Leonhard – Golang, Java, AWS

An AWS-hosted B2B product portfolio used by thousands of enterprise users.

• Built a Go/AWS serverless crawler to index product knowledge from Jira, Confluence, GitHub, and Google Docs for RAG.
• Developed an AI copilot for enterprise intranet software using Java, Spring Boot, and AWS serverless.
• Modernized Java applications, including migration of Spring and Spring Security from version 3 to 5.
• Migrated Kubernetes-based hosting and fleet management for intranet software to Amazon ECS.
• Implemented and migrated CI/CD pipelines to GitHub Actions workflows.
• Built an AI assistant for a DNN CMS using C#/.NET, AWS serverless, and Bedrock.
• Implemented bug fixes and reliability improvements across Java-based software products.
• Built an AI-driven software maintenance system with Claude Code, including an orchestrator, sub-agents, and automated quality checks.
• Designed an MCP-based diagnostic harness combining source code, monitoring, logs, and application data for defect investigation.
• Investigated production outages and critical incidents using root-cause analysis and drove remediation and regression prevention.
• Performed architecture, design, and code reviews and owned delivery on time and at the required quality level.
• Re-established thousands of unit and end-to-end tests and introduced verified development, build, test, release, and deployment documentation.

A transactional cloud filesystem developed in collaboration with a UC Berkeley researcher.

• Collaborated with a UC Berkeley researcher on a transactional cloud filesystem using Go, C, and AWS.
• Performed high-concurrency load testing, identified race conditions and reliability issues, and contributed fixes to the kernel/userspace interface.
• Focused on uncovering and resolving complex issues that emerged under real-world concurrency conditions.

A Mercedes-Benz online store featuring to-order and used cars.

• Developed back-end services and APIs for the company's digital products using Go, OpenAPI, and MongoDB.
• Focused on scalable back-end architecture and reliable software delivery.

Web apps for different customers.

• Built web applications and combined technical delivery with project and product management.
• Supported clients in translating business requirements into software solutions.

Europe’s largest telecommunications provider, operating fixed-line, mobile, broadband, TV, and ICT services in 50+ countries.

• Created product concepts and technical requirements for web and IPTV products.
• Coordinated external engineering teams and delivery of web-based product initiatives.
• Translated business opportunities and product ideas into actionable development projects.
• Conducted market research, competitive analysis, and requirements engineering to guide development efforts.