Recommended expert

Boris Solos

Senior Software Developer

Boris Solos
Ratingen, Germany

Experience

Dec 2022 - Dec 2024
2 years 1 month
Düsseldorf, Germany

Senior Software Developer

Advaneo GmbH

  • Developed backend for Dataspace
  • Technologies: IntelliJ IDEA, Java, Gradle, REST, EDC Connector, data analytics AI, Git/GitLab
Jul 2022 - Oct 2022
4 months
Cologne, Germany

Senior Software Developer

OBI Group Holding SE & Co. KGaA

  • Developed Kotlin backend for B2C civil construction elements and online garden and orchard design
  • Technologies: IntelliJ IDEA, Kotlin, Gradle, REST, Kubernetes, ArangoDB, Git/GitLab
Feb 2021 - Jun 2022
1 year 5 months
Neuss, Germany

Senior Software Developer

European EPC Competence Center GmbH

  • Developed Java/JEE B2B web application for international logistics and tracking of ware items and supply chains
  • Technologies: IntelliJ IDEA, Java 11, Spring Boot, REST, Docker, Git, Jira, PostgreSQL
May 2020 - Jan 2021
9 months
Düsseldorf, Germany

Senior Software Developer

Excellence AG

  • Developed LKV-NRW Java/JEE B2C web application for milk test orders for agriculture firms
  • Technologies: IntelliJ IDEA, Java 8–11, Spring Boot, REST/microservices, Docker, JOOQ, Kotlin
Apr 2018 - Mar 2020
2 years
Germany

Senior Software Developer

Brunel GmbH

  • RCI Banque (09/2019–03/2020) in Neuss: Java 9, IntelliJ, Git, Tomcat, Jira, Docker, Spring Boot, SOAP, REST, DB2

  • GETRAG Ford (06/2018–08/2019) in Cologne: JavaScript, Dojo, ARAS/AML, C#

  • Werk II (03/2018–05/2018) in Duisburg: Java 9, Eclipse, Git, GlassFish, Payara, Jira

Dec 2017 - Mar 2018
4 months
Mülheim, Germany

Senior Software Developer

Rhein-Ruhr-Informatik GmbH

  • Developed Java/JEE for O2 German homepage
  • Technologies: IntelliJ IDEA, Java 8, Angular, Tomcat, Hibernate, Slack
Mar 2016 - Oct 2017
1 year 8 months
Dortmund, Germany

Senior Software Developer

proLogistik GmbH + Co KG

  • Developed Java/JEE applications for warehouse management systems
  • Technologies: Eclipse, Java, Tomcat, Hibernate, Oracle

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (4 years), Transportation (3 years), Automotive (2 years), Banking and Finance (2 years), Retail (0.5 years), and Agriculture (0.5 years).

Information Technology
Transportation
Automotive
Banking and Finance
Retail
Agriculture

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (8.5 years), Product Development (2.5 years), Business Intelligence (2 years), and Supply Chain Management (1.5 years).

Information Technology
Product Development
Business Intelligence
Supply Chain Management

Summary

With my extensive experience as a Java full-stack developer specializing in Spring Boot, REST, microservices, GraphQL, and Docker, I am applying for the advertised position.

Furthermore, I have in-depth knowledge of PostgreSQL, Oracle, nested complex SQL/JQL queries, Git, CI/CD (GitLab, GitHub), Kotlin, Angular, Jira, and Confluence, along with IntelliJ. Among various middleware types, I gained experience with Camunda BPM at a bank.

As a graduate mathematician, I have a clear understanding of the complexity of algorithms, graph theory, simplex methods, logical formulas, geometric mappings, numerical methods, and related topics.

Over the past few years, I have gained valuable experience in various industries, particularly in the areas of logistics (goods flow control, warehouse management, international supply chains, goods transport control) and BTC data management. My work style is strongly influenced by teamwork in agile Scrum teams, working shoulder-to-shoulder with GUI and QA colleagues, where I was actively involved in both the development and testing and integration phases.

