Complex systems.
Done right.
We work as partners, not vendors - bringing engineering rigor and care to build custom software that gives your business a lasting competitive edge.
What we do
We build systems that last, and fix the ones that don't.
Custom Development
End-to-end product delivery from concept to production. We build complex web applications and platforms designed to last years in production.
System Architecture
Strategic design for systems that need to scale and evolve. Technology selection, service boundaries, data modeling, and infrastructure are planned for maintainability from day one.
Applied AI & Automation
Embed LLM features, retrieval, and workflow automation without breaking reliability. Guardrails, evals, and observability included.
Complex Integrations
Connect disparate systems without fragile code. Payment processors, auth providers, CRMs, ERPs, and custom APIs - robust, tested, and built to hold.
Product Development
Make the right thing, then make it intuitive. We lead product thinking and UX alongside engineering so that the system actually works the way users expect.
Rescue & Modernization
Take over projects that have stalled, or modernize systems that have outgrown their architecture. We stabilize, migrate, refactor, and ship without starting from scratch.
Why Arx Modus
Because engineering quality compounds over time.
Senior-level execution
Every engineer on your project has years of production experience across multiple industries. No junior developers learning on your budget, no handoffs to offshore teams.
Product sense
We push back on specs that don't serve the user. Technical decisions are always informed by what the product needs to achieve, not by what's easiest to build.
Consistent delivery
Every project we've taken on has shipped. We communicate proactively, surface problems early, and maintain the lowest incident rates across all engagements.
Selected work
View all projectsVertro Platform
Mission-critical configuration platform for industrial HVAC - calculation engine, configurator, blueprint generation, custom ERP. 7+ years in production, 1,500+ companies, 8.9/10 user rating.
Nextdocs
AI platform that generates and maintains technical documentation from source code. Full codebase analysis in ~15 minutes, auto-updates on every merge, 100+ hours saved per project. 400+ projects documented.
The process
What to expect
A straightforward process built around your outcome.
Foundation
Your success is our absolute priority. Everything from architecture decisions to how we organize work serves one goal - results for your business. Requirements, timelines, and processes follow from that, not the other way around.
Discovery call
A 30-minute conversation about your project, constraints, and goals. No pitch deck, just an honest assessment of whether we're the right fit.
Technical proposal
Within a week, you receive a detailed scope: architecture approach, technology choices, timeline, and cost. We explain every decision so you can evaluate it - or challenge it.
Kickoff & planning
Work begins with a shared roadmap and a fixed communication rhythm. You'll see working software early and often, not just status reports.
Delivery and handoff
You get production-ready code, documentation, and infrastructure. You own everything - and we stay available long-term if you need us.
Frequently Asked Questions
Common questions about how we work and what to expect.