Software Architecture and Development Consulting
Just like a building,
software needs a solid architecture
Contact me now Implementing business ideas
is like building a house.
You can picture it. You can imagine how it will grow and make people happy for a long time.
Having the same clarity on a technical level is challenging. Confidence in your technical decisions is a must-have but requires real-world experience. Just like on a construction site, a well thought out plan is crucial for the success of your project. It will streamline development, avoid expensive mistakes, and enable strategic shortcuts that won’t hurt you later.
„It’s easy to feel overwhelmed by the need to translate the idea into a structured solution that keeps feasibility, flexibility, affordability, scalability, security and sustainability in mind.“
You need an experienced software architect to guide you!
Over the past ten years, I’ve worked with small startups as well as global companies like adidas, helped them implement their business ideas by creating technical plans and by guiding their development teams through projects. The proudest I am about the success we had with Runtastic. They got acquired by adidas in 2015 for €220 million.
Simon Lasselsberger
Founder Lasssim,
Software Architecture and Development Expert

I worked on projects that involved
- Android, iOS and Web clients
- Scalable Microservices and Event-driven Architectures using Java, C# and Ruby
- API definitions
- Databases like MySQL, MongoDB, Cassandra and Elasticsearch
- CI/CD pipelines using Docker, Kubernetes or OpenShift
- Agile development process
What others say about me

Christian Kaar
former CTO & Co-Founder
Runtastic GmbH
Although his know-how and professional skills are a tremendous benefit, what additionally makes Simon a precious team member is the respectful and exemplary way he interacts and socialized with team members and his exemplary sense for team dynamics.

Sebastian Michelic
Managing Partner and Co-Founder
qoncept dx GmbH
In our collaboration, we were designing the complete software architecture and data structure, and the high expectations were well met. In this design process, we could greatly benefit from Simon's expertise as a software architect in terms of choice of tools, problem abstraction, technological know-how, and working principles together with our team.
I greatly enjoy working with such a vivid and clever mind and can only recommend choosing Simon for any challenging software project that you have in mind.

Alexander Wahler
CEO and Co-Founder
ONLIM GmbH
Simon supported us in finalizing and roll out of our new updated SaaS/PaaS architecture. It was a great professional collaboration for the whole team!
You can find more testimonials
on my LinkedIn profile
Clients & Partners





How can I help you?
SIMON LASSELSBERGER
Software Architecture and Development Expert