architect / Software Engineer / Tech Lead

Q: Where is Alexander based?

Alexander is based in Cologne, Germany and prefers 100% remote projects.

Q: What languages does Alexander speak?

Alexander speaks the following languages: Russian (Native), German (Advanced), English (Advanced) .

Q: How many years of experience does Alexander have?

Alexander has at least 24 years of experience. During this time, Alexander has worked in at least 8 different roles and for 11 different companies . The average length of individual experience is 2 years and 10 months . Note that Alexander may not have shared all experience and actually has more experience.

Q: What is Alexander's latest experience?

Alexander's most recent position is Senior DevOps / Platform Engineer at Kaufland e-commerce / real.digital (ex hitmeister.de) .

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

In recent years, Alexander has worked for Kaufland e-commerce / real.digital (ex hitmeister.de) .

Q: Which industries is Alexander most experienced in?

Alexander is most experienced in industries like Retail , Information Technology , and Tourism . Alexander also has some experience in Media and Entertainment , Telecommunication , and Transportation .

Q: Which business areas is Alexander most experienced in?

Alexander is most experienced in business areas like Information Technology , Operations , and Product Development . Alexander also has some experience in Business Intelligence , Quality Assurance , and Logistics .

Q: Which industries has Alexander worked in recently?

Alexander has recently worked in industries like Retail .

Q: Which business areas has Alexander worked in recently?

Alexander has recently worked in business areas like Information Technology and Operations .

Recommended expert

Cologne, Germany

Experience

Apr 2016 - Feb 2026

9 years 11 months

Hybrid

Senior DevOps / Platform Engineer

Kaufland e-commerce / real.digital (ex hitmeister.de)

Evolved the platform from bare-metal infrastructure with a monolithic PHP application to a hybrid Google Cloud architecture with Go microservices on Kubernetes
Managed and scaled a production infrastructure with 300+ VMs and dozens of clusters, including MySQL, PostgreSQL, MongoDB, RabbitMQ, Redis and Elasticsearch clusters
Designed architecture, deployment, monitoring, performance analysis, and upgrades for all platform services using Terraform and Ansible
Migrated observability systems from ELK and Prometheus to Datadog, managed with Terraform
Introduced Jenkins CI/CD with SonarQube integration and automated tests to speed up feedback cycles
Containerized the testing environment and implemented GitLab CI pipelines for Docker image builds, static code analysis, and infrastructure tests
Performed zero-downtime migrations of MySQL and MongoDB clusters to Google Cloud
Developed reusable Ansible roles for database clusters and automated data obfuscation for staging environments
Decomposed monolithic databases and migrated to microservice architectures
Built tools to detect and optimize slow queries in MySQL and MongoDB
Conducted online schema migrations with pt-online-schema-change without downtime windows
Developed internal Go applications for batch queries, GitLab-Jira integration, and MongoDB backup recovery
Technologies: Debian, Ubuntu, Alpine, Go, Bash, Python, PHP, SQL, GitLab CI, Jenkins, Drone CI, MySQL, MongoDB, PostgreSQL, Redis, Elasticsearch, RabbitMQ, Kafka, Docker, Kubernetes, Nomad, Ansible, Terraform, Grafana, ELK, Prometheus, Datadog, Nagios, Zabbix, Nginx, HAProxy, Vault, Helm, SonarQube, Filebeat, Auditbeat, Google Cloud, AWS

Sep 2012 - Jan 2015

2 years 5 months

Software Engineer / Consultant

HRS

Maintained and enhanced enterprise web service APIs for the travel industry
Onboarded new clients and integrated additional rate providers (Amadeus Hotel API, Yandex Travel Partner API)
Developed end-to-end integration tests and refactored existing APIs to improve reliability and performance
Applied clean code principles, automated tests, and CI practices
Technologies: Java, J2SE, JEE 5/6, Spring, Hibernate, Groovy, JBoss, MySQL, DB2, Elasticsearch, Maven, Ant, JUnit, PHPUnit, Git, CI/CD, Scrum

Mar 2012 - Sep 2012

7 months

Software Engineer / Architect

Hitmeister GmbH

Designed and developed a product data management system for an e-commerce platform
Automated product data import, normalization, and categorization to improve data quality
Handled system and database architecture, backend development, unit and integration testing
Technologies: PHP 5, MySQL, MongoDB, Memcached, SOA, Zend Framework, JSON, PHPUnit

Dec 2010 - Mar 2012

1 year 4 months

Software Engineer / 3rd-Level Support

Deutsche Post AG

Developed a highly secure De-Mail web portal with user management and web service APIs
Operated and supported production systems in 3rd-level support
Handled backend and frontend development, integration tests, and unit tests
Technologies: Java, JEE5, Spring, Hibernate, JBoss, Oracle 10g, PHP, Groovy, Maven, Tomcat, Linux, CI, Scrum

Dec 2009 - Dec 2010

1 year 1 month

Software Engineer / Software Architect

ontopica GmbH

Reconceived and enhanced a web platform for online participation and communication
Integrated Solr/Lucene search functionality
Designed architecture and database, developed backend and frontend, maintained and extended the platform
Technologies: Java, JEE6, Spring, MySQL, Glassfish, Solr, Lucene, JavaScript, HTML, CSS, Ant

