# Serhat Keskin

> Serhat Keskin is a full-stack developer and solutions architect who builds
> production web applications and AI-enabled systems: Python/Django/FastAPI
> backends, React and Next.js frontends with TypeScript, and AWS cloud
> infrastructure. AWS Certified Solutions Architect – Associate and AWS
> Certified Developer – Associate. Available for freelance projects,
> collaborations and full-time roles.

- Role: Full-Stack Developer and Solutions Architect.
- Core stack: Python, Django, Django REST Framework, FastAPI, Celery, React,
  Next.js, TypeScript, PostgreSQL, Redis, Docker, Terraform, AWS.
- AI and automation: LLM integration (Claude API, OpenAI API, Gemini API),
  retrieval-augmented generation with LangGraph, LlamaIndex and pgvector,
  human-in-the-loop AI agents.
- Cloud: AWS ECS/EKS, Lambda, RDS, S3, SQS/SNS, CloudFront, Route 53, IAM;
  also ships on Cloudflare Pages and Workers.
- Certifications: AWS Certified Solutions Architect – Associate; AWS Certified
  Developer – Associate. Both verifiable on Credly.
- Education: MSc Computer Science, University of Passau; BSc Computer
  Engineering, Ostim Technical University.
- Availability: open to freelance projects, collaborations and full-time
  opportunities.
- Contact: the contact form on https://serhatkeskin.com/#contact, or book a
  20-minute call at https://calendly.com/serhatt/20-min-meeting

## Site

- [Home](https://serhatkeskin.com/): the whole portfolio on one page — about,
  skills, selected projects with demo videos and case studies, AWS
  certifications and contact.

## Selected projects

- [AI Accounting Agent](https://serhatkeskin.com/#project-ai-agent): freelance,
  self-hosted multi-tenant platform for accounting firms. Syncs the firm's
  IMAP/SMTP mailbox, classifies each thread with an LLM, drafts a multilingual
  reply and routes it through a human-in-the-loop approval queue; nothing is
  sent without accountant sign-off. Django 5.2, Celery, Redis, PostgreSQL 16,
  React 19, Gemini 2.5 Flash, Docker.
- [PixiTale](https://pixitale.app): personal, an AI platform that turns a
  child's photo into a personalised, illustrated and narrated picture book,
  shipped on web plus native iOS and Android. Django 5.2, DRF, Celery, AWS S3,
  Gemini 2.0 Flash, React 19, Ionic 8, Capacitor 7.
- [RAG Explorer](https://rag.projects.serhatkeskin.com): personal,
  a production-deployed retrieval-augmented generation pipeline. LangGraph
  retrieves semantically relevant chunks from pgvector and Gemini returns a
  grounded, cited answer, with per-tenant document isolation. LlamaIndex,
  pgvector, PostgreSQL 16, DRF, Next.js 15, Cloudflare Pages.
- [EKMS](https://ekms-demo.pages.dev): personal, a modular enterprise knowledge
  management system with a Notion-like BlockNote editor, project workspaces,
  role-based access control and instant full-text search. React 18, TypeScript,
  Material UI v5, BlockNote, Zustand, React Query.

## Case studies (PDF)

- [AI Accounting Agent](https://serhatkeskin.com/dist/docs/ai-agent-project.pdf)
- [PixiTale](https://serhatkeskin.com/dist/docs/pixitale-overview.pdf)
- [RAG Explorer](https://serhatkeskin.com/dist/docs/rag-explorer-overview.pdf)
- [EKMS](https://serhatkeskin.com/dist/docs/ekms-demo-overview.pdf)

## Elsewhere

- [GitHub](https://github.com/serhatkeskin)
- [LinkedIn](https://www.linkedin.com/in/serhat-keskin/)
- [AWS Certified Solutions Architect – Associate](https://www.credly.com/badges/c3c0364e-0ad9-4d4c-a313-e10e0d6c3708/public_url)
- [AWS Certified Developer – Associate](https://www.credly.com/badges/94ea7347-72b1-4f16-9fe3-cce208b0783e/public_url)

## Optional

- [Full text](https://serhatkeskin.com/llms-full.txt): everything on the site as
  plain Markdown, including each project's full overview and feature list.