Small team, senior engineers, no handoffs
We build high-availability software for organizations that operate under real constraints: security reviews, accessibility mandates, audit trails, and uptime commitments that do not bend.
Why we started
Our leadership spent years building consumer-scale platforms at technology companies where deployment speed was the whole game. We then worked alongside teams delivering mission-critical systems, where the priorities inverted: every change needs an audit trail, an accessibility review, and a rollback plan.
Most firms are fluent in one of those worlds. Rainier exists to be fluent in both: commercial delivery velocity with the documentation, security posture, and accessibility rigor that regulated environments require from day one.
We stay small on purpose. The engineers who scope your project are the engineers who build it, and we would rather turn work down than staff it thin.
We measure twice and cut once, then hand over a system your own team can maintain without us.
Four commitments we hold to
Strategic partner, not order taker
We push back when the requested technology is the wrong fit for the mission, and we say so during scoping rather than after invoice.
Compliance is a design input
Section 508, data sovereignty, and security frameworks enter the architecture at the blueprint stage, never as a remediation project later.
Conventional tools on purpose
We choose stacks your team can hire for and auditors recognize. Novelty is not a deliverable.
Knowledge transfer, always
Every engagement ends with documentation and handover sessions so your internal team can scale the platform independently.
Contracting credentials
Our certifications help prime contractors and agencies meet subcontracting goals while getting senior engineering on the work.
Who leads the work
Engineering leadership sits with the people doing the work. The technical direction is set once, at the top, and the team delivers to it. There is no account layer between you and the architecture decisions on your system.
Gianluca founded Rainier to bring commercial engineering standards to government missions. He has led distributed systems architecture handling millions of daily transactions at some of the most demanding engineering organizations in the industry, and sets the technical direction for every engagement Rainier takes on.
That expertise is what the team is built around. Gianluca and the engineers scope the problem together, agree the architecture before anything is built, and review the code that ships, so the standard set on the first call is the standard that reaches production.
Architecture, stack, and compliance decisions made up front and applied consistently across the team.
Leadership reviews the code that ships, rather than managing the delivery from a distance.
Documentation and knowledge transfer so your team runs the system without us.
Let's talk about your mission
Send us the scope, the timeline, and the compliance requirements. We'll tell you honestly whether we're the right team for it.