We build and maintain software.
Full-stack applications, cloud infrastructure, AI-augmented platforms, and the bridges between legacy systems and modern ones. If it needs to run in production, we can build it.
# What we shipped this quarter
platforms = get_active() # 8
cron_jobs = count_scheduled() # 170+
uptime = measure() # 99.99%
for system in platforms:
system.keep_running()What We Build
Real systems in production. Here's the range.
Traffic Intelligence Platform
Real-time traffic data processing across multiple hardware vendors. FHWA-compliant travel time analytics, near-miss safety detection, and EPA emissions tracking. 170+ automated data collection jobs running 24/7 across multi-region AWS.
Construction Management SaaS
Multi-tenant platform handling project management, quoting, and financial workflows. Full accounting integration, payment processing, document signing, and an offline-first mobile app for field crews. 36 Django apps, one codebase.
CRM & AI Operations Platform
CRM with a workflow engine, AI-powered agents, automated content generation, and marketing sequences. LLM orchestration for customer intelligence and operational automation.
Innovation & R&D Dashboard
IP browser, guided research journeys, SBIR grant tools, and analytics for R&D ecosystems. Full-text search across patent and publication databases with workflow orchestration.
Autonomous Code Foundry
AI-driven development pipeline that accepts build proposals and runs them through a 16-state process to produce tested code on isolated branches. Three async queues handle planning, generation, and validation.
Distributed Intelligence System
Self-hosted, 12-machine distributed platform with knowledge graph, vector search, and time-series analytics. 167 automated collectors, local LLM inference on dedicated GPU hardware. Runs autonomously.
Multiplayer Game Platform
Real-time card and board games with matchmaking, ELO ratings, and leaderboards. WebSocket-driven gameplay with server-authoritative state and async background processing.
Galaxy Simulation Engine
Democracy-driven space simulation with seasons, faction politics, AI citizens, and emergent narratives. Complex state machines governing galactic events and player-driven governance.
Self-Hosted Infrastructure
NVR with AI object detection across security cameras, self-hosted map tile servers (PostGIS + vector tiles), dynamic DNS, and bare-metal compute for local ML inference.
What We Do
The specific things we're good at
Full-Stack Development
Django, FastAPI, React, React Native. We build web apps, APIs, mobile apps, and the infrastructure underneath. PostgreSQL, Redis, Celery, Elasticsearch — the full production stack.
Cloud Architecture
AWS infrastructure at scale. Multi-region deployments, auto-scaling, S3, RDS, ElastiCache, CloudFront. We design it, deploy it, and keep it running.
Legacy Modernization
We keep systems running that others won't touch, then modernize them incrementally. No big-bang rewrites. Your system stays up while we build the replacement underneath.
AI & LLM Integration
Local inference on dedicated hardware, API orchestration with Claude and OpenAI, autonomous agent pipelines, knowledge graphs, and vector search. Not chatbot wrappers — real system integration.
Integration & Data Pipelines
Connect systems that were never meant to talk to each other. REST APIs, webhook handlers, ETL pipelines, and real-time data processing. We've wired up QuickBooks, Stripe, DocuSign, and dozens of proprietary vendor APIs.
Ongoing Maintenance
We don't just build and leave. We maintain, monitor, patch, and evolve systems over years. 170+ automated processes running across our platforms, and we answer the page when something breaks.
How We Work
We Ship Production Code
Not prototypes, not proof-of-concepts. Systems with real users, real data, and real uptime requirements. Eight platforms currently in active production.
We Own the Full Stack
From bare-metal Linux servers to React frontends. Database design, API architecture, deployment pipelines, monitoring — we don't hand off to another team mid-project.
We Document Everything
You'll never be locked in to us. Every system we build comes with the architecture context, deployment procedures, and operational knowledge to run it without us.
We Stay Technical
No project managers between you and the person writing the code. You talk directly to the engineers building your system.
About Us
LegacyCoder is a Denver-based software engineering shop. We build full-stack web applications, cloud infrastructure, AI-augmented platforms, and the integration layers that connect legacy systems to modern ones. We've been writing production code for over 15 years across construction, transportation, R&D, and enterprise operations.
Our stack is opinionated: Django and FastAPI on the backend, React on the frontend, PostgreSQL for data, Celery and Redis for async work, and AWS for infrastructure. When the project calls for it, we run our own hardware — including GPU compute for local LLM inference and self-hosted services.
8+
Platforms in Production
170+
Automated Processes
15+
Years Shipping Code
Let's Talk
Have a system that needs building, fixing, or modernizing? Tell us about it.
contact@legacycoder.com
Phone
+1 (720) 767-3986
Location
Denver, CO