CTO at digital35

Lukas Volgger

CTO & Software Engineer

I build scalable backend systems with .NET and, as CTO, own the platform at digital35 GmbH.

Portrait of Lukas Volgger — **Lukas Volgger**Austria

About me

Clear structure, fast systems and code that stays maintainable for years.

I am a 33-year-old German-speaking CTO and Software Engineer based in Austria with a strong focus on .NET and backend architecture.

My journey into software development began through contributing to an open-source SQL project out of personal interest. What started as curiosity evolved into a clear professional direction: building structured, maintainable, and high-performance backend systems. In 2021, I formally transitioned into software engineering and completed a project-based training program, laying the foundation for my professional career.

With 4.5 years of experience in software development, I took over as CTO of digital35 GmbH in August 2026 — a platform I had already been shaping as a backend developer since 2023. The role is deliberately hands-on: I design and implement backend systems using .NET 8–10, ASP.NET Core, Entity Framework, and PostgreSQL, define architectural decisions, establish development standards, organize planning processes, and conduct pull request reviews to ensure long-term technical quality.

Beyond application logic, I take ownership of infrastructure and deployment workflows using Docker, GitHub Actions, and cloud environments such as DigitalOcean, Azure, and IONOS.

One of my core strengths lies in refactoring legacy systems and improving performance. I am particularly strong at transforming unstructured or inefficient codebases into clean, well-architected solutions. My working style is structured, detail-oriented, and focused on sustainable engineering rather than short-term fixes.

Outside of my professional work, I continue to deepen my technical expertise through side projects and experimentation, including game development and the integration of modern AI tools into development workflows.

Professional experience: 4.5 years
Backend focus: .NET
digital35 GmbH: CTO

Backend

C#
.NET
Java
Node.js
PostgreSQL
SQL
REST-API

Cloud & DevOps

DigitalOcean
AWS
Microsoft Azure
Docker
Git
Grafana
Sentry

Frontend & ways of working

TypeScript
JavaScript
Angular
Vue
HTML5
CSS3
SCRUM

Experience

Work and project experience

Client projects are listed as stations of their own, because that is where the experience was gained: from the first full-stack project to responsibility as CTO.

digital35 GmbH
CTO & Software Engineer
08/2026 – Present
Permanent position, continuing the platform previously built as a client project via JSE GmbH
Overall technical responsibility for a cloud-based platform, combining technology strategy and engineering leadership with hands-on backend development.
Responsibilities
- Overall technical responsibility as CTO, including technology strategy and long-term architectural direction
- Owner of the platform architecture and of all cross-cutting technical decisions
- Hands-on backend development with .NET and ASP.NET Core
- Definition of engineering standards, development processes and planning routines
- Technical evaluation and selection of tooling, third-party services and integration partners
- Ownership of multi-cloud infrastructure, containerized deployments and CI/CD pipelines
- Responsibility for monitoring, observability and operational reliability
- Technical mentoring, pull request reviews and knowledge sharing within the development team
- .NET
- ASP.NET Core
- Entity Framework
- PostgreSQL
- Docker
- Nginx
- GitHub Actions
- DigitalOcean
- Microsoft Azure
- IONOS Cloud
- Application Insights
- Grafana
digital35 GmbH
Backend Developer
08/2023 – 07/2026
Client project via JSE GmbH
Backend architecture and development for a cloud-based platform with external system integrations and infrastructure ownership.
Responsibilities
- Backend development with responsibility for architecture and technical decision-making
- Designed and implemented RESTful APIs using .NET and ASP.NET Core
- Implemented data access and domain logic using Entity Framework and relational databases
- Integrated multiple third-party APIs including financial and telematics service providers
- Owned and maintained multi-cloud infrastructure environments
- Designed and maintained containerized deployments
- Implemented and maintained CI/CD pipelines
- Established monitoring and observability standards
- Designed centralized logging and performance monitoring strategies
- .NET
- ASP.NET Core
- Entity Framework
- PostgreSQL
- Docker
- Nginx
- GitHub Actions
- DigitalOcean
- Microsoft Azure
- IONOS Cloud
- Application Insights
- Grafana
EASYDAY GmbH
Full-Stack Developer
05/2023 – 08/2023
Client project via JSE GmbH
Development of web-based video solutions and real-time communication features.
Responsibilities
- Developed a cross-platform web-based video editor using React and JavaScript with client-side media processing
- Enhanced and maintained a standalone video meeting feature based on WebRTC technologies
- Optimized real-time data transmission and backend communication for streaming services
- Designed and implemented UX/UI components using modern frontend frameworks
- TypeScript
- JavaScript
- HTML
- CSS
- React
- Redux
- Material UI
- Node.js
- Meteor.js
- AWS
- Docker
- MongoDB
- Babel
- ESLint
- Husky
JSE GmbH
Software Developer
01/2023 – 07/2026
Employer throughout; client projects at EASYDAY GmbH and digital35 GmbH listed above. In-house development 01/2023 – 05/2023.
Enhancement and maintenance of a Java-based backend system with DevOps and frontend integrations.
Responsibilities
- Enhanced backend functionalities using Java and a modern web framework
- Designed and implemented RESTful APIs
- Implemented the data access layer using ORM frameworks and relational databases
- Managed database migrations
- Applied dependency injection principles
- Refactored and improved the existing codebase for maintainability and performance
- Developed unit tests and improved test coverage
- Implemented frontend features using server-side templates and modern JavaScript frameworks
- Maintained and optimized CI pipelines
- Deployed containerized applications in cloud environments
- Led internal technical trainings and mentoring programs for developers
- Java
- Scala
- JavaScript
- HTML
- CSS
- Sass
- Play Framework
- Hibernate
- Guice
- JUnit
- Mockito
- Checkstyle
- MySQL
- Flyway
- sbt
- Git
- GitLab
- Docker
- Docker Compose
- Kubernetes
- Nginx
- Google Cloud Platform
- Jira

Contact

Let's talk

Do you have a project or a question about backend architecture? Write to me and I will get back to you shortly.