React Native JSI Deep Dive — Part 12: Production Debugging and Pitfalls — Why Did It Crash and How Do You Find Out?
A SIGSEGV in production gives you a wall of hex addresses, mangled C++ symbols, and three threads pointing…
read more →Engineering with heart.
Independent software engineering studio. We build applications, systems, and infrastructure — from mobile apps to distributed systems and performance-critical code.
Engineering, products, and knowledge.
Engineering Services
We design and build production-grade software across the stack.
Applications
- Mobile (React Native, iOS, Android)
- Frontend systems (React)
Backend & Infrastructure
- APIs and distributed systems
- Real-time systems
- Cloud and self-hosted infra
Systems Programming
- C++ and performance-critical code
- Media pipelines (audio/video)
- Memory and perf optimization
Specialized Domains
- WebRTC and real-time comms
- Peer-to-peer systems
- Cryptography and security
We work on problems where architecture, performance, and correctness matter.
Products
We build our own technology — applications, developer tools, infrastructure systems, and experimental products.
Products let us explore new ideas and push beyond client constraints.
Technical Writing
Deep engineering content based on real systems we build — distributed systems, mobile architecture, React Native internals, and P2P architectures.
We write to explain how systems actually work.
Teaching & Webinars
Live sessions and workshops on systems engineering, P2P architectures, React Native internals, and performance optimization.
We teach the concepts we use every day — from fundamentals to advanced system design.
We are not limited to a specific stack or domain — we choose the right tools for the problem.
Built to explore.
heartIT is an independent engineering studio focused on building serious software without compromise. We work across the stack — from user-facing applications to backend systems and low-level performance-critical code.
We have deep expertise in areas like real-time systems, peer-to-peer architectures, and distributed systems, but we are not limited to any single domain.
Inspired by the Heart Pirates, we operate as a small, independent crew: exploring new technologies, building original systems, and sharing knowledge openly.
No unnecessary complexity.
No shallow engineering.
Just well-designed systems.
Technical Expertise
Core Engineering
- React Native / iOS / Android
- React
- Redux / Sagas
- Tailwind CSS
Backend
- Node.js / TypeScript
- Python
- API design
- Distributed systems
Systems & Performance
- C++
- Bare runtime
- Performance optimization
- Memory-efficient systems
Real-Time & Networking
- WebRTC
- Peer-to-peer networking
- DHT systems
Infrastructure
- Linux / Bare Metal
- Docker
- Git
- Self-hosted systems
Cryptography & Security
- Noise Protocol
- XSalsa20 / Poly1305
- Merkle Trees
- Ed25519
Holepunch Stack
- Hypercore
- Hyperswarm
- Autobase
- Protomux
Selected Work
Product · Beta
OurPot
Local-first shared expense ledger for households. Peer-to-peer sync, end-to-end encrypted, built on the Holepunch stack.
learn more →
Performance
High-Performance Video Pipeline
React Native + Metal. Real-time video processing with native GPU acceleration.
P2P Infrastructure
Holepunch Stack Applications
Peer-to-peer infrastructure using Hypercore, Hyperswarm, and Autobase.
Real-time
WebRTC Communication Systems
Real-time audio and video communication with custom signaling and media pipelines.
The right fit.
01
Startups & Founders
Building core products or exploring new architectures from the ground up.
02
Engineering Teams
Working on complex systems that need senior-level execution and deep technical expertise.
03
R&D Projects
Prototyping new technologies, building proof-of-concepts, or solving hard engineering problems.
Latest Writing
We write about systems we build and technologies we explore.
React Native JSI Deep Dive — Part 11: TurboModules vs Pure JSI vs Pure C++ — Which Native Module Approach Should You Use?
React Native now offers three ways to build native modules: TurboModules with codegen and type safety, pure JSI…
read more →React Native JSI Deep Dive — Part 10: Building a Storage Engine — Can You Build MMKV from Scratch?
AsyncStorage serializes every read through the bridge. MMKV delivers sub-millisecond key-value access by memory-mapping a file directly into…
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