Recommended expert

Jonas Walter

Frontend

Jonas Walter
Frankfurt, Germany

Experience

Jan 2025 - Present
1 year 1 month

Fullstack Developer

Soulven Agency

  • Working for customer and internal projects ranging from B2C, B2B applications
  • Development and maintenance of customer-facing and internal applications across B2C and B2B domains
  • Responsibility for technical direction, architectural decisions and code quality standards
  • Design and implementation of scalable application architectures, including modular frontend and service-oriented backend structures
  • Conceptual planning and technical execution of the agency website relaunch in Angular
  • Rapid prototyping and MVP development for B2B customer projects in the pharmaceutical sector with Vue.js
  • Creation of first MVPs for 3D rendering–based products, including real-time visualization and interactive experiences
  • Strong UX/UI expertise with a focus on gamification, user engagement and conversion-driven interfaces
  • Close collaboration with product management, design and stakeholders to translate business requirements into technical solutions
  • Agile software development using Scrum, including sprint planning, reviews and retrospectives, supported by Azure DevOps
  • Full-stack development using React, Angular, TypeScript, Vue.js, HTML5, CSS3/SCSS, C#, .NET, Node.js, RESTful APIs, Unity, Azure DevOps, Git and CI/CD pipelines
Jan 2024 - Dec 2024
1 year
Lorem ipsum dolor sit amet

Binary Impact GmbH

  • Crucial memory optimization for WebGL applications on iOS/Safari, addressing strict browser memory limits and improving stability and load times
  • Performance optimizations in video playback and audio synchronization, ensuring smooth multimedia experiences across browsers and devices
  • Rendering and memory usage optimizations, including asset management, draw-call reduction and runtime performance tuning
  • Definition and implementation of CI/CD pipelines in Azure DevOps, enabling automated builds, testing and deployments
  • Porting and optimization of VR/XR applications for Meta Quest devices, including performance tuning for standalone hardware
  • Cross-platform development with a focus on browser, mobile and XR constraints
  • Application development using React, Node.js, TypeScript and C# .NET, with a strong emphasis on performance, maintainability and scalability
  • Simulation software for a big German automotive company, initially started as a client project and then expanded into a game
  • General optimization of simulation behaviours and assistance for vehicle world navigation algorithm design
  • Working with AI solutions like state machines and behaviour trees
  • Design and implementation of a user-onboarding feature and application landing page
  • Agile development using Scrum, Azure DevOps, Jira and Confluence
  • Programming and simulation development using Unity and C#, with a strong focus on performance, AI logic and user experience
Jan 2023 - Dec 2024
2 years
Lorem ipsum dolor sit amet

KEYENCE Deutschland GmbH

  • Development of a web-based B2B office management solution, focused on desk and room booking workflows
  • Implementation of a modern web frontend using Vue.js, with an emphasis on usability, responsiveness and performance
  • Integration of RESTful APIs using Swagger/OpenAPI, ensuring clean data contracts and maintainable interfaces
  • Close collaboration with backend developers and product stakeholders to translate business requirements into functional UI components
  • Contribution to application architecture and frontend best practices, including component-based design
  • Agile software development using Scrum, supported by Azure DevOps, Jira and Confluence
  • Application development using Vue.js, TypeScript and Node.js, with initial hands-on experience in C# .NET within a full-stack environment
  • Full-stack development in a B2B shipment tracking solution, including web frontend development in Angular for shipment and RMA processes
  • MSSQL mirror database integration from legacy AS/400 systems
  • Entity Framework backend development (CRUD processes) and GraphQL API integration for fast customer data fetching
  • Barcode scanning and image taking feature implementation and AWS S3 integration for delivery picture storage
  • CI/CD pipeline definition in Azure DevOps and agile development using Scrum, Jira and Confluence
  • Application development using Angular, TypeScript, C# .NET, Entity Framework, Node.js, with experience in enterprise system integration and cloud-based storage solutions
Jan 2020 - Dec 2023
4 years
Lorem ipsum dolor sit amet

Verkehrsgesellschaft Frankfurt (VGF)

  • Development of a full-stack application within the Frankfurt MIND(+) project, contributing to data-driven urban and mobility solutions
  • Web frontend development using React, implementing data-intensive user interfaces for operational and analytical workflows
  • Design and implementation of ETL pipelines from productive systems into analytics platforms, leveraging Kafka and microservice-based architectures
  • Backend development using C# .NET and Entity Framework, including CRUD operations and service-level business logic
  • AWS S3 integration for scalable storage of train and mobility-related datasets
  • Collaboration within a structured project environment applying PRINCE2 fundamentals, ensuring clear roles, documentation and delivery milestones
  • Close cooperation with cross-functional teams across development, data and project management
Jan 2019 - Dec 2020
2 years

QA Testing Assistant

Prime Force Group Int. AG

  • Performing manual quality assurance testing for web-based software applications
  • Testing websites, features and UI components across different browsers and devices
  • Validating functional requirements, user flows and content workflows
  • Identifying, documenting and tracking bugs and inconsistencies using ticket systems such as Jira
  • Supporting regression testing before releases and deployments
  • Collaborating closely with developers and QA team members to ensure software quality and usability

Summary

I am a full stack developer specializing in C# .NET, React, Angular and TypeScript. I build scalable, user-centric web applications with a strong focus on clean architecture and maintainability.

