Point of sale
Web POS with a customer display, receipt printing, discount codes and loyalty points at the counter.
POSPromotionsLoyalty
handytech open for new jobs independent team
We build business software, multi-channel selling, data, mobile apps and the servers under them, for one shop or a chain of fifty.
What do you need?
Tap one and we'll point to similar things we've already built.
featured work
Four projects, told with the full technical detail and illustrations.
E-commerce
Packing camera as proof
Marketplace buyers claim a box arrived empty or wrong. Now every order has a photo from the packing table, and the clip is ready a few seconds after you look it up.
30 s one frame per packing table Read the technical story E-commerceOne place for every marketplace's stock
The real stock lives in the ERP, not on the marketplaces. Every day the system compares, suggests a safe number, and pushes it to Shopee and TikTok Shop with a single file upload.
4×/hour stock map rebuilt Read the technical story Data and AIAbout 40 AI assistants, one per person
Every member of staff has their own AI assistant in the company chat. It does real work in the ERP with that person's own permissions, and every conversation is traced.
~40 assistants, one per person Read the technical story DevOpsMongoDB 4.4 to 8.0 without stopping sales
Four major versions and two OS replacements, on a live database cluster serving a whole retail chain. The stores kept selling the entire time.
4 major versions: 5.0, 6.0, 7.0, 8.0 Read the technical storybusiness solutions
10 solutionsA tailor-made ERP for retail and production chains, with 70+ modules in daily use. Take the whole suite or pick the parts you need.
Recruitment and HR
Applicants, interview slots, shifts, leave, overtime, pay by grade and KPI, monthly reviews.
HRMShiftsPayroll
Warehouse
Purchasing, receiving, location-based picking, transfers and stock counts. AI helps explain stock gaps.
ReceivingPickingStock count
CRM and order tracking
Customers, membership tiers, points-fraud detection, order tracking, complaints and Google reviews.
CRMLoyaltyOrders
Production and packaging
Product recipes, raw-to-finished conversions, cartons and barcode label printing.
RecipesCartonsZPL labels
Accounting, invoices and tax
MISA AMIS integration, e-invoices issued from cash registers, tax-code lookup, bank statement reconciliation.
MISA AMISE-invoiceBanking
Delivery
Book Ahamove and Lalamove from the ERP, track drivers, reconcile fees, define delivery zones.
AhamoveLalamove
Internal chat with AI bots
Threaded, real-time team chat where AI bots answer and do work right inside the conversation.
MattermostAI bots
Training and skill tests
Moodle courses, skill exams and training documents with an AI assistant to answer questions.
MoodleOnline exams
Smart stores
Fridge temperature sensors, electricity meters and camera health checks, with alerts when something's off.
IoTAlerts
e-commerce
9 solutionsSell on every marketplace, manage it all in one place.
Shopee and TikTok Shop
Orders, returns, wallets, payouts and statements flow into the ERP. Connection tokens refresh themselves.
ShopeeTikTok Shop
One-stop stock sync
The ERP is the source of truth. A daily comparison suggests a safe number, pushed to Shopee and TikTok Shop with one file upload.
Multi-channelStock
Technical detail
Pancake and Facebook
Pancake orders into the ERP, a nightly catalog sync (price, image, description), and a browser extension for page moderators.
PancakeFacebook
Meta Ads and Google Ads
Daily reports, alerts and human-approved optimisation, plus product catalogs for ads.
Meta AdsGoogle Ads
Packing camera
Snap each packing table every 30 seconds, read the shipping label to attach the photo to the order, and cut the clip from the recorder when a buyer complains.
CameraBarcodesProof of packing
Technical detail
Cross-channel promotions
Discount programmes by product code, running in stores and on marketplaces at the same time.
Promotions
Competitor tracking
Record competitors' prices and products on marketplaces so you can react in time.
PricingMarketplaces
Zalo Mini App and ZNS
Order inside Zalo, with ZNS messages for order status.
ZaloZNS
Websites and landing pages
Fast, SEO-ready storefronts with a CMS the marketing team can edit themselves.
Next.jsAstroStrapi
data and AI
8 solutionsNumbers you can trust, and AI that does real work instead of demos.
Metabase dashboards
Install, permissions and dashboards so management can check sales, stock and staffing themselves.
Metabase
Data warehouse
ClickHouse, PostgreSQL and MongoDB, synced from the ERP in near real time.
ClickHousePostgreSQLMongoDB
End-to-end ETL
Pull data from marketplaces, ads, banks and accounting. Scheduled, monitored, and alerting when a job stops.
ETLSchedulingAlerts
An AI assistant per person
About 40 assistants in the company chat, working in the ERP with each owner's own permissions.
LLMMCPERP CLI
Technical detail
AI in operations
Product recognition from photos, a sales chatbot, stock-gap explanations and feedback-photo scoring.
VisionChatbot
LLM observability
Every conversation traced, with cost, latency and errors tracked per assistant.
Langfuse
Sales forecasting
Pace tracking and peak-season forecasts to plan stock and staff.
Forecast
Vietnamese search
Full-text Vietnamese search for chat, products and documents.
OpenSearchElasticsearch
apps
6 solutionsMobile, web and desktop, shipped and maintained for the long run.
Staff app in Flutter
Shifts, tasks, photo reports, push notifications. One codebase for iOS, Android and web, released automatically with fastlane.
Flutterfastlane
Customer app in React Native
Shopping, loyalty points, order tracking. Several brands share one Expo monorepo.
React NativeExpoTypeScript
Zalo Mini App
Shopping and loyalty mini apps that run inside Zalo, nothing to install.
ZMABun
Push notifications
OneSignal, Zalo ZNS and SMS for staff and customers.
OneSignalZNSSMS
In-store apps
Desktop client, scales and printers over serial ports, QR-code sign-in.
DesktopSerialQR
Internal web apps
Recruitment forms, performance reviews and an HR portal shared across brands.
Vue 3React
devops
8 solutionsServers, backups, monitoring and security. We get paged when something breaks, so you don't.
Self-run infrastructure
16+ servers in two regions, no hyperscaler lock-in, and a regional failover plan.
DebianCaddyDocker
CI/CD
Gitea, Drone CI, a staging copy rebuilt nightly from real data, one-command deploys.
GiteaDrone CI
Always-on databases
MongoDB replica sets and Redis Sentinel. We took MongoDB from 4.4 to 8 without stopping sales.
MongoDB 8Redis
Technical detail
Backups you can rewind
PostgreSQL restorable to the minute, MongoDB backups restored as a test, kept on object storage.
WAL-GPBMR2
Monitoring and alerts
Uptime, host metrics, 30 days of central logs, job-queue heartbeats, alerts in chat.
Uptime KumaBeszelVictoriaLogs
Network and security
Private mesh network, zero-trust login, central secrets, same-day vulnerability patches.
TailscaleCloudflareInfisical
Self-hosted tools
Chat, LMS, wiki, BI, secrets and Git, running on your own infrastructure.
MattermostMoodleOutline
Edge and email
Cloudflare Workers, Pages, email routing and R2 storage.
WorkersPagesR2
how it goes
No long decks. A short chat, then working software.
- ChatTell us what's slow, broken or missing. Half an hour is usually enough.
- ScopeWe send back what we'd build, how long it takes and what it costs.
- ShipYou see working pieces every week, on a staging copy first.
- Keep it runningWe stay on for monitoring and fixes, or hand it over with a run-book.
got a job for us?
Send a few lines about your business and what's bugging you. We reply within one working day.