An employee-owned software and cloud architecture consultancy, founded and operated by former principal and staff software engineers from Google, Amazon, Microsoft, and Oracle. We modernize legacy architectures, engineer high-throughput data platforms, and integrate enterprise SaaS with zero downtime.
Our deepest engineering expertise, organized into the four domains where we deliver the most architectural impact for our clients.
Multi-cloud landing zone design, zero-downtime live migrations, auto-scaling Kubernetes orchestration, Infrastructure-as-Code (Bicep & Terraform), and Zero-Trust IAM architecture across AWS, Azure, GCP, and Oracle Cloud.
High-throughput streaming frameworks, low-latency shared-memory data exchanges, event-driven pipelines, multi-terabyte data ingestion engines, and real-time operational analytics dashboards.
Custom autonomous coding agents, Retrieval-Augmented Generation (RAG) pipelines, LLM-as-a-Judge benchmarking harnesses, prompt injection vulnerability testing, and automated synthetic test generation.
We engineer end-to-end SaaS products, responsive web applications, and interactive data dashboards. We also modernize legacy applications into cloud-based SaaS platforms, build custom enterprise extensions (including Dynamics 365), and develop secure API integrations with automated CI/CD pipelines.
Quantum Software Group is an employee-owned technology consultancy whose founding team brings over 35 years of senior engineering leadership directly from Google, Amazon, Microsoft, and Oracle.
We modernize legacy technology stacks, integrate with enterprise applications, and provide professional software design, custom implementation, and ongoing maintenance. We also design and build end-to-end AI and data pipelines, from ingestion and data lake architecture through model training and production inference, engineering for efficiency and cost alongside correctness at every stage.
No junior B-teams. Our founding principal architects directly write, review, and deploy your software. You receive tier-1 hyperscaler engineering discipline from day one.
100% Infrastructure-as-Code, automated CI/CD pipelines, comprehensive testing harnesses, and zero-trust security. Systems designed for 99.999% availability.
Incremental strangler-pattern refactoring, bi-directional API bridges, and zero-downtime database migrations that deliver immediate value without operational friction.
As an employee-owned business, every engineer advising you has a direct stake in the result. Clients get the depth of a seasoned consulting team with the agility of a boutique partner.
QSG delivers senior software engineering leadership to state and federal agencies to modernize legacy public systems, secure citizen portals, and automate data compliance.
QSG is active on the Texas Centralized Master Bidders List (CMBL) and registered for federal contracting on SAM.gov. State agencies, university systems, and federal departments can engage us directly for competitive bids and simplified procurement task orders in custom software development, cloud migrations, and legacy system modernization.
We partner with Tier-1 prime contractors holding master state and federal contract vehicles to help meet small business subcontracting participation goals. Our engineering team brings senior, hands-on execution for complex deliverables including distributed data pipelines, zero-downtime cloud cutovers, and secure API integrations.
We engineer software and cloud environments using established enterprise security principles: zero-trust identity and access management (IAM), data encryption in transit and at rest (mTLS/TLS), role-based access control (RBAC), and Section 508 / WCAG 2.1 AA accessibility standards for public citizen portals.
Limited Liability Company (LLC), Texas Small Business
541511 Custom Computer Programming Services (Primary)541512 Computer Systems Design Services541519 Other Computer Related Services518210 Computing Infrastructure & Cloud Hosting920-40 Programming Services, Computer (Custom Development)920-05 Application, Infrastructure, Hosting & Cloud Services920-64 System Implementation & Engineering Services920-46 Software Updating & Upgrading (Legacy Modernization)918-29 Computer Software ConsultingA selection of our case studies, drawn from engineering work our team has led across enterprise cloud, distributed systems, and AI.
Migrating an enterprise SaaS platform's entire infrastructure, including large-scale production databases, dependent services, and interconnected systems, from aging on-premises infrastructure to a modern cloud architecture, with strict zero-downtime requirements and hundreds of millions of active end users.
Led the architecture and design for the full systems transition, defining migration patterns for databases and services, rollback strategies, validation frameworks, and cloud-native synchronization pipelines to ensure continuity across all dependent services and integrations.
All production databases and dependent services successfully transitioned to cloud-based infrastructure with zero service disruption, zero data loss, and full backward compatibility across the platform.
Collecting, processing, and exchanging high-frequency telemetry across distributed virtual machine binaries with sub-millisecond latency requirements.
Built a high-throughput streaming framework using shared memory and event-driven notifications; engineered per-VM resource throttling policies to isolate noisy neighbors and maintain host stability.
Real-time telemetry processing across hundreds of thousands of nodes with zero host performance degradation.
Engineering teams across a large enterprise organization spent significant time on well-defined, repetitive code changes such as single-file edits, infrastructure configuration updates, and service onboarding tasks, all of which consumed real engineering hours but required minimal judgment.
Designed and built an autonomous coding agent that accepts task descriptions in natural language, independently writes code, runs automated test suites, and submits pull requests for mandatory human review. Implemented a multi-model strategy with a self-monitoring feedback loop that analyzes reviewer comments and iterates code automatically. The agent was validated through rigorous LLM evaluation benchmarking for safety, latency, and code quality.
Agent-generated pull requests grew from <1% to over 7% of total repository PRs within two months. Infrastructure configuration tasks that previously took a week of engineer time were completed in approximately 15 minutes with 90% first-pass accuracy, all with human review at every step.
Distributing software packages globally with strict cryptographic client authentication and tamper prevention requirements.
Built mutual TLS (mTLS) authenticated repositories behind a global CDN, migrated infrastructure to Bicep (IaC), and integrated Azure Private Link networking for end-to-end encryption and access control.
Secured enterprise package distribution against database tampering and unauthorized access across 25+ global publishers.
Whether you're an enterprise seeking cloud architecture leadership or a government agency looking for a technical engineering partner, we'd love to hear from you.