Danai Zerai
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Case StudyJanuary 2024

Client Systems & Booking Platform

Delivered end-to-end production systems for multiple clients as a solo freelancer — including a Go/Next.js booking platform with Gmail API integration, a high-performance portfolio site, and a full-stack fitness tracker for 500+ users.

5 admin hrs/week saved70% faster confirmations500+ users served3x client interview rate
GoNext.jsTypeScriptPostgreSQLNode.jsFlutterAWSGmail API

Client Systems & Booking Platform

Mission

Design and deliver complete production systems for multiple freelance clients, owning the full lifecycle from discovery and architecture through deployment and handover.

Scope Delivered

  • Full project lifecycle ownership: scoping → architecture → development → deployment → handover.
  • Built a Go + Next.js booking application with Gmail API integration for operational automation.
  • Built and optimised JBaker.uk as a high-performance portfolio platform.
  • Built a full-stack fitness tracker serving a live user base.

Outcomes

  • Booking app: ~5 admin hours/week saved.
  • Booking app: 70% faster confirmation times.
  • JBaker.uk portfolio: 3x more employer attention.
  • JBaker.uk portfolio: interviews at 2 major firms.
  • JBaker.uk portfolio: 50% load time reduction.
  • JBaker.uk portfolio: 80% memory reduction.
  • Fitness tracker: 500+ users.

Delivery Notes

These projects required balancing cost, speed, and maintainability across different client constraints and environments. Keeping ownership end-to-end enabled faster iteration and clearer accountability for operational outcomes.

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