Scope & technical assessment
Have an idea but no clear specification? I help map the current workflow, identify the problem, and decide what belongs in the first version.
Deliverables: an agreed scope, technical options, and development priorities.
Timothy Yu · Software Consulting & Development
App development. LINE integrations. Tools for your workflow.
I develop mobile apps and internal tools, from requirements and API integration to testing and handover. Over ten years of mobile development, with production work on wallets, real-time betting, and connected vehicle apps.
SERVICES
Development and technical consulting.
App development & improvements
Build a mobile app or improve an existing one: new features, API integration, troubleshooting, and performance work.
Deliverables: working software, agreed tests, and handover documentation.
LINE bots & workflow integration
Connect the tools you already use, reduce repeated data entry, or build a small internal tool for a specific workflow.
Deliverables: a bot, API integration, or an internal tool for the agreed workflow.
SELECTED WORK
App development and tools in practice.
Independent projects for life planning, family communication, and my development workflow. Each case describes the implemented features and my contribution.
Moment
Turn a life event into an editable preparation list.
Moment organizes preparation for trips, family activities, and other life events. Edit individual actions, save the plan, and return to its progress and next step. The screens show a picnic plan and its action editor.
MY WORKProduct planning, interface design, and app development
MomentPRODUCT WALKTHROUGH
01 / 03
See what needs preparing.
A picnic plan, its progress, and the next action.
02 / 03
Make the plan your own.
Edit each action before saving the list.
03 / 03
Return to the saved actions.
The saved list keeps both picnic actions together.
Family LINE Translator
Translate Chinese and Indonesian in the same LINE chat.
Built for everyday communication in my family. A Chinese message receives an Indonesian translation; an Indonesian message receives Traditional Chinese. Tested in personal chats and a family group. Access is limited to approved users and groups.
MY WORKTranslation flow, LINE webhook, and service integration
LINE BotPRODUCT WALKTHROUGH
01 / 02
Send Chinese. Read Indonesian.
Both directions, within the same LINE conversation.
中文早安
Bahasa IndonesiaSelamat pagi
02 / 02
Reply in Indonesian. Receive Chinese.
Both directions, within the same LINE conversation.
Bahasa IndonesiaTerima kasih
繁體中文謝謝
Development task monitoring
Inspect runs, checks, and recovery records from your Mac.
A macOS tool for my repository automation. Monitor shows task status; Runs opens execution details, checks, and error records. It helps locate a stalled task without searching through separate terminal windows.
MY WORKmacOS interface, status integration, and run inspection
Task monitorPRODUCT WALKTHROUGH01 / 03
Find the work that needs attention.
View running, ready, and blocked work together.
02 / 03
See where each task stands.
The graph groups tasks by their execution state.
03 / 03
Open the run behind the task.
Inspect its phase, Issue, and available runtime fields.
Project tasks & handover
Keep project progress, tasks, and decisions in one workspace.
An internal workspace for managing several software projects. Move from the project overview to work items, knowledge records, and decisions.
MY WORKRequirements, workflow design, and web development
Project workspacePRODUCT WALKTHROUGH
01 / 03
Start with the whole portfolio.
See project status and the work needing attention.
02 / 03
Keep the project context close.
Browse the knowledge records collected for each project.
03 / 03
Know what needs a decision.
Review pending decisions alongside their project context.
SELECTED COMPANY PRODUCTS
Production apps I helped build.
Selected contributions made as part of engineering teams across self-custodial wallets, real-time betting, and connected mobility.
01 / WALLET
Crypto.com Onchain
Owned iOS Earn across multiple blockchain protocols. Shipped staking, rewards, position management, and Buy & Swap for a self-custodial wallet.
- ~20K
- DAU during tenure
- iOS
- Ownership
- Multi-chain
- Protocols
02 / REAL-TIME
SportyBet
Built live odds, open bets, and betting-history synchronization. Prevented duplicated WebSocket updates across multiple betting slips and evolved legacy modules.
- ~100K
- DAU during tenure
- WebSocket
- Live state
- RxSwift
- Migration
03 / MOBILITY
KINTO
Delivered vehicle usage tracking, vehicle status, and in-app guidance for a connected vehicle application on a focused three-month production cycle.
- 3 mo
- Contract
- Vehicle
- Live state
- iOS
- Production
WORKING TOGETHER
From the first conversation to handover.
- 01
Understand the current workflow
Start with who uses it, how the work gets done today, and where it gets stuck. You do not need a finished specification to start the conversation.
- 02
Agree on scope and delivery
Decide whether you need technical advice or implementation, then agree on scope, deliverables, timeline, and fees before development starts.
- 03
Review working versions and hand over
Review working versions against the agreed criteria. Include the setup and handover information needed to use and maintain the result.
LET'S TALK
Discuss your app or workflow.
Include who will use it, the workflow or feature you need, any existing systems, and your target timeline. I can help define the scope and technical approach.