Wadim Lupejcenko-Software Engineer & Consultant
Check rate
Experience
Software Engineer & Consultant
Abat+ GmbH | Daimler Trucks AG
New development of the vehicle planning and delivery system (FAPS)
As part of the modernization of a central backend application, the existing monolithic COBOL-based system was replaced by a service-oriented architecture with Spring Boot. The goal of the project is to make the digital mapping of vehicle planning and delivery future-proof and scalable.
Work on the technical architecture and interface design
Development of a service based on Spring Boot for migrating existing data into a new data model
Development of REST APIs and the related service layer
Development of middleware for integrating the new backend into an existing client
Creation of unit and end-to-end tests
Adaptation of build pipelines
Developer training for customer staff (Java, Azure DevOps, general support)
Support for testers and other project members
Upgrade of the Spring Boot version (& Hibernate)
Creation of documentation
Java 8 and 17, Spring Boot, Spring JPA, Hibernate, Optimistic Locking (entity versioning), JUnit, Cucumber, PostgreSQL, Azure Cloud, Microservices, Azure Storage, Azure DevOps, Azure Kubernetes Service, RESTful web services, JSON, Scrum, Confluence, ArchUnit
Software Engineer
World-leading publisher of GLN numbers
Development of a system landscape based on CQRS for issuing GLN numbers. The goal of the project was to reimplement identity assignment in a modern application architecture, and to modernize the IT infrastructure that had grown over many years by removing technical debt and moving it to a future-proof base with the help of Azure Cloud.
Development of a microservice for form requests. To give users the ability to manage different data on their own, an application was to be created that provides the required forms via a REST interface. In addition, the use of the application had to be secured by authentication.
Implementation of microservices with NestJS (TypeScript, NodeJS)
Development of REST & gRPC APIs
Development of Azure Functions (JavaScript/TypeScript, NodeJS)
Containerization and orchestration with Kubernetes and Helm
Implementation of CI/CD processes in Azure DevOps
Adaptation of the frontend (VueJS, TypeScript, NodeJS)
Maintenance / support
Implementation of the microservice with NestJS (TypeScript, NodeJS)
Development of REST APIs
Containerization with Docker
Implementation of CI/CD processes in Azure DevOps
Adaptation of the Azure Logic App
Deployment and configuration in Azure App Services for Docker
TypeScript, Azure Cloud, Microservices, Azure Functions, Azure CosmosDB, Azure Service Bus, Azure Kubernetes Service, gRPC, ProtoBuff, Helm, Azure DevOps, GitLab, VueJS, RESTful web services, NestJS, mTLS, NodeJS, NPM, JSON, Scrum, Jira, Confluence, Azure App Services, JWT, Docker, Azure Logic App
Fullstack Developer
Federal authority
Implementation of a SaaS solution for sending push notifications to mobile devices. The goal of the project was to build a highly scalable system for sending push notifications to iOS and Android devices from scratch and to prove the technical feasibility. Development followed the "API-First" approach.
Implementation of microservices with Spring Boot 2 (Java 11 & 17)
Implementation of REST APIs
Development of unit tests
Containerization and orchestration with Kubernetes and Helm
Creation of a frontend for managing devices and sending messages (Thymeleaf)
Support in the development of the demo app (React Native)
Azure Cloud, Microservices, RabbitMQ, Thymeleaf, Jenkins, Azure Kubernetes Services, Helm, Spring Boot 2, Java 11 & 17, PostgreSQL, OpenAPI, Mockito, JUnit, Maven, React Native, Expo, JSON, Jira, Confluence, Scrum
Fullstack Developer
City of Oberhausen
Extension of the open-source software "SORMAS" for generating lab reports. The fire department of the city of Oberhausen planned to carry out Covid-19 tests at supply facilities. For this, the software "SORMAS" was to be extended with the feature "generation of a lab order". To make processing more efficient, new bulk processing features were also to be provided.
Development of a library for generating lab orders (Java 8)
Adaptation of the backend (Java 8)
Adaptation of the database schema
Adaptation of the frontend (Vaadin 8)
Java 8, Vaadin 8, Maven, Payara Server, PostgreSQL, Confluence, OpenSource
Backend Developer
Multi-channel distance retailer
Implementation of middleware for data exchange. For the development of a smartphone app, middleware for exchanging data between the frontend and the SAP Hybris webshop was designed and developed. Development followed the "API-First" approach.
