Embedded firmware
& mobile apps,
engineered end to end.
We're the team you bring in for embedded Rust firmware and cross-platform mobile apps, and we build the web and backends around them too. Everything ships fast, gets reviewed properly, and is owned 100% by you.
AI speed, engineered quality.
We use AI to accelerate the repetitive 80% of engineering — then our developers review, test and refactor every change. You get the velocity of AI without the unmaintainable mess it leaves behind in the wrong hands. Our way of working is simple: pilot fast, learn from real usage, and double down on what works — rather than over-planning every detail up front.
AI-accelerated delivery
AI handles the repetitive 80% of the work for us: scaffolding, boilerplate, tests, migrations, docs. That frees our engineers to spend their time on the parts that actually need a human. Work that used to take weeks takes days.
Engineer-reviewed quality
A senior engineer reads, tests and refactors everything AI writes before it ships. We're especially strict about this on firmware. Your device has to run in the field for years, so the code that drives it has to survive a proper review.
Everything your product needs, in one place.
Embedded firmware and mobile apps are our specialism, and we build the web and backend that go around them. With one team on every layer, nothing falls through the cracks between vendors and you don't lose weeks to handoffs.
Cross-platform mobile apps
We build iOS and Android from a single codebase using Flutter and Kotlin / Jetpack Compose Multiplatform. The apps feel native because they behave like it, and you get them faster and cheaper than building two separate ones.
Embedded firmware in Rust
Embedded firmware is the work we do best. We write it in Rust for sensors, wearables and radio devices that need to sip power and keep running for years in the field, long after anyone last touched them.
Web applications
React and Next.js dashboards, SaaS products and customer portals. Fast, type-safe and built to rank.
Backend & APIs
Go and Rust services that hold up under load. gRPC, Kafka, Postgres and Mongo, from your first user to your millionth.
AI-accelerated
Built quickly with AI, then reviewed and tested by people.
One team for the whole product
Firmware, mobile, web and backend, all under one roof. Nothing gets lost in a handoff, and if something breaks between layers there's only us to fix it.
Firmware, apps and the full stack — in depth.
Built by one team, from the device through to the backend. Here's how we approach each layer, starting with the two we know best.
Cross-platform mobile apps
iOS and Android from one codebase, built with Flutter and Kotlin / Jetpack Compose Multiplatform. The apps look and behave like native, ship faster, and cost far less to maintain than two separate apps.
Memory-safe firmware, from sensor to signal.
Your product is only as good as the code on the chip, and a firmware bug out in the field usually means a recall rather than a quick patch. We write firmware in Rust, which rules out whole categories of memory bugs, for low-power sensors, wearables and radio devices that have to keep running for years without anyone touching them.
Read: Why Rust for embedded developmentBoard bring-up and production firmware across the chips you actually ship on.
Rock-solid connectivity and pairing across short- and long-range protocols.
Secure firmware-over-the-air with signed images, A/B partitions and safe rollback — so the fleet stays current and recoverable.
µA-class sleep currents, power profiling and duty-cycling that turn a coin cell into years of battery life.
Sensor and peripheral drivers on bare-metal or RTOS, plus app- and cloud-side integration so the whole stack speaks one language.
Secure boot, signed images, encrypted storage and hardware-backed crypto — protection designed in from the first commit.
Modern tools, chosen on purpose.
Chosen for performance, safety and longevity — across embedded firmware, mobile, backend, web and the infrastructure that ties them together.
FlutterKotlinDart
React
Next.js
TypeScript
Tailwind
RustFlutterKotlinDartReactNext.jsTypeScriptTailwindRust
Go
PostgreSQL
MongoDB
Redis
Kafka
Docker
Kubernetes
Git
Grafana
GraphQLGoPostgreSQLMongoDBRedisKafkaDockerKubernetesGitGrafanaGraphQLA technology partner, not a vendor.
Maybe you're a hardware team shipping a connected device, a founder testing an MVP, or a company modernising an old app. Either way, you get one team that owns the result from start to finish.
