Software architect for serverless platforms & FinTech backends.
Founder of Inselio. I design and build secure, scalable systems on AWS with Python, and help teams bridge the gap between complex code and business goals.
Introduction
I am a Senior Software Architect and the Managing Director of Inselio, a consultancy specializing in Python, AWS, and complex backend architectures.
Currently acting as lead technical consultant for a US-based bank: architecting serverless platforms, ensuring SOC 2 compliance, and building scalable, secure systems for the financial sector.
I combine deep technical knowledge with the business acumen of a founder, having built and sold an Android app with 1M+ downloads, helping clients bridge the gap between complex code and business goals.
Lead consultant for a US bank
Serverless payment platform, core banking integration and fraud detection.
SOC 2 ready by design
Security, auditability and compliance built into the architecture from day one.
AI-native delivery
Claude Code and coding agents are part of every project I ship: faster iterations, more automated testing and documentation, a lower bill for the same result.
Founder mindset
Built an Android app to nearly 500k downloads and sold it in 2024. It has since passed one million.
What I Offer
From a first architecture sketch to a compliant production platform, I cover the full lifecycle, and every service comes with the stack that delivers it.
References
Recommendations from people I have built for and worked with, quoted as written on LinkedIn.
I have had the pleasure of working with Denny for nearly 11 years at Labsolution. He has consistently demonstrated exceptional technical skills across various roles. As a Senior Developer, his work on modernizing our systems and improving performance has been outstanding. Denny is a highly skilled professional, and I highly recommend him for any future roles.
I rarely come across real talents who stand out Denny. We have worked closely together on numerous projects across multiple start-ups supporting both product and legal teams and he has consistently exceeded my expectations. He has a unique gift for coming up with clever approaches to our data manipulation challenges and is always the first person I go to when I have a difficult problem to solve.
I am thrilled to recommend Denny for any sophisticated back-end development work that requires the extraction and manipulation of data. He is responsive, efficient, and exceeds expectations in terms of the quality of his work. I have worked with Denny across two start-ups and we have relied on him for his expertise and creativity in solving complex data challenges - that ultimately saved us time and made us more productive and allowed us to get better products to our customers faster.
Case Studies
A selection of products I have designed, built and shipped, from banking infrastructure to an app with over a million downloads.
Link on requestServerless AWS platform for a US bank: payment APIs (ICL, ACH, WIRE), SOC 2 compliance and fraud detection. Multi-region with 99.9% uptime, CI/CD via GitHub Actions and AWS SAM.
Sold in 2024Native Android app displaying photos on an interactive world map. Grown to nearly 500k Play Store downloads and sold in 2024; it has since passed one million.
OnlineInvoicing tool for freelancers and coaches to generate invoices directly on the final layout. Available as a PWA, in the Google Play Store and the Microsoft Store.
PrivateTime tracking app with workspaces and a configurable reference field that makes invoicing effortless. Hosted on AWS with gunicorn, gevent and nginx.
ArchivedSnap a photo and get playlist suggestions to match. A fun project showing what is possible with managed ML services on a native Android app.
ArchivedLive map of tree nurseries for the NGO Graine de Vie. Photos taken on site in Madagascar are submitted through a Kotlin Android app and AWS API Gateway/Lambda to a PhotoPrism server, and the map shows the growing progress. Volunteer work.
Website designed and developed together with Jürgen, bringing the passion for cheese to the digital world. Started on WordPress in 2024 and rebuilt in SvelteKit in 2026.
Work History
Over a decade of shipping software, from industrial automation to healthcare systems to banking platforms.
Inselio
labsolution
Levion Software
labsolution
labsolution
Grohmann Automation (now Tesla)
Get in touch
Need an architecture review, a serverless platform or a senior hand on a FinTech project? I'd love to hear about it.
