eniscakircali

Full Stack AI Developer

H24 • Part time

Nov 2025 - Present • 9 mos

As a Senior Full Stack Developer for the Findus One and Veritas One AI platforms, I was responsible for implementing and maintaining scalable B2B and B2C payment infrastructures using Stripe. I designed and integrated complete subscription and billing flows, including customer onboarding, recurring payments, plan management, and secure payment handling across multiple product environments. I actively maintain and improve the core platform architecture built with React, Next.js, Python FastAPI, Redis, MCP, and Haystack, ensuring high performance, scalability, and reliability for AI-driven applications serving multiple large language models and chat workflows. On the frontend side, I developed and optimized complex user interfaces using React and Next.js, focusing on responsive design, modular architecture, and seamless user experiences for AI chat interactions and account management systems. On the backend side, I contributed to API development and system integrations using FastAPI, implemented caching and performance optimizations with Redis, and supported AI orchestration pipelines leveraging Haystack and MCP-based tooling for multi-model communication and retrieval workflows. I collaborated closely with cross-functional teams to deliver production-ready features, troubleshoot platform-level issues, and continuously improve system stability, maintainability, and deployment efficiency across the entire product ecosystem.

Full Stack Developer

talsen team GmbH • Full time

Jan 2024 - Present • 2 yrs 7 mos

At Talsen Team, I have been actively participating in the development of multiple large-scale, enterprise-grade applications, with a strong focus on BDD (Behavior-Driven Development) and TDD (Test-Driven Development) methodologies. My contributions span both the Node.js backend and modern JavaScript/TypeScript frontend environments. I played a key role in the development of ARA, an AI-integrated and BDD-based project management platform. Here, I contributed to both backend and frontend architecture, implemented core business logic, refined component structures, and helped integrate advanced AI features into user flows. One of my major contributions has been to the Video-to-Summary Streamlit SaaS platform, where I developed essential backend processing features using Python. I engineered modules for video and audio handling, transcription pipelines, token usage control, membership management, and the overall operational flow of the SaaS environment. This project strengthened my expertise in Python video/audio processing, AI-based transcription systems, and end-to-end SaaS product logic. I also collaborated with Chiemgau Control on LinearLift, a React Native mobile application enabling users to control machinery via Bluetooth modules. I contributed to implementing Bluetooth connectivity layers, device pairing logic, and user interaction flows, enhancing my knowledge of hardware-integrated mobile development.

Senior Frontend Developer (External)

Novogenia GmbH • Full time

Jul 2024 - Oct 2025 • 1 yr 3 mos

As an external Senior Frontend Developer for Novogenia, I was responsible for modernizing and restructuring the core admin panel used by international teams. I migrated the application to a feature-based architecture, enabling better scalability, separation of concerns, and code clarity. I implemented TanStack Query to enhance server-state management, introducing an intelligent cache layer that significantly improved request efficiency and user experience. Additionally, I set up a robust Axios middleware architecture to properly handle authentication, request pipelines, retry strategies, and error centralization. Throughout the project, I refactored large parts of outdated or repeated code into reusable, optimized components and utilities, improving maintainability and reducing technical debt. Working within a large engineering team, I maintained strong communication and ensured alignment with design, backend, and management teams. I consistently delivered fast, accurate solutions to frontend requirements and provided stability and performance improvements across the entire system.