Implementation of microservices with Spring Boot 2 (Java 11)
Development of unit tests
Containerization of microservices
Microservices, Docker, Spring Boot 2, Java 11, OpenAPI, Mockito, JUnit, Maven, Jira, Confluence
IT-Specialist
Aleri Solutions GmbH
- Design, development, and implementation of custom software solutions for clients from different industries using Java, TypeScript, and C#
- Working with clients and teams to analyze requirements and create technical specifications
- Optimization and further development of existing software solutions
- Implementation of APIs and integration of third-party services
- Creation of extensive tests to ensure software quality
IT Specialist for Application Development
Raynet GmbH
- Software development with C# and WPF
- Manual and automated software testing
- Requirements analysis
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Transportation, Automotive, Government and Administration, and Retail.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, and Quality Assurance.
Summary
For more than five years, I have been designing, implementing, testing, and maintaining software systems and applications for a wide range of platforms. My focus is on development with Java, C#, and TypeScript. In addition, I work confidently with agile methods like Scrum and Kanban. My projects are known for top quality, reliability, and performance.
... looking for a project
- as a fullstack developer
- with a focus on backend development and DevOps
- full-time, as a freelancer
Skills
- Java (> 7 Years)
- C# (> 3 Years)
- Typescript (> 3 Years)
- Javascript (> 5 Years)
- Go (< 1 Year)
- Html (> 5 Years)
- Css/Scss (> 3 Years)
- Angular (< 1 Year)
- React (~ 1 Year)
- Vue.Js (~ 1 Year)
- Spring / Spring Boot (> 7 Years)
- Nest.Js (> 2 Years)
- Node.Js (> 3 Years)
- .Net / .Net Core (~ 3 Years)
- Mysql (~ 3 Years)
- Postgresql (~ 3.5 Years)
- Cosmos Db (> 1 Year)
- Jpa & Spring Data (> 2 Years)
- Liquibase (~ 1 Year)
- Azure Service Bus (> 2 Years)
- Azure Logic Apps (> 2 Years)
- Azure Kubernetes Service (> 3 Years)
- Azure Key Vault (~ 2 Years)
- Azure Function Apps (< 2 Years)
- Azure Storage (< 2 Years)
- Docker / Docker Compose (> 5 Years)
- Kubernetes (> 5 Years)
- Helm (> 2 Years)
- Gitlab (> 3 Years)
- Azure Devops (> 2 Years)
- Junit (~ 4.5 Years)
- Jest (> 2 Years)
- Cucumber (~ 1 Year)
- Selenium (~ 1 Year)
- Unit Tests & E2e Tests (~ 1 Year)
- Mockito & Moq (~ 4.5 Years)
- Backend Development (> 5 Years)
- Frontend Development (> 3 Years)
- Automated Testing Of Backend And Frontend Applications (> 5 Years)
- Devops (> 3 Years)
- Azure Cloud (> 2 Years)
Languages
Education
Raynet GmbH
IT Specialist for Application Development · Paderborn, Germany
Statistics
Experience
Global experience
Expertise
Profile
Frequently asked questions
Have questions? Find more information here.
Wadim is based in Paderborn, Germany and prefers 100% remote projects.
Wadim speaks the following languages: German (Native), Russian (Advanced), English (Intermediate).
Wadim has at least 11 years of experience. During this time, Wadim has worked in at least 6 different roles and for 7 different companies. The average length of individual experience is 2 years and 6 months. Note that Wadim may not have shared all experience and actually has more experience.
Based on recent experience, Wadim would be well-suited for roles such as: Software Engineer & Consultant, Software Engineer, Fullstack Developer.
Wadim's most recent position is Software Engineer & Consultant at Abat+ GmbH | Daimler Trucks AG.
In recent years, Wadim has worked for Abat+ GmbH | Daimler Trucks AG, World-leading publisher of GLN numbers, Federal authority, City of Oberhausen, and Multi-channel distance retailer.
Wadim is most experienced in industries like Information Technology, Transportation, and Government and Administration. Wadim also has some experience in Retail and Automotive.
Wadim is most experienced in business areas like Information Technology, Product Development, and Quality Assurance.
Wadim has recently worked in industries like Information Technology, Transportation, and Government and Administration.
Wadim has recently worked in business areas like Information Technology, Product Development, and Quality Assurance.
Wadim attended Raynet GmbH.
The availability of Wadim needs to be confirmed.
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Average rates for similar positions
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The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 6 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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