Mirwan Akaygün
Software Developer · Backend · Frontend · API Integration
Software Developer with nearly 10 years of experience building scalable backend and frontend solutions — robust REST APIs, relational databases, modern frontend frameworks (Angular, React, React Native), and production LLM integration. End-to-end delivery from architecture to production. Remote from Germany.
Skills & Competencies
Backend & APIs
Java · Spring Framework · Python · REST API design · OAuth2 · webhooks · async pipelines · microservices · C# (basic)
Databases
Oracle · PL/SQL · MySQL · PostgreSQL · SQLite · stored procedures · triggers · index tuning · ETL · Power BI
Frontend
Angular · React · React Native (Expo) · TypeScript · JavaScript ES6+ · HTML5 · CSS3 · SASS · Bootstrap
DevOps & Tools
Git · GitLab CI · Jenkins · IntelliJ IDEA · Oracle SQL Developer · Linux · logging · monitoring
AI & Automation
LLM integration (OpenAI, Anthropic, Qwen) · prompt engineering · n8n · Make · vision APIs
Software Quality
JUnit · Jasmine · Karma · unit & integration testing · code reviews · agile (Scrum, Kanban)
Professional Experience
Software Developer · Umbolement LLC
03/2024 – present- Architecture and operation of complex Python-based integration platforms synchronizing and orchestrating multiple e-commerce marketplaces via REST and SOAP interfaces with high concurrency and fault tolerance
- Intelligent automation systems using Large Language Models for dynamic price optimization, competitive analysis, and automated assortment expansion
- Event-driven microservice architecture for real-time synchronization of inventory, pricing, and order data across multiple marketplaces
- Central analytics dashboard with complex data models and real-time reporting for data-driven business management
- Resilient backend infrastructure focused on caching strategies, load balancing, and automated scaling in the cloud
- Modern customer experience platform with responsive, high-performance web and mobile components
- CI/CD pipelines and Infrastructure-as-Code to accelerate release cycles and improve software quality in production
- PL/SQL programs for Oracle databases to improve data integrity and query performance
- REST APIs with Java and the Spring Framework integrating internal backend systems and external third-party services
- Relational data models including stored procedures, triggers, and performance optimization of high-traffic tables
- Migration of legacy components to modern Java-based architectures with a focus on backward compatibility
- Automated unit tests with JUnit; agile development (Scrum, Kanban) including code reviews and sprint planning
Frontend Developer (Freelance) · Experl Software & Solutions
09/2019 – 02/2024- Scalable Angular single-page applications with a modular component design and reactive state management via RxJS
- Reusable UI components and shared service layers to reduce code duplication
- Integration of REST API endpoints for dynamic data visualizations, real-time updates, and complex filtering and search
- Performance optimization through lazy loading, OnPush change detection, and bundle splitting to reduce load times
- Comprehensive unit testing with Jasmine and Karma as well as end-to-end tests
- Cross-browser compatibility and accessible design following WCAG guidelines using HTML5, CSS3, SASS, and Bootstrap
- Contribution to CI/CD pipelines (Jenkins, GitLab CI) for automated build and deployment
- Close collaboration with UX/UI designers and backend teams
Education
IT Specialist for Application Development (Fachinformatiker) · CREALOGIX
09/2016 – 08/2019- Practical application development with HTML, CSS, JavaScript, Angular, and SQL
- Software quality assurance through automated testing with Jasmine and Karma
- Database design, relational modeling, and SQL programming
- Agile development methods and version control with Git
About
In tech since 2016, certified application developer (Fachinformatiker / IHK). Nearly a decade building backend systems, REST APIs, relational databases, and modern frontends — with a focus on performance, data integrity, and reliable production operation.
End-to-end, self-directed delivery from architecture to production. Business-fluent English and extensive experience operating mission-critical systems. Remote from Germany.
Let’s work together
Available for new projects, remote from Germany. Send me a short brief and I’ll get back to you.