Jonas Walter - Frontend

Q: Where is Jonas based?

Jonas is based in Frankfurt, Germany .

Q: What languages does Jonas speak?

Jonas speaks the following languages: German (Native), English (Advanced), Italian (Intermediate) .

Q: How many years of experience does Jonas have?

Jonas has at least 7 years of experience. During this time, Jonas has worked in at least 2 different roles and for 5 different companies . The average length of individual experience is 1 year and 5 months . Note that Jonas may not have shared all experience and actually has more experience.

Q: What is Jonas's latest experience?

Jonas's most recent position is Fullstack Developer at Soulven Agency .

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

In recent years, Jonas has worked for Soulven Agency , Binary Impact GmbH , KEYENCE Deutschland GmbH , and Verkehrsgesellschaft Frankfurt (VGF) .

Q: Which industries is Jonas most experienced in?

Jonas is most experienced in industries like Information Technology (IT) , Transportation and Logistics , and Manufacturing . Jonas also has some experience in Pharmaceutical and Automotive .

Q: Which business areas is Jonas most experienced in?

Jonas is most experienced in business areas like Information Technology (IT) , Business Intelligence , and Project Management . Jonas also has some experience in Product Development and Quality Assurance (QA) .

Q: Which industries has Jonas worked in recently?

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

Q: Which business areas has Jonas worked in recently?

Jonas has recently worked in business areas like Information Technology (IT) , Business Intelligence , and Project Management .

Recommended expert

Frankfurt, Germany

Experience

Jan 2025 - Present

1 year 3 months

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

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

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

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

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 (4 years), Manufacturing (2 years), Pharmaceutical (1 year), and Automotive (1 year).

Information Technology

Transportation

Manufacturing

Pharmaceutical

Automotive

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 (6 years), Business Intelligence (4 years), Project Management (4 years), Product Development (3 years), and Quality Assurance (2 years).

Information Technology

Business Intelligence

Project Management

Product Development

Quality Assurance

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

Profile

Created

January 2026

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Frequently asked questions

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

Where is Jonas based?

Jonas is based in Frankfurt, Germany.

What languages does Jonas speak?

Jonas speaks the following languages: German (Native), English (Advanced), Italian (Intermediate).

How many years of experience does Jonas have?

Jonas has at least 7 years of experience. During this time, Jonas has worked in at least 2 different roles and for 5 different companies. The average length of individual experience is 1 year and 5 months. Note that Jonas may not have shared all experience and actually has more experience.

What roles would Jonas be best suited for?

Based on recent experience, Jonas would be well-suited for roles such as: Fullstack Developer, QA Testing Assistant.

What is Jonas's latest experience?

Jonas's most recent position is Fullstack Developer at Soulven Agency.

What companies has Jonas worked for in recent years?

In recent years, Jonas has worked for Soulven Agency, Binary Impact GmbH, KEYENCE Deutschland GmbH, and Verkehrsgesellschaft Frankfurt (VGF).

Which industries is Jonas most experienced in?

Jonas is most experienced in industries like Information Technology (IT), Transportation and Logistics, and Manufacturing. Jonas also has some experience in Pharmaceutical and Automotive.

Which business areas is Jonas most experienced in?

Jonas is most experienced in business areas like Information Technology (IT), Business Intelligence, and Project Management. Jonas also has some experience in Product Development and Quality Assurance (QA).

Which industries has Jonas worked in recently?

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

Which business areas has Jonas worked in recently?

Jonas has recently worked in business areas like Information Technology (IT), Business Intelligence, and Project Management.

What is Jonas's education?

Jonas attended Private Academy Frankfurt for Programmer.

Does Jonas have any certificates?

Jonas has 2 certificates. These include: Certified Programmer and Certified Scrum Master.

What is the availability of Jonas?

Jonas is immediately available full-time for suitable projects.

What is the rate of Jonas?

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