May 2009 - Aug 2009

4 months

Software Engineer

Fraunhofer Institut IAIS

Developed a web-based administration interface for a similarity search application
Implemented configurable search and analysis functions
Technologies: Java, JavaEE, Spring, Hibernate, MySQL, Tapestry 5, Maven, Tomcat

Oct 2008 - Apr 2009

7 months

Software Engineer

Fraunhofer Institut IAIS

Developed a multithreaded web crawler with Lucene indexing and an admin interface
Performed data migration and designed a database optimized for performance
Technologies: Java, Spring, JSP, Lucene, MySQL, H2, Maven, Tomcat

Aug 2007 - Feb 2009

1 year 7 months

Software Engineer

Hitmeister GmbH

Developed a scalable e-commerce platform with product data import and payment and billing systems
Worked on high-load and scalability concepts
Technologies: PHP, MySQL, JavaScript, XML, Zend Framework, SOA, Solr, Memcached

Jan 2006 - Jul 2006

7 months

Software Engineer

Storm-Express GmbH

Developed a logistics and delivery management system to handle the parcel delivery process with mobile scanner apps
Technologies: PHP, MySQL, JavaScript, C#, Linux

Mar 2005 - Jul 2007

2 years 5 months

Software Engineer

Hitflip Media Trading GmbH

Developed an online exchange platform for media products with Amazon data import and matching algorithms
Technologies: PHP, MySQL, XML, JavaScript, Memcached

Mar 2004 - Feb 2005

1 year

Software Developer

pixelhouse GmbH

Development of an advertising CMS with statistical analysis and user tracking for chefkoch.de
Technologies: PHP, MySQL, JavaScript, Analytics

Dec 2001 - Nov 2003

2 years

Software Developer

Deutsche Telekom AG (brainbits GmbH)

Development of web-based administration tools for advertising products with versioning and publishing workflows
Technologies: Web development, workflow management

Jan 2000 - Dec 2001

2 years

Junior Software Developer

T-Systems / debis Systemhaus

Development of internal web applications for document and user management

Industry Experience

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

Experienced in Retail, Information Technology, Tourism, Media and Entertainment, Transportation, and Telecommunication.

Retail

Information Technology

Tourism

Media and Entertainment

Transportation

Telecommunication

Business Area Experience

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

Experienced in Information Technology, Operations, Product Development, Business Intelligence, Quality Assurance, and Logistics.

Information Technology

Operations

Product Development

Business Intelligence

Quality Assurance

Logistics

Summary

Experienced Platform/DevOps Engineer and Software Engineer (Golang, Python) with over 25 years of professional experience in developing, operating and scaling web platforms and enterprise systems.

Extensive hands-on experience in backend development, especially building distributed, high-performance, fault-tolerant systems as well as internal platform tools.

Focus areas include platform engineering, cloud infrastructures, CI/CD automation, reliable operation of highly available production systems. Backend development, design of distributed and concurrent systems, API design (REST, gRPC), development of internal platform and automation tools, asynchronous and message-driven architectures

Skills

Structured And Analytical Working Style
High Sense Of Responsibility And Reliability
Quick Ramp-up In Unfamiliar Systems
Hands-on Mentality
Self-management
Team Player With Clear Communication
Continuous Willingness To Learn

Languages

Russian

Native

German

Advanced

English

Advanced

Education

University of Bonn

Bachelor · Computer Science · Bonn, Germany

Statistics

Experience

Total positions 13

Experience in Retail 12 y

Avg length 1 y 11 m

Longest experience 9 y 10 m

Expertise

Recent roles Senior DevOps / Platform Engineer, Software Engineer / Consultant, Software Engineer / Architect

Main industries Retail, Information Technology, Tourism

Main business areas Information Technology, Operations, Product Development

Qualifications

Highest degree Bachelor

Profile

Created

January 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Alexander based?

Alexander is based in Cologne, Germany and prefers 100% remote projects.

What languages does Alexander speak?

Alexander speaks the following languages: Russian (Native), German (Advanced), English (Advanced).

How many years of experience does Alexander have?

Alexander has at least 24 years of experience. During this time, Alexander has worked in at least 8 different roles and for 11 different companies. The average length of individual experience is 2 years and 10 months. Note that Alexander may not have shared all experience and actually has more experience.

What roles would Alexander be best suited for?

Based on recent experience, Alexander would be well-suited for roles such as: Senior DevOps / Platform Engineer, Software Engineer / Consultant, Software Engineer / Architect.

What is Alexander's latest experience?

Alexander's most recent position is Senior DevOps / Platform Engineer at Kaufland e-commerce / real.digital (ex hitmeister.de).

What companies has Alexander worked for in recent years?

In recent years, Alexander has worked for Kaufland e-commerce / real.digital (ex hitmeister.de).

Which industries is Alexander most experienced in?

Alexander is most experienced in industries like Retail, Information Technology, and Tourism. Alexander also has some experience in Media and Entertainment, Telecommunication, and Transportation.

Which business areas is Alexander most experienced in?

Alexander is most experienced in business areas like Information Technology, Operations, and Product Development. Alexander also has some experience in Business Intelligence, Quality Assurance, and Logistics.

Which industries has Alexander worked in recently?

Alexander has recently worked in industries like Retail.

Which business areas has Alexander worked in recently?

Alexander has recently worked in business areas like Information Technology and Operations.

What is Alexander's education?

Alexander holds a Bachelor in Computer Science from University of Bonn.

What is the availability of Alexander?

Alexander is immediately available for suitable projects.

What is the rate of Alexander?

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