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Adrean Jan Quidor (Kofeejan)

[ SERVICES ]

Services

Backend-focused product builds, practical AI workflow automation, and game prototype tools — scoped work with clear deliverables and handoff.

Hiring for a full-time role? See projects and experience for engineering depth.

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Contact for quote · scoped engagements

AI Workflow Automation

Practical AI automation for triage, classification, retrieval, and document workflows. I focus on grounding, validation, and safe failure paths.

[ INCLUDED ]

  • Workflow discovery and automation scoping
  • RAG-based retrieval and AI-assisted triage
  • Validation and confidence-gating workflows
  • Model and API integration (Gemini, OpenAI, or local models)
  • Cloud or local deployment
  • Handoff documentation

[ OUT OF SCOPE ]

  • Custom model training
  • Production platform operations at scale
  • Third-party API licensing costs
PythonAIRAGChromaDBValidationGCP

Backend & Product Engineering

Backend-first product development for APIs and full-stack features, from domain modeling and authentication to frontend integration and deployment.

[ INCLUDED ]

  • API design and implementation
  • Validation, authentication, and authorization
  • PostgreSQL schema design
  • React or Next.js frontend integration
  • Cloudflare Workers or Cloud Run deployment
  • Testing and API documentation

[ OUT OF SCOPE ]

  • Advanced UI/UX design and prototyping
  • Database-heavy or advanced data-platform work
  • Ongoing maintenance beyond agreed scope
TypeScriptPythonFastAPINestJSPostgreSQLReactCloudflare Workers

Game Systems & Prototype Tools

Scoped game systems, prototype tooling, and gameplay logic for small teams, with C# / Unity and browser-based game experience.

[ INCLUDED ]

  • Game systems and mechanic implementation
  • Prototype tooling and gameplay state flows
  • Unity / C# development
  • Browser-based game prototypes with Phaser
  • Technical documentation and handoff

[ OUT OF SCOPE ]

  • Art asset creation, sound design, and music
  • Large-scale production game backend operations
  • Publishing and store submission
C#UnityPhaserTypeScriptGame SystemsTools

[ PROCESS ]

How a project runs

  1. [ 01 ]

    Discovery call

    30-minute scope review — problem, constraints, timeline, and fit.

  2. [ 02 ]

    Proposal

    Written scope, deliverables, timeline, and a quote based on your needs.

  3. [ 03 ]

    Build & deliver

    Incremental checkpoints, async updates, and handoff with docs.

[ FAQ ]

FAQ

How many revisions are included?
Two revision rounds per milestone are included. Additional scope changes are quoted separately before work continues.
Who owns the IP?
You own the deliverables upon final payment. I retain the right to describe the work in my portfolio unless under NDA.
How do we communicate?
Async-first via email or Slack. Weekly sync calls available for active builds. I reply within 24 hours on business days.

Ready to scope a build? Share project type, budget, and timeline on the contact page.

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