Founding engineer
Built the iOS app and backend. Grew the product to more than €15k in annual recurring revenue.
Software engineer and founder
I build apps
and backend systems.
I work on marketplace foundations at OTTO and build consumer products independently.
Based in Stade, Germany.
Experience
Tech Lead (Technical Designer)
Tech lead for my invoicing team, owning technical direction, implementation approaches, and delivery across Java and Spring Boot services, AWS Lambda workloads, data stores, and service integrations.
Software developer
Built and operated services in the invoicing domain: Java and Spring Boot microservices, JavaScript and Python AWS Lambdas, MongoDB and DynamoDB, and AWS infrastructure managed with Terraform. Used AWS SQS and Kafka for asynchronous communication and RESTful APIs for synchronous integrations.
Founding engineer
Designed and built the mobile apps and internal tools. Reached about 15k waitlisted users and 3k concurrent active users.
Junior software developer
Developed asynchronous and synchronous services in the marketplace foundation area.
Apprentice
Worked across teams ranging from search to marketplace foundation during the application-development apprenticeship.
Stack
Capabilities
System design
Building and architecting systems that handle more than €100m in weekly volume.
Backend development
APIs, data stores, integrations, and reliable production services.
Live systems
Debugging production systems, analysing incidents, and resolving issues under pressure.
Mobile development
Native iOS products with Swift and SwiftUI.
Cloud and delivery
AWS infrastructure, containers, CI/CD, and day-to-day operations.
Agentic development
Bringing AI agents into engineering workflows and helping teams adopt them well.
Product engineering
Taking a product from the first build through to release.
Education
Berufliche Schule ITECHFachinformatiker für Anwendungsentwicklung
Volkshochschule MSEMittlere Reife
Want to work together?
✦ marcschmidt21341@gmail.com ↗Available for selected product and engineering work.