Aldren Arcenal

Frontend/Backend Developer (Freelance) at Xpertis Solutions

Implemented a WebSocket-based real-time update system and responsive admin and customer interfaces. Ensured real-time updates and proper server-side API payloads, using NextJS, Tailwind CSS, JavaScript, FastAPI, PostgreSQL; redesigned UI with Glassmorphism to modernize the UI and improved overall UX. Followed Agile practices by creating user stories, participating in sprint retrospectives, and discussing progress in daily stand-ups.

Frontend/Backend Developer at Xeleqt Technologies Innovations Inc.

Co-developed front-end and back-end features for mobility console; integrated Supabase, FastAPI, AWS Lambda and CloudWatch; built time-zone aware scheduling logic and asset-tracking dashboards; implemented NLP tooling (Django REST API with JWT) for sentiment analysis; deployed a sentiment model in a Flutter app; developed Retrieval Augmented Generation (RAG) prototype for thesis; emphasized Agile practices.

Thesis Project Lead at TopIT

Personalised Reviewer for TOPIC using Retrieval Augmented Generation (RAG) and CAT; implemented RAG with Chromadb and integrated with a Flutter app via FastAPI; used GPT-4-turbo as LM for the pipeline; end-to-end prototype with real-time data handling.

Freelance AI Developer / Thesis Project Lead at TopIT

Personalized Reviewer for TOPC IT using RAG and CAT (Thesis Project). Implemented Retrieval Augmented Generation using ChromaDB with ChatGPT-4 as the LM and deployed it using FastAPI, ensuring seamless integration with our application. Pre-processed, trained and evaluated supervised models to identify the best performing algorithm for question difficulty classification, improving precision of adaptive testing. Analyzed performance bottlenecks in the ML pipeline and implemented data preprocessing optimizations, solving accuracy challenges that yielded a 20% performance improvement from 75% to 91%. Stack included NextJS, TailwindCSS, JavaScript, FastAPI, PostgreSQL.