- Blockchain & Web3
Arxium
Layer 0 blockchain node
A Rust proof-of-stake node for the Layer 0 network. It runs as a validator, a full node or a bootnode.
- Rust
Software engineering studio
We build software that proves its own quality.
Web platforms, mobile apps, cloud systems, AI integrations and Web3 products, designed and engineered by one accountable team.
Selected work
Capabilities, proven through real products.
From blockchain infrastructure and cloud services to web platforms and native mobile apps, each project demonstrates a different part of how we engineer software.
- Blockchain & Web3
Retracer
Indexer & Data Layer
Indexes chain data into Postgres and exposes blocks, actions and address history through a unified API.
- Rust
- PostgreSQL
- Web Platforms
Arxium Website
Public product website
The public website for the Arxium network. It introduces the network and its products and links into each of them.
- Next.js
- TypeScript
- Web Platforms
Explorer
Public blockchain explorer
A public interface for blocks, actions, addresses, assets and validators, updated live as blocks are indexed on the Arxium network.
- Next.js
- TypeScript
- Go
- Cloud & DevOps
Retracer Cloud
Hosted node and data access
Hosted access to Arxium nodes and indexed chain data. One endpoint and one API key, so an application does not run its own indexer.
- Blockchain & Web3
- Web Platforms
Arxium Console
Accounts, learning and devnet issuer tools
A web application for accounts, learning and devnet issuer workflows. Issuer actions started here can be approved in the Arxium wallet on iOS.
- Next.js
- TypeScript
- Mobile Apps
Arxium mobile wallet application
Mobile wallet · iOS & Android
A native self-custody wallet for transfers, staking and Arx ID.
- Swift
- Kotlin
Capabilities
One team. Every layer required to ship.
From product design to production infrastructure, Quantum Stack brings the disciplines required to turn complex ideas into reliable software.
Web Platforms
SaaS products, portals and high-performance web applications engineered for maintainability and growth.
Mobile Apps
Production-ready mobile experiences with reliable architecture, native integrations and thoughtful interaction.
AI Integration
LLM features, retrieval, agents and automation integrated into real product workflows with practical controls around quality and cost.
Cloud & DevOps
Cloud architecture, CI/CD, infrastructure and observability designed to make shipping safer and operations easier.
Product & UI/UX
Research, UX architecture, prototyping and design systems shaped around how the product actually works.
Blockchain & Web3
On-chain and off-chain systems, integrations and infrastructure engineered with the same production standards as the rest of the product.
Engineering standard
Quality engineered into every layer.
Quality is not a final QA step. It is designed into the system through testing, observability, security, repeatable delivery and deliberate engineering review.
Testing
Automated checks at the right levels help catch regressions before they reach production.
Observability
Logs, metrics and traces make system behaviour visible when software leaves the development environment.
Security
Architecture, access controls and dependency hygiene are considered as part of implementation, not added afterwards.
Delivery
Repeatable build and deployment workflows reduce manual risk and make releases easier to understand.
Reliability
Systems are designed around failure, recovery and operational visibility rather than ideal conditions alone.
Review
Code, architecture and acceptance criteria are reviewed deliberately before important changes move forward.
The diagrams are conceptual. They illustrate each practice, not a specific client system.
How we work
From idea to production.
A clear process keeps product decisions, engineering decisions and delivery aligned from the beginning.
Discover
Understand the product, users, technical constraints and success conditions before committing to implementation.
Typical outputs
- Project brief
- Scope
- Technical discovery
- Risks
- Initial architecture
Design
Turn assumptions into something testable and make the important product and architecture decisions early.
Typical outputs
- UX flows
- Prototype
- Interface direction
- Architecture decisions
- Delivery plan
Build
Ship working software in short, reviewable iterations.
Typical outputs
- Production code
- Tests
- Preview environments
- Reviews
- Documentation
Ship & Scale
Deploy safely, observe real behaviour and improve the system as requirements and usage evolve.
Typical outputs
- Deployment
- Monitoring
- Handover
- Optimization
- Ongoing support, when part of the engagement
The stack
Modern tools, chosen deliberately.
We choose technology around the product, the team and the operating constraints, not around a fixed agency template.
Frontend
- TypeScript
- React
- Next.js
Mobile
- Kotlin
- Swift
Backend & systems
- Go
- Rust
- Node.js
- PostgreSQL
Cloud & infrastructure
- Cloudflare
- Docker
- GitHub Actions
- Ansible
- Prometheus
- Grafana
The studio
Engineering without the handoffs.
Quantum Stack is a software engineering studio bringing product thinking, software development and infrastructure into one accountable team.
Good software depends on more than code. Product decisions affect architecture. Architecture affects delivery. Delivery affects reliability.
We keep those decisions connected.
Own the outcome
Responsibility should not disappear between design, engineering and deployment.
Make decisions visible
Important product and technical trade-offs should be explicit, reviewable and understandable.
Build for what comes next
Software should be maintainable and operable after the first release, not only impressive on launch day.
Start a project
Have something worth building? Let's engineer it.
Tell us what you're building, where the project stands today and what needs to happen next.
We'll come back with a direct technical perspective and a clear next step.
Start a project