Mobile product
Built the Angular and Ionic experiences for live recording, athlete and team management, tournament workflows, match review and analytics.
01 · Overview · JAHIZ Analytics · Cross-platform sports product
From live match to useful insight.
JAHIZ helps coaches and athletes record matches, manage athletes, teams and tournaments, review event history, and turn recorded activity into practical performance insights.
Match recording, athletes, teams and tournaments share one mobile product context.
- Role
- Software Engineer & Equity PartnerSole technical developer across the Angular/Ionic application, Node.js APIs, PostgreSQL data flows, analytics workflows and cross-platform delivery.
- Status
- Cross-platform beta · Android closed testing · iOS reviewBusiness, branding and sport-domain decisions were developed with product partners.
Screens use approved fictional data. No production athlete, coach, team or tournament data is shown.
02System story
Record once. Use the data beyond the match.
Match activity has to be recorded quickly without turning competition into a data-entry exercise. JAHIZ keeps capture focused, preserves every event as structured history, and reuses that history for review and analysis.
Fictional match · Bout 03
- 01
Mobile input
One scoring action is recorded.
A focused scorer captures side, value and match time once—at the moment the action happens.
- Status
- Input · accepted
- Signal
- AO · +1 · 08:42
- 02
Immediate state
The live score responds now.
The match state updates optimistically while the event remains visibly pending.
- Status
- Pending · local
- Signal
- AO 3 · AKA 2
- 03
API persistence
The same event is acknowledged.
The API validates and stores the event, replacing temporary state with a trusted server identity.
- Status
- Confirmed · EVT-2841
- Signal
- 201 Created
- 04
Match history
Continuity survives the bout.
The confirmed action joins the chronological match record without being entered again.
- Status
- Stored · 08:42.17
- Signal
- Event 14 of 27
- 05
Analytics
One action becomes context.
The same structured history can support athlete, team and tournament insight after the match.
- Status
- Athlete · team · tournament
- Signal
- Scoring rate +12%
03What I built
What I built across the product
Backend and data
Designed the Node.js and Express APIs, PostgreSQL data flows and structured event history connecting live activity to later review.
Delivery
Managed Capacitor integration, Android testing and release work, and iOS builds through Codemagic, TestFlight and App Store Connect.
Role boundary · Sole technical developer; business, branding and sport-domain decisions were shared with product partners.
04Engineering decisions
Keeping live state reliable
One source of truth for the match
- Problem
- Timer, score, penalties and event history can drift when each part is managed independently.
- Decision
- Model the live match as one typed state with explicit event transitions.
- Result
- The interface, backend record and review timeline remain consistent.
Immediate feedback without hiding failure
- Problem
- Waiting for every network response makes live recording feel slow.
- Decision
- Update the interface optimistically while keeping pending, retry, rollback and removal states explicit.
- Result
- Interaction remains immediate without pretending failed persistence succeeded.
Mobile lifecycle without duplicate work
- Problem
- Cached Ionic views can re-enter while existing timers or subscriptions are still active.
- Decision
- Separate route-entry hydration from component lifetime, centralise timer ownership and bind cleanup to lifecycle boundaries.
- Result
- One reliable timer remains active and stale listeners do not duplicate work.
System path
- Angular · Ionic · NgRx
- Node.js · Express
- PostgreSQL
- Capacitor · Android · iOS
05The product in use
The product in use
01 / 03
Live recording
Large touch targets and a clear timer keep entry focused while the match is active.
02 / 03
Match review
Recorded activity becomes a chronological history that can be inspected after the match.
03 / 03
Analytics
Completed match data supports performance views without inventing unsupported ratings.
Screens use approved fictional or synthetic data. No production user data is shown.
JAHIZ turns time-sensitive match activity into structured information that remains useful after the live session ends.