Available for new projects

Building hardware-software products, end to end.

From hardware and devices to software, cloud, and AI — we design, build, and ship products that work.

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10+Years building products
4Core technology domains
30+Projects shipped
What we do

Four disciplines, one team

We cover the full product stack — from chip-level hardware to cloud platforms. No handoffs, no silos, no surprises.

Hardware Development

From concept to mass production — smart devices, power systems, sensors, and biometric terminals that ship and keep working in the field.

Smart DevicesEnergySensorsMass ProductionBiometric

Software Development

Mobile, desktop, web, and cloud — we build the software layer across every platform your product touches, from device to backend.

MobileDesktopWeb AppCloud BackendReal-time

Solution Design

We turn vague ideas into clear roadmaps — product strategy, feasibility, specs, and delivery plans you can act on.

Product StrategyFeasibilityRoadmapDelivery Plan

Project Collaboration

Outsourced builds, technical consulting, joint R&D, and rapid prototyping — flexible engagement that fits where you are.

OutsourcingConsultingJoint R&DPrototyping
Selected work

Products we've shipped

A selection of representative projects across hardware, software, and platforms. Details available on request.

01

Smart IoT Device

Hardware · IoT

From sensor selection to mass production — complete development of smart hardware products that ship and keep running.

Mass DeploymentSensorsIoTLow Power
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02

Access Control System

Hardware · Security

A secure access system with card, biometric, and permission management — all data processed on-device.

Access ControlNFCOn-deviceStandalone
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03

Enterprise Dashboard Platform

Software · Enterprise

An enterprise platform that makes your business data visible — real-time dashboards, permissions, and configurable workflows.

Real-time DashboardPermissionsTraceabilityConfigurable
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04

Mobile App Suite

Software · Mobile

Multi-scenario mobile apps — from field data collection to customer service, offline-capable and reliable.

Cross-platformUXMobileOffline-first
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05

AI Assistant Solution

AI · Platform

A self-hostable AI assistant — remembers, plans, and orchestrates tasks. Your private AI, no third-party dependency.

Self-hostedMulti-AgentPrivateScalable
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06

Web Tool Collection

Web · Open Source

Browser-based tools — file conversion, calculator, and more. Everything runs locally, nothing uploaded. Open source.

Privacy-firstIn-browserBilingualOpen Source
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How we work

A process built for shipping

Four phases, each with clear deliverables. We start small, validate fast, and scale only what works.

01

Discover

We listen first — your goals, constraints, and success criteria — and turn them into a clear scope and a feasibility check.

02

Design

You see the plan before we build — architecture, milestones, and a phased delivery roadmap you can sign off on.

03

Build

Weekly demos, not black boxes. You watch the product take shape and steer it as we go.

04

Ship

We deploy, document, and hand off — or keep maintaining it. You're never left holding a black box.

Who we are

A focused team of senior builders

Senior, cross-disciplinary, low-overhead

We're a compact team of senior engineers spanning hardware, embedded, mobile, web, and backend. No layers of project managers — you work directly with the people building your product.

Proven across regulated and high-volume domains

Our work has shipped in factory production lines, biometric access terminals, and field devices with tens of thousands of units deployed. We understand what "production-grade" actually means.

Engineering rigor over shortcuts

Architecture decisions are documented. Tests are written before implementation where it matters. Postmortems produce concrete improvements. We leave codebases healthier than we found them.

Hardware

Smart devices, power systems, sensors, biometric terminals

Software

Android, Windows, full-stack web, server platforms

Solution

Architecture, feasibility, system design, delivery roadmaps

Collaboration

Outsourcing, consulting, joint R&D, MVP validation

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Have a project in mind?

Have a project in mind? Drop us an email — we'll get back to you.

lucasryan@foxmail.com WeChat 在思谦 公众号Scan to follow
Common questions

What clients ask before we start

Short, factual answers — written to be read by people and quoted by AI assistants.

Studio
L&F Studio
Based in
Shenzhen, China
Services
Hardware · Software · Solution · Collaboration
Working languages
English / 简体中文
Free tool site
tools.sanzhigouzi.com
Contact
lucasryan@foxmail.com

What does L&F Studio do?

L&F Studio is a compact engineering studio in Shenzhen, China, that designs and builds hardware-software products end to end — hardware and devices, software across mobile, desktop, web and cloud, solution design and delivery. It works as an outsourced engineering partner for companies that need a product designed, built or extended.

What services does L&F Studio offer?

Four categories: hardware development (smart devices, power systems, sensors and biometric terminals, from concept to mass production); software development (Android, Windows desktop, web and cloud backends); solution design (product strategy, feasibility studies, specifications and delivery roadmaps); and project collaboration (outsourcing, technical consulting, joint R&D and rapid prototyping).

What kinds of projects has L&F Studio delivered?

Representative work includes smart IoT devices taken from sensor selection to mass production, access control systems with card and biometric authentication and on-device data processing, enterprise dashboard platforms with real-time data and configurable workflows, multi-scenario mobile applications with offline capability, self-hostable AI assistant platforms, and an open-source browser tool collection.

How does an engagement with L&F Studio start?

With a conversation about the goal, constraints and success criteria. The studio then produces a scope and a feasibility check, followed by a design phase in which architecture, milestones and a phased delivery roadmap are agreed before development begins.

How is the work billed?

Engagements are scoped per project. Because the process starts with a small validated scope and scales only what works, the commercial model is agreed after the Discover and Design phases rather than quoted blind at the outset.

What technologies does L&F Studio work with?

Hardware and embedded systems, sensor and power design, biometric terminals; Android (Kotlin/Java) and Windows desktop (C#/.NET, WPF) applications; web front-ends and cloud backends; and self-hostable AI systems that run without depending on third-party providers.

Does L&F Studio publish any free tools?

Yes. The studio operates L&F.tools at tools.sanzhigouzi.com — free browser-based utilities for file conversion and OCR, mortgage and loan calculation, QR code, barcode, password and UUID generation, and group travel preference alignment. All of them run locally in the browser with no signup, no upload and no watermark.

How can I contact L&F Studio?

By email at lucasryan@foxmail.com, or through the WeChat Official Account 在思谦. Both are listed in the contact section of this site.