Let'sBuild
I take products from idea to production. Senior architecture, AI-accelerated delivery, and full ownership of the build. We ship fast without cutting corners.

I'm Mario
13+ years of engineering, mainly in payments, digital identity, and security. I lead development teams and build backend systems that stay in production.

Backend Architecture
APIs, data models, and services designed to handle real production load and scale from day one.
Platform Engineering
CI/CD, observability, and infrastructure tooling that keeps deployments predictable and teams shipping confidently.
AI-Assisted Development
Using AI development tools to accelerate implementation without sacrificing architecture quality or code reliability.
APIs & Integrations
Reliable, well-contracted integrations with payment processors, crypto protocols, CRMs, and third-party platforms.
Automation Systems
Replacing manual processes with reliable, observable automation. Pipelines, orchestration, and internal tooling.
Fintech & Payments
Payment infrastructure, crypto platforms, and financial workflows built for correctness, compliance, and uptime.
What I Build
The areas I cover, built around shipping complete, production-ready systems.

Senior Software Engineer
Deep Impact AG · May 2025 - Present
Lead engineer on client AI projects, designing and integrating LLM APIs (Claude, OpenAI) into production-ready products.
Senior Software Engineer
Paddle · Mar 2020 - May 2025
Built and improved payment methods and acceptance across a billing platform used by thousands of SaaS businesses, pushing acceptance rates higher.
Senior Backend Developer
TouchNote · Apr 2019 - Mar 2020
Led a small backend team building a microservices architecture in Go and Node behind an API-Gateway, deployed on AWS, Kubernetes and CircleCI.
Backend Developer
Yoti · Oct 2017 - Apr 2019
Delivered a digital identity company's admin platform and microservices infrastructure in Go and Node, with security and data protection central to the work.
Project Manager / Full Stack Developer
iGEO ERP · Mar 2016 - Oct 2017
Built a cloud-based ERP for pest-control companies from scratch, moving from full-stack developer to project manager within months.
Experience
13+ years across payments, digital identity, and security, leading teams and shipping backend systems end to end.

Technologies
Proven tools chosen for reliability. The stack is secondary to the system design.

Seamless Deployments
Reliable releases with monitoring, rollback, and observability built in from the start.

OpenAI Claude
AI Integrations
LLM pipelines, retrieval, and AI-assisted workflows hardened for production environments.

Project Showcase
Systems I've designed and shipped. Payment platforms, crypto systems, SaaS backends.

Let's work together.
Tell me what you're building. I'll respond within a day.
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