Secure, scalable systems for federal and state agencies
Rainier Software Solutions LLC is a Washington-based, principal-led software engineering firm delivering mission-critical systems to government missions, with senior engineers on the work from first call to handover.
Who we are
Rainier Software Solutions LLC is a Washington-based, principal-led software engineering firm delivering secure, scalable, and mission-critical systems to federal and state agencies. We bring an engineering pedigree from Tesla, Adobe, Snap, T-Mobile, and Starbucks to government missions, with zero communication overhead and direct expert execution.
Federal civilian agencies, plus Washington State and local governments requiring secure web systems, data platforms, and legacy modernization.
What we deliver
Full-stack application architecture
End-to-end development of secure, scalable web systems: expert back-end APIs, modern front ends, and AI-integrated interfaces.
Legacy system modernization
Incremental transformation of aging systems into modern, maintainable codebases. Zero business disruption, full continuity.
AI and data engineering
Private-cloud LLMs and Retrieval-Augmented Generation with data sovereignty and secure ETL pipelines.
Zero-trust cloud and DevSecOps
Automated infrastructure as code and container orchestration delivering audit-ready, multi-cloud environments from day one.
Compliance and accessibility
Architecture designed to facilitate NIST 800-53, SOC 2, and Section 508 / WCAG requirements, supporting streamlined ATO processes.
Full capability detail →
Stack, delivery model, and the accessibility frameworks we build against, in depth.
Five reasons agencies pick us
Principal-led execution
Every project is led by a technical veteran. Zero junior-developer overhead, and immediate expert problem solving.
Commercial-grade methodology
The high-velocity Agile and DevSecOps practices used by the most demanding commercial engineering organizations, applied to government missions.
Modular contracting
MVPs in weeks rather than years, so requirements are validated early and scope can pivot without financial loss.
Local Pacific Northwest partner
Based in Edmonds, Washington, with dedicated presence for Washington State and federal Pacific Northwest agencies.
Certified diverse supplier
DBE, MBE, and PWSBE certifications help prime contractors and agencies meet diversity subcontracting goals.
Delivered at scale, under scrutiny
Air Force scheduling portal
A flight scheduling and schedule-management system delivered under subcontract for a U.S. Air Force program, built to Section 508 and WCAG 2.1 AA across a twelve-month period of performance.
Read case study →Enterprise commercial engineering
Front-end and back-end architecture for Clover Health, Noonlight, Bully Pulpit International, Martian, and Ever, supporting consumer traffic at national scale.
All past performance →Tier-1 tech scale and security
Our engineers previously led distributed systems work handling millions of daily transactions at Tesla, Adobe, Snap, T-Mobile, and Starbucks, under rigorous data security requirements.
Certified diverse supplier
Contract details
| POC | Gianluca Vaccarini, Founder & Software Engineer |
|---|---|
| Address | 8201 202nd Place SW, Edmonds, WA 98026 |
| Phone | +1 (253) 314-6686 |
| gianluca@rainier.software | |
| Website | rainier.software |
| SAM.gov | Active |
| UEI | RGM1E2MJCBD9 |
| CAGE | 17PL6 |
| UBI (WA) | 606017771 |
| OMWBE Cert | M4M0031173 |
Where we contract
Take the capability statement with you
One page, print-ready, with certifications, NAICS codes, and registration numbers. Everything a contracting officer or prime needs for a submission package.