My main responsibilities included developing and implementing server-side applications with a focus on REST APIs and deploying them in Docker containers, creating SQL database tables with indexes, ensuring data integrity, and optimal data types. I also worked closely with front-end developers to coordinate requirements, define parameter formats, and optimize the logic of REST data structures. I successfully used Springdoc OpenAPI for documentation and direct testability (JUnit, Mockito) of the interfaces.

In my last position at the startup advaneo GmbH, I was heavily involved in the development of two middleware solutions, TDH and EDC. Both projects reached version 1.0 in January 2025 and were successfully presented to investors and customers.

TDH focused on processing CSV data from various technical sources. This data was then prepared for data analytics using Generative AI in Jupyter Notebooks. Although the AI component played a supporting role, I was able to gain valuable experience in data analysis and its integration into backend systems. EDH uses a variety of Java Security REST APIs from Keycloak/OAuth2 to keep me constantly busy.

Skills

  • Java 8 – 24
  • Spring / Spring Boot
  • Rest / Microservices
  • Graphql
  • Angular
  • Javascript
  • Typescript
  • Kotlin
  • Python
  • Hibernate
  • Junit
  • C / C++ / C#
  • Soap
  • Thymeleaf
  • Testng
  • Html 5
  • Css
  • Aras / Aml
  • Nosql Redis
  • Mongodb
  • Tomcat
  • Jboss / Wildfly
  • Intellij
  • Eclipse Rcp
  • Ant
  • Maven
  • Gradle
  • Jenkins
  • Ci/cd
  • Cvs
  • Svn
  • Git / Github / Gitlab
  • Scrum Development
  • Jira
  • Confluence
  • Docker
  • Oracle
  • Postgresql
  • Mysql
  • Camunda Bpm
  • Unix
  • Windows
  • Java / Jee
  • Sql
  • Pl/sql
  • Ansi C++
  • Node.js
  • Unix Shell Script
  • Jsf
  • Struts
  • Xml
  • Jpa / Hibernate
  • Spring / Spring Boot
  • Jdbc
  • Webservices / Rest
  • Eclipse
  • Tomcat
  • Bea Weblogic
  • Ibm Websphere
  • Maven
  • Intellij Idea

Languages

German
Native
English
Advanced

Education

Sep 1989 - Jun 1994

Rostov-on-Don State University

Diploma in Mathematics (completed) · Mathematics · Rostov-on-Don, Russian Federation

Profile

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Frequently asked questions

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

Where is Boris based?

Boris is based in Ratingen, Germany.

What languages does Boris speak?

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

How many years of experience does Boris have?

Boris has at least 8 years of experience. During this time, Boris has worked in at least 1 role and for 7 different companies. The average length of individual experience is 1 year and 2 months. Note that Boris may not have shared all experience and actually has more experience.

What roles would Boris be best suited for?

Based on recent experience, Boris would be well-suited for roles such as: Senior Software Developer.

What is Boris's latest experience?

Boris's most recent position is Senior Software Developer at Advaneo GmbH.

What companies has Boris worked for in recent years?

In recent years, Boris has worked for Advaneo GmbH, OBI Group Holding SE & Co. KGaA, and European EPC Competence Center GmbH.

Which industries is Boris most experienced in?

Boris is most experienced in industries like Information Technology (IT), Transportation and Logistics, and Automotive. Boris also has some experience in Banking and Finance, Agriculture, and Retail.

Which business areas is Boris most experienced in?

Boris is most experienced in business areas like Information Technology (IT), Product Development, and Business Intelligence. Boris also has some experience in Supply Chain Management.

Which industries has Boris worked in recently?

Boris has recently worked in industries like Information Technology (IT), Transportation and Logistics, and Retail.

Which business areas has Boris worked in recently?

Boris has recently worked in business areas like Information Technology (IT), Business Intelligence, and Supply Chain Management.

What is Boris's education?

Boris attended Rostov-on-Don State University for Mathematics.

What is the availability of Boris?

Boris is immediately available full-time for suitable projects.

What is the rate of Boris?

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

How to hire Boris?

To hire Boris, click the Meet button on the profile to request a meeting and discuss your project needs.

Average rates for similar positions

Rates are based on recent contracts and do not include FRATCH margin.

1200
900
600
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Market avg: 930-1090 €
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.