We're specialists
- ✓Plenty of agencies add firmware to a web shop as an afterthought. We came up the other way, doing embedded Rust and cross-platform mobile from the start.
- ✓You get people who already know this work, so you're not funding their learning curve.
One team for the whole product
- ✓Firmware, mobile, web and backend, all built by the same team. Nothing gets lost in a handoff.
- ✓Because one team owns the result, there's nobody to point fingers at but us.
You own everything
- ✓Your source code, firmware, docs and IP are yours from day one. No lock-in.
- ✓We'll sign an NDA, and we don't sneak in dependencies you can't swap out later.
Fast, without the mess
- ✓We move quickly with AI, then review and test every change by hand.
- ✓You get working releases each week and a codebase your team can keep building on.
New studio. Not new to this.
Appspire is new. The people behind it aren't. We've spent years building embedded firmware, mobile apps, and the large-scale backends behind them — whether you need just one of those or all three working together, it's familiar ground for us.
We're senior engineers growing a team, and we use AI to get more done without cutting corners. Someone senior reviews every change before it ships, and you walk away owning all of it.
The Appspire Sprint
From idea to a working prototype in two weeks. A fixed-scope, fixed-price sprint where we turn your core concept into something real and clickable — AI-accelerated, engineer-reviewed — so you can test it, show investors, and decide on the full build with evidence, not guesswork.
We don't take every project.
We'd rather be honest than busy. When you reach out, we take the time to understand your requirements and ask one question first: can our team deliver real value here? If we can, we go all in. If we can't, we'll tell you straight away — with the reasons why, and a pointer toward someone better suited.
We assess fit first
- ✓We dig into your goals, constraints and timeline before we ever talk scope.
- ✓We honestly weigh whether we're the right team to deliver it.
We tell you straight
- ✓If we're not the right fit, you'll hear it from us immediately.
- ✓No drawn-out pitch, no over-promising just to win the work.
We point you onward
- ✓When it helps, we guide you toward a studio or team that's a better match.
- ✓The right outcome matters more to us than the contract.
The result: we work with only a handful of clients at a time — as their long-term tech partner, not a vendor juggling a dozen projects.
Work with us, your way.
Pick the model that fits your stage — and switch as you grow.
Dedicated Team
An embedded squad that scales with your roadmap — best for evolving products and long-term builds.
Fixed Scope
A defined deliverable on a fixed timeline and budget — ideal for a well-shaped MVP or a clear milestone.
Staff Augmentation
Plug our specialists — mobile, firmware or backend — straight into your existing team.
Questions, answered straight. no jargon, just answers ✦
Yes. It's what we do best, and we don't subcontract it. We write production firmware in Rust for ESP32, STM32 and Nordic nRF, including BLE, Sub-GHz, FOTA and low-power work. If your product has a chip in it, this is the work we enjoy most.
Flutter and Kotlin / Jetpack Compose Multiplatform. One codebase covers both iOS and Android and still feels native. It ships sooner and costs less to maintain than building two separate apps.
You do, completely. The source code, firmware, docs and IP are all yours, with no lock-in. You can bring it in-house whenever you like.
Always, and before we get into anything sensitive. Your idea and your IP stay yours from the first conversation.
Usually within a week or two of the first scoping call. We give you a realistic timeline up front rather than an optimistic one just to win the work.
We quote a fixed scope in writing after a short discovery call. If there's a simpler or cheaper way to get you what you need, we'll say so, even when it means less work for us.
Short sprints and working software you can actually use each week, not status decks. With hardware that means firmware you can flash and test on your own boards as we go.
Hardware teams shipping connected devices, founders testing an MVP, startups scaling up, and companies modernising older apps. If we're not the right fit, we'll tell you and point you somewhere that is.
We stick around. We handle firmware updates, support and new features, and since you own everything, you're free to take it elsewhere whenever you want.
We're Appspire Labs Private Limited, based in India and working with clients across time zones. We schedule calls and demos around your hours.
Let's build something that ships.
Tell us what you're building. We'll come back within one business day with how we'd approach it — and a no-pressure consultation.
No account managers or sales scripts — you'll speak with the people who will actually build your product.