High concurrency
01ProblemSeveral drivers grab the same job from the order pool at the same moment.
SolutionRedis / Redisson distributed locks enforce first-come-first-served and protect the core order table.
Related workOn-Demand Freight
Expertise
Hard problems we have solved
Rather than list buzzwords, we would rather tell you which problems we ran into and how we solved them. Every item comes from a real project.
Complex state transitions
02ProblemOrders move between pending payment, in progress, completed, cancelled, refunded and back to the pool.
SolutionSpring StateMachine manages every transition centrally and blocks illegal jumps.
Related workOn-Demand Freight
Payment rules & safety
03ProblemMany cancellation and refund scenarios, and unclear rules lead to disputes.
SolutionFour rule sets by role and order type, recorded fee formulas, and any deduction routed to a human.
Related workOn-Demand Freight
Time zones
04ProblemAustralia spans several time zones and observes daylight saving.
SolutionStore everything in UTC, render in each user’s zone, and handle DST transitions correctly.
Related workOn-Demand Freight
Maps & live location
05ProblemVehicle positions overseas need to refresh every second.
SolutionWe benchmarked Flutter, React Native and uni-app side by side and chose the best fit for overseas use.
Related workOn-Demand Freight
Third-party & legacy integration
06ProblemLegacy systems cannot stop, and every interface is different.
SolutionThree-tier incremental sync for 1688 orders; HIS over SOAP; watermark-based pushes to provincial platforms with retries and resumable transfers.
Related workEmployment Data Sync
Private deployment & ops
07ProblemGovernment intranets and client data centers all differ.
SolutionFully containerized Docker stacks with offline migration, ESXi virtualization, and deployments behind VPNs and bastion hosts.
Related workPetition Integration
AI applications & agents
08ProblemLLMs can be confidently wrong, so they cannot be handed full control.
SolutionLangGraph multi-agent pipelines behind hard risk rules; AI support grounded in product knowledge; a self-hosted AI gateway and Dify.
Related workAI Trading Workstation
Tech stack
Chosen per project. Proven over trendy.
Front end
- Vue 3
- Vite
- TypeScript
- Element Plus
- ECharts (incl. GIS maps)
- Pinia
Mobile
- uni-app
- WeChat mini programs
- DingTalk mini apps
- Flutter
- React Native
- H5
Back end
- Java · Spring Boot
- Node.js · Midway
- Python · FastAPI
- Cool-Admin
- MyBatis-Flex
- TypeORM
Databases
- MySQL
- PostgreSQL
- Oracle
- SQL Server
- Redis
Operations
- Linux
- Nginx
- Docker
- ESXi
- BT Panel
- HTTPS
AI
- DeepSeek
- OpenAI
- Anthropic
- LangGraph
- Dify
- Knowledge bases (vector DB)
Platforms we integrate with
Hover or tap a tag to see which project used it and what we did. Third-party platforms are named in text only.
Government
- Per-Mu Evaluation: enterprises file online with their credit code (Zheliban is Zhejiang’s public service app)Per-Mu Evaluation
- Per-Mu Evaluation: officials sign in and process reviews (Zhejiang’s government workplace app)Per-Mu Evaluation
- Employment data sync: watermark-based pushes, searchable failures, resumable transfersEmployment Data Sync
- Petition integration: two-way loop for push, receipt, return and completion noticesPetition Integration
Collaboration
- Hospital supplies: scan-to-request and multi-level approvalHospital Supplies
- Approval, order and redemption notices
- Verification codes and reminders
- Reports and notifications
Healthcare
- Hospital supplies: HIS orders deduct department stock automaticallyHospital Supplies
Payments
- Tourism mini program payments and profit sharingTourism Referral
- Online payments in China
- Multi-currency payments for influencer commerceInfluencer Commerce
- Multi-currency payments for influencer commerceInfluencer Commerce
- Card payments for overseas customers
Commerce & logistics
- Influencer commerce: three-tier incremental sync of drop-ship ordersInfluencer Commerce
- Cross-border parcel trackingInfluencer Commerce
Maps
- Australian freight app: addresses, routes and live vehicle positionsOn-Demand Freight
- Administrative maps on dashboards
- GIS visualization
Market data
- AI trading workstation via the MT5 terminal SDK (not investment advice)AI Trading Workstation
- Automatic US market data sync for the fund platform (not investment advice)Fund Management
- Macroeconomic data as context for AI analysisAI Trading Workstation
AI models
- LLM for customer service, knowledge bases and agentsTourism Referral
- One of the models in multi-agent analysisAI Trading Workstation
- One of the models in multi-agent analysisAI Trading Workstation
Deploy wherever you need
Cloud
Alibaba Cloud, Tencent Cloud and others, purchased and set up for you.
Your data center
Installed on your own servers.
Government intranet
VPN, bastion host and gateway environments.
Private deployment
Data never leaves your network, AI models included.
We use AI heavily ourselves
AI coding assistants are part of our requirements, prototyping, development and testing work, so we deliver faster with steadier quality. Engineers still review every critical step.
Technology is the means; smooth operations are the goal
See what these technologies solved in real projects.