Eren Dogruca

Fullstack engineer with 6+ years of experience in Node.js, TypeScript and Next.js. Built AI and LLM applications, scalable backend systems and payment integrations. Comfortable across backend, frontend and cloud.

Experience

chitchat.gg — Software Engineer (Infra, Backend)Jan 2026 – Present

Working on backend, cloud infrastructure and data layer in a production Kubernetes environment. Set up observability with SigNoz and Sentry. Migrated k3s cluster from DigitalOcean to Hetzner, cutting infrastructure costs by about 50%. Built a secure MongoDB archive on cloud with Docker, automated backups and resumable migration scripts. Designed new PostgreSQL schemas to merge two applications with normalization and selective denormalization.

Chainstep GMBH — Backend Service DeveloperJul 2021 – Jan 2026

Built AI apps with Next.js, LangChain and RAG using Pinecone and pgvector for workflow automation and agent systems. Developed scalable backend and microservices with Node.js, TypeScript, Python, Golang and Postgres, integrating Stripe and PayPal. Worked on web3 and NFT platforms including marketplaces, ticketing and B2B APIs. Contributed to a government-funded R&D project by building a Java SpringBoot proxy for decentralized identity integration. Delivered fullstack web and mobile apps with Next.js, React, Flutter and NestJS. Managed Kubernetes and CI/CD with Docker and GitHub Actions.

SambaPOS — Mobile Application DeveloperSep 2020 – Mar 2021

Developed a cross-platform mobile app with Flutter, integrating GraphQL APIs and SQLite for offline functionality. Built order management and checkout workflows with real-time table occupancy via WebSockets.

Mandarin Health — Backend DeveloperOct 2019 – Aug 2020

Developed backend services for a health app using Node.js, Express, and MongoDB, calculating personalized health scores and nutrition suggestions. Implemented APIs and data models to support mobile app functionality in an agile startup environment.