Alongside React and Angular, I have also experience with Vue.js, C#, .NET, Node.js, SQL, and GraphQL. I regularly work on migration projects and ensure smooth transitions from legacy systems to modern solutions.

I am currently expanding my CI/CD and DevOps skills and enjoy solving real-world problems while continuously learning new technologies and delivering high-quality user experiences.

Skills

  • Frontend
  • React
  • Angular
  • Vue.js
  • Javascript (Es6+)
  • Typescript
  • Backend
  • C# .Net
  • Node.js
  • Sql
  • Graphql
  • Rest Apis
  • Entity Framework
  • Asp.net Core
  • Devops
  • Git
  • Ci/cd
  • Docker
  • 3d
  • Unity
  • Html5
  • Css3 / Scss
  • Azure Devops

Languages

German
Native
English
Advanced
Italian
Intermediate

Education

Oct 2018 - Jun 2020

Private Academy Frankfurt

Programmer · Frankfurt, Germany

Certifications & licenses

Certified Programmer

Certified Scrum Master

Need a freelancer? Find your match in seconds.
Try FRATCH GPT
More actions

Similar Freelancers

Discover other experts with similar qualifications and experience

Carlos Medina
Carlos Medina

Migration Zend Framework 2 / Laminas

View Profile
Ivan Greguric-ortolan
Ivan Greguric-ortolan

Technical Lead

View Profile
Werner Keil
Werner Keil

Test Coordinator, Designer and Engineer

View Profile
Marc Haid
Marc Haid

Senior Architect, Coach and Developer

View Profile
Kyu-wang Lee
Kyu-wang Lee

Software Architect & Lead Software Engineer

View Profile
Hüseyin Korkut
Hüseyin Korkut

Senior Full-Stack Engineer

View Profile
Marcel Meyer
Marcel Meyer

Cloud-Architect, Senior Solution Architect, Senior Software-Engineer

View Profile
Marie-josée Mache
Marie-josée Mache

Java Engineer / Developer

View Profile
Arne Hendricks
Arne Hendricks

Embedded Fullstack Developer

View Profile
Peter Großmann
Peter Großmann

Senior Backend Developer

View Profile
Fahrettin Kutyol
Fahrettin Kutyol

Senior Frontend Engineer

View Profile
Thomas Hoefkens
Thomas Hoefkens

Senior MLOps, DevOps Engineer

View Profile
Rainer Diekmann
Rainer Diekmann

Enterprise Architecture Management / Software Developer Backend

View Profile
Stefan Hess
Stefan Hess

Fullstack Development, Product Owner & Tech Lead

View Profile
Shamaila Mahmood
Shamaila Mahmood

Senior Software Architect

View Profile
Dimitri Simon
Dimitri Simon

Fullstack Developer, Integrator

View Profile
Florian Fladung
Florian Fladung

Senior Backend Developer

View Profile
Christian Hacker
Christian Hacker

Qualifications Profile

View Profile
Alexander Kapincev
Alexander Kapincev

Senior Fullstack Developer

View Profile
Prasad Tilloo
Prasad Tilloo

Solution Architect / Senior Manager – DTC E-Commerce Platform

View Profile
Jörg Trappschuh
Jörg Trappschuh

Database Expert and Software Developer

View Profile
Csaba Kéri
Csaba Kéri

ServiceNow Consultant

View Profile
Anton Klonov
Anton Klonov

Head of Technical Overall Integration NSC / Hadoop Cloud Development

View Profile
Martin Eisengardt
Martin Eisengardt

Software Developer

View Profile
Johannes Knörzer
Johannes Knörzer

Software Developer

View Profile
Andreas Grutz
Andreas Grutz

Senior Fullstack .NET (Core) & Angular Developer

View Profile
Jürgen Fey
Jürgen Fey

AR/VR/XR Architect

View Profile
Mathis Dudler
Mathis Dudler

Senior Web/Frontend Developer

View Profile
Kiriakos Krastillis
Kiriakos Krastillis

Tech Lead: API Experience Platform

View Profile
Niko Schmuck
Niko Schmuck

Developing Architect, Technical Lead "gridlytics"

View Profile