Gulbala S.

I design and deploy production-grade large scale applications. With proven experience at global companies like 𝗧𝘂𝗿𝗸𝗶𝘀𝗵 𝗔𝗶𝗿𝗹𝗶𝗻𝗲𝘀 and 𝗨𝗻𝗶𝘃𝗲𝗿𝘀𝗶𝘁𝘆 𝗖𝗼𝗹𝗹𝗲𝗴𝗲 𝗟𝗼𝗻𝗱𝗼𝗻, I build robust, scalable, and well-tested web and mobile solutions tailored to your business goals. 🏆 𝗡𝗼𝘁𝗮𝗯𝗹𝗲 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀 (𝗦𝗲𝗲 𝗹𝗶𝘃𝗲 𝗱𝗲𝗺𝗼𝗻𝘀𝘁𝗿𝗮𝘁𝗶𝗼𝗻 𝗶𝗻 𝗽𝗼𝗿𝘁𝗳𝗼𝗹𝗶𝗼) 1 - Drive Weather App (100K+ users) - 2026 Built custom routing APIs using OpenStreetMap and GraphHopper routing engine with vehicle-specific profiles and high-accuracy ETA predictions across North America. 2 - ScooterNav (Netherlands) - 2025 Designed Nedherland's first custom scooter routing solution with ferry handling and regional road optimization. 3 - Turkish Airlines Developer Portal (2024) Delivered enterprise-grade REST APIs suite integrated into one of the world's largest airline platforms. 4 - European Research Council Project (€2.5M Funded, 2021) Contributed as Java Developer & Researcher in an international academic consortium. 5 - “Android Mobile Programming in Java” (2017) Used as a recommended textbook in several Turkish universities. 𝗠𝘆 𝗰𝗼𝗺𝗽𝗹𝗲𝘁𝗲 𝗯𝗮𝗰𝗸𝗲𝗻𝗱 𝗮𝗻𝗱 𝗳𝘂𝗹𝗹-𝘀𝘁𝗮𝗰𝗸 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀: - end-to-end system development from concept to production. - AI integration - backend automation platforms - designing scalable APIs - deploying cloud and VPS servers 𝗜 𝗮𝗹𝘀𝗼 𝗵𝗲𝗹𝗽 𝗰𝗼𝗺𝗽𝗮𝗻𝗶𝗲𝘀 𝘁𝗼: - build routing and navigation solutions using GraphHopper and OpenStreetMap. - optimize paths for various vehicle types (cars, trucks, motorbikes, bikes, scooters and so on) and pedestrians - develop high-accuracy ETA systems - deploy scalable geospatial infrastructure - configure geocoding systems (text address to geographical coordinates and vice versa) using Nominatim, Photon, Pelias If you have a question, you can book me for a consultation. We can review the key points efficiently and define the best next steps. 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗦𝘁𝗮𝗰𝗸𝘀: - Frontend Integration & UI Development (Angular, JSF, PrimeFaces, HTML/CSS) - Backend Development (Java & Spring Boot) - Secure Authentication (JWT, Spring Security) - Database (OracleSQL, MSSQL, PostgreSQL, MyBatis, Redis Caching, CouchBase) - Unit & Integration Testing (JUnit, Mockito) - CI/CD Pipelines & Docker - Documentation & Technical Writing (Markdown, Swagger/OpenAPI, ApiCurio) - Domain Expertise: GraphHopper. OpenStreetMap, Nominatim, Pelias 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗲𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 I always aim to improve my skills at all time and get certified by respected organizations.