Stefan Richter

Senior Backend Software Engineer

Not specified, DE.

About

Highly accomplished Senior Backend Software Engineer with 8+ years of expertise in designing, building, and scaling robust, production-grade backend systems across e-commerce and insurance domains. Specializes in API-driven architectures, asynchronous processing, and legacy system modernization, driving performance, security, and maintainability. A Symfony Certified Developer and iSAQB Certified Software Architect, adept at leading remote-first teams and fostering cross-functional collaboration to deliver impactful technical solutions.

Work

Web Fabric GmbH

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Senior Backend Consultant

Not specified, Not specified, Germany

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Summary

Led backend development and architectural refactoring for a solar mounting system configurator, ensuring scalable and flexible e-commerce-like functionality.

Highlights

Led technical direction as Tech Lead for a complex solar mounting system configurator, overseeing backend development with PHP (Symfony) and TypeScript (Angular).

Designed and refactored core backend systems, enhancing data model flexibility and scalability to support intricate configuration logic.

Engineered and maintained robust API-driven communication channels, ensuring seamless integration between frontend and backend components.

Collaborated effectively within a remote setup and cross-functional team, delivering critical e-commerce-like functionalities.

Freelance Software Developer

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Freelance Software Developer

Not specified, Not specified, Germany

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Summary

Provided comprehensive software development and consulting services to diverse clients, specializing in custom e-commerce platforms, payment integrations, and automation solutions.

Highlights

Designed and developed multiple custom e-commerce platforms and robust backend systems, tailored to specific client needs.

Successfully integrated various Payment Service Providers (Mangopay, PayPal), managing complex transaction handling and webhook processes.

Built scalable API-driven architectures, facilitating efficient frontend-backend communication and system integrations.

Developed Python and Raspberry Pi-based automation tools, significantly reducing operational overhead for clients.

Delivered AI-based automation solutions, enhancing client capabilities and streamlining business processes.

Webnet

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Senior Backend Engineer

Not specified, Not specified, Germany

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Summary

Served as a Senior Backend Engineer and Tech Lead, developing and maintaining large-scale Symfony and Drupal systems for clients in the insurance sector.

Highlights

Developed and maintained large-scale Symfony backend systems, ensuring high performance and reliability for critical client applications.

Served as Tech Lead for an insurance intranet platform, guiding architectural decisions and implementation strategies.

Led continuous refactoring initiatives for legacy PHP systems, significantly improving code maintainability and long-term stability.

Designed and implemented robust REST and SOAP APIs, enabling seamless integration with diverse external and internal systems.

Enhanced system reliability and developer experience across long-lived codebases, optimizing development workflows and reducing technical debt.

BookaFox

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CTO

Not specified, Not specified, Germany

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Summary

As CTO, spearheaded the end-to-end technical and product development for a tutor matching platform, from conception to successful launch.

Highlights

Spearheaded the technical vision and full-stack development for a tutor matching platform, leading it from concept to successful market launch.

Owned the entire technical stack, making critical architectural decisions and ensuring product scalability and performance.

Managed product development lifecycle, translating business requirements into technical specifications and feature implementations.

Dr. Joachim Wiesemann Ingenieurdienstleistungen

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Working Student Software Developer

Not specified, Not specified, Germany

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Summary

Contributed to software development projects in C++, PHP, and Python as a working student, supporting engineering service initiatives.

Highlights

Contributed to software development using C++, PHP, and Python, supporting various engineering service projects.

Assisted in the implementation and testing of software modules, gaining foundational experience in diverse programming languages.

Education

FH Aachen University of Applied Sciences

Aachen, North Rhine-Westphalia, Germany
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B.Eng. Electrical Engineering Grade:

Languages

German

English

French

Spanish

Certificates

Symfony Certified Developer

SensioLabs

iSAQB Certified Software Architect

iSAQB

Skills

Backend & Languages

PHP (Symfony 2–7), Python, JavaScript, Bash, C/C++.

Architecture & Backend Engineering

API-first architectures (REST), Asynchronous processing (queues, message-based workflows), Event-driven systems, Domain Driven Design (DDD), Refactoring of large legacy systems, Performance optimization & profiling.

Data, Infrastructure & DevOps

PostgreSQL, MySQL, MariaDB, Redis, Docker / Docker Compose, CI/CD (GitLab CI, Jenkins, Bitbucket), Linux environments.

Payments & E-Commerce

Integration of Payment Service Providers (PSP), Mangopay, PayPal, Handling payment workflows (transactions, refunds, webhooks), E-commerce and marketplace-like systems.

Quality & Security

Unit & integration testing, TDD mindset, Web security best practices (OWASP, CSRF, authentication flows), Clean Architecture principles, Code reviews & collaborative development.

Additional Skills

Angular (frontend collaboration), AI-assisted development (Claude, Antigravity), Reliability focus, Developer experience focus.

Key Strengths

Ownership of backend systems in production, Deep expertise in Symfony ecosystems and legacy modernization, Translating business requirements into scalable backend solutions, Remote collaboration, Cross-team communication.

Stefan Richter