Wadim L.-Fullstack Software Developer / Software Engineer
Check rate
Experience
Fullstack Developer
dripwear.app
Development of an iOS app for virtual try-on and outfit suggestions
The goal of the project is to develop a mobile application for personalized, photorealistic outfit suggestions. Users should be able to upload their own photos, try on clothes virtually, and find products that can be bought directly in the generated suggestions.
- Planning and implementation of the onboarding and photo upload in the iOS app
- Development of the mobile application with Expo and React Native
- Implementation of a Hono/Node.js backend for user, product, and generation processes
- Building an asynchronous processing pipeline with BullMQ and Redis
- Connection of PostgreSQL/pgvector and S3 for product, image, and generation data
- Integration of Gemini and OpenAI for outfit generation and image processing
- Implementation of a credit system and integration of RevenueCat
- Integration of Stripe Connect and affiliate product feeds for products that can be bought directly
Label: TypeScript, React Native, Expo, Hono, Node.js, PostgreSQL/pgvector, BullMQ, Redis, S3, Gemini, OpenAI, RevenueCat, Stripe Connect, Docker
Fullstack Developer
contentmate.eu
Development of a multi-tenant platform for social media management
The goal of the project is to develop a multi-tenant SaaS platform for planning, publishing, and analyzing social media content. In addition, it should support collaborative handling of messages and comments through central inbox and team features.
- Planning of post scheduling, central inbox, analytics features, and team workspaces
- Development of the frontend with React, Vite, and TypeScript
- Implementation of multiple backend services with NestJS and a shared NPM data model
- Building the data model with PostgreSQL, TypeORM, Redis, and Bull
- Integration of the Meta Graph API and TikTok Open API for publishing and inbox features
- Connection of Stripe and S3 for billing, files, and platform data
- Setup of automated deployments with Docker, GitHub Actions, Helm/k3s, and Terraform
Label: TypeScript, React, Vite, NestJS, PostgreSQL, TypeORM, Redis, Bull, Docker, GitHub Actions, Helm/k3s, Terraform, Stripe, S3, Meta Graph API, TikTok Open API
Software Engineer & Consultant
Wadim Lupejcenko
Software Engineer
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 with a service-oriented architecture based on 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 the 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
- Adjustment of the build pipelines
- Developer training for the customer's employees (Java, Azure DevOps, general support)
- Support for testers and other project participants
- Upgrade of the Spring Boot version (& Hibernate)
- Creation of documentation
Label: 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 Webservices, JSON, Scrum, Confluence, ArchUnit
Software Engineer
Weltweit führender Herausgeber von GLN-Nummern
Development of a microservice for form requests
To give users the option to manage different data on their own, an application had to be created that provides the required forms via a REST interface. In addition, use of the application had to be secured through authentication
- Implementation of the microservice with NestJS (TypeScript, NodeJS)
- Development of REST APIs
- Containerization with Docker
- Implementation of the CI/CD processes in Azure DevOps
- Adjustment of the Azure Logic App
- Deployment and configuration in Azure App Services for Docker
Label: Azure Cloud, Azure DevOps, Microservices, Azure Service Bus, Azure Kubernetes Service, Azure App Services, TypeScript, Helm, RESTful Webservices, NestJS, JWT, NodeJS, NPM, JSON, Jira, Confluence
Software Engineer
Globally 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, as well as to modernize the IT infrastructure that had grown over many years by removing technical legacy and moving it to a future-proof foundation with the help of Azure Cloud
- 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
Label: TypeScript, Azure Cloud, Microservices, Azure Functions, Azure CosmosDB, Azure Service Bus, Azure Kubernetes Service, gRPC, ProtoBuff, Helm, Azure DevOps, GitLab, VueJS, RESTful Webservices, NestJS, mTLS, NodeJS, NPM, JSON, Scrum, Jira, Confluence
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 its technical feasibility. Development was done using 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)
Label: 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 certificates
The fire department of the city of Oberhausen planned to carry out Covid-19 tests at care 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)
Label: Java 8, Vaadin 8, Maven, Payara Server, PostgreSQL, Confluence, OpenSource
Backend Developer
Multichannel distance retailer
Implementation of a middleware for data exchange
For the development of a smartphone app, a middleware for data exchange between the frontend and the SAP Hybris webshop was to be designed and developed. Development was done using the "API-First" approach.
- Implementation of microservices with Spring Boot 2 (Java 11)
- Development of unit tests
- Containerization of microservices
Label: 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#
- Collaboration 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
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Retail, Transportation, Manufacturing, Automotive, and Government and Administration.
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 nine 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 such as Scrum and Kanban. My projects stand for top quality, reliability, and performance.
Skills
Programming Languages
Java
Typescript
C#
Javascript
Go
Web Technologies
Html
Css/Scss
Angular
React
Vue.Js
Frameworks
Spring (Boot)
Node.Js
Nest.Js
.Net/.Net Core
Databases
Mysql
Postgresql
Cosmos Db
Jpa & Spring Data
Liquibase
Azure Cloud
Service Bus
Logic Apps
Key Vault
Kubernetes Service
Function Apps
Devops
Storage
Ci/Cd
Gitlab
Docker/Docker Compose
Kubernetes
Helm
Testing
Junit
Jest
Cucumber
Selenium
Mockito & Moq
Unit Tests & E2e Tests
Languages
Education
Raynet GmbH
Specialist in IT for Application Development · 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 can operate in on-site, hybrid, and remote work models.
Wadim speaks the following languages: German (Native), Russian (Native), English (Advanced).
Wadim has at least 9 years of experience. During this time, Wadim has worked in at least 5 different roles and for 10 different companies. The average length of individual experience is 1 year and 11 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: Fullstack Developer, Software Engineer & Consultant, Software Engineer.
Wadim's most recent position is Fullstack Developer at dripwear.app.
In recent years, Wadim has worked for dripwear.app, contentmate.eu, Wadim Lupejcenko, abat+ GmbH | Daimler Trucks AG, and Weltweit führender Herausgeber von GLN-Nummern.
Wadim is most experienced in industries like Information Technology, Retail, and Transportation. Wadim also has some experience in Manufacturing, Government and Administration, 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, Retail, and Transportation.
Wadim has recently worked in business areas like Information Technology, Product Development, and Quality Assurance.
Wadim attended Raynet GmbH for Application Development.
Wadim is immediately available full-time for suitable projects.
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Average rates for similar positions
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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 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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