Battle-tested engineers who build production platforms fast, and fix the prototypes that shouldn't have shipped.
Simplex is a software development company specializing in building clean, scalable, and maintainable systems. We believe the best solutions are often the simplest ones.
Four things we do exceptionally well.
We specialize in web technologies, cloud infrastructure, and API design. Our team has experience across various industries in both commercial and government spaces.
AI Pipelines
From training infrastructure to production inference endpoints. We design end-to-end AI systems that handle real throughput — not demo-scale workloads. No glue code, no duct tape.
- LLM integration and fine-tuning pipelines
- Streaming inference and low-latency serving
- Vector databases and retrieval-augmented generation
- Evaluation frameworks and observability
Geospatial & Data Systems
High-volume spatial data pipelines, real-time event streams, and data-heavy backends. We've shipped systems that ingest, process, and serve big data at production scale.
- Spatial data ingestion and transformation
- Real-time streaming, processing, and event-driven data
- High-throughput API design for data-heavy clients
- Cloud-native data warehousing and analytics
Production Builds from Zero
Blank repo to deployed, observable platform. We build the architecture your Series A investors want to see — not the one that collapses under your first 10k users.
- Architecture design and technology selection
- Full-stack development with CI/CD from day one
- Mobile-first, cloud-native, scalable by default
- Handoff-ready documentation and runbooks
Prototype Rescue & Modernization
That MVP that got traction before it was ready? We've seen it before. We diagnose the structural debt, stabilize the system, and rebuild what needs rebuilding — without stopping the business.
- Legacy system audit and technical debt assessment
- Incremental migration without big-bang rewrites
- Performance and reliability hardening
- Security remediation and compliance readiness
How we engage.
We offer a range of services tailored to help you build and scale your software systems effectively.
Custom Software Development
Full-stack application development using modern frameworks and best practices. We build web applications, mobile backends, and internal tools that solve your specific business needs.
Web Application Architecture
Design and implementation of scalable web architectures. We help you choose the right technologies and structure your applications for growth and maintainability.
API Design & Integration
RESTful and GraphQL API design, implementation, and integration. We build robust APIs that are well-documented, versioned, and easy to consume.
Technical Consulting
Strategic technical guidance for your products. We review architectures, audit codebases, and provide recommendations to improve your development practices.
Cloud Infrastructure
AWS, GCP, and Azure infrastructure setup and optimization. We handle deployment pipelines, monitoring, and security to keep your applications running smoothly.
Code Review & Optimization
In-depth code reviews and performance optimization. We identify bottlenecks, security issues, and opportunities to improve code quality and system performance.
Rapid, embedded, no surprises.
We operate like a founding team member: embedded in your context, moving fast, and owning outcomes — not billing hours.
Discover
Rapid technical assessment of your codebase, architecture, and constraints. We align on scope, risk, and priorities before writing a single line. No wasted sprints.
Build
Embedded in your team with daily async updates and weekly syncs. We ship working software in short cycles. You see progress, not Gantt charts.
Harden
Every system we deliver ships with CI/CD pipelines, structured logging, alerting, and infrastructure-as-code. Observability and security hygiene are not afterthoughts.
Hand off
Your team owns the code. We document the architecture, train your engineers, and structure the handoff so nothing is a black box. No lock-in, no dependency on us.
The principles behind every decision.
We took everything we learned about what works — and what doesn't — and distilled it into four rules we don't compromise on.
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Simplicity over complexity
We choose the straightforward solution even when the clever one is tempting. The codebase you can understand in six months is worth more than the one that impressed everyone in the code review.
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Quality over speed
We build it right the first time. Speed comes from not having to undo bad decisions — not from cutting corners that turn into production incidents six months later.
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Clarity over cleverness
Readable code is maintainable code. We write for the engineer who inherits the system at 2am during an incident — not the one who gets to demo it.
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Communication over assumptions
We ask questions and stay aligned. Most project failures are communication failures wearing the costume of technical failures. We'd rather have an awkward conversation early than a painful one late.
Products we've shipped.
A sample of what we build when we put these principles to work. Products we've designed, engineered, and deployed.
Fairweather
Plan your road trip with weather forecasts along your route. Real-time weather data, route-aware forecasting, and a clean mobile-first interface.
NextWeek
The minimalist task planner for developers who want to ship. Focus on this week, plan the next, and keep the rest in the backlog.
Persona AI
Create a lifelike AI version of yourself that learns from your guidance — so your clients can interact, learn, and engage with your digital presence directly.
Client case study coming soon
Detailed case study with architecture overview, challenge, solution, and outcomes.
What you get with senior engineers.
Junior teams ship features. Senior teams ship systems. Every engagement includes the full stack of production-readiness — not just the happy path.
Production Architecture
Cloud-native, separation of concerns baked in, scalable from day one. AWS or GCP, designed for the traffic you'll have in 18 months — not just today.
CI/CD Pipelines
Automated testing, deployment, and rollback. Every merge to main goes through linting, unit tests, integration tests, and staged rollout. You ship with confidence.
Observability
Structured logging, metrics, alerting, and dashboards from day one. You always know what your system is doing, where it's slow, and what's about to break.
Reliability Engineering
SLA-aware design, graceful degradation, retry logic, circuit breakers. Systems that stay up and degrade gracefully when dependencies fail.
Security Hygiene
Secrets management, IAM least-privilege, input validation, dependency auditing, and secure defaults. Not a checkbox — a baseline.
Architecture Documentation
Runbooks, architecture decision records, system diagrams, and onboarding guides. Your future engineering team will be able to operate and extend the system without us.
The questions founders usually ask.
Typically a scoped sprint or an ongoing embedded retainer. We start with a discovery week to align on scope, architecture, and risk. Then we move to weekly shipping cycles with daily async updates. We scope work into clear milestones with defined deliverables — no ambiguous "hours burned" billing.
We price by scope and outcome, not hours. Think of it as a fractional CTO plus a senior engineering pod — lower risk and cost than hiring too early. Reach out and we'll discuss what a scoped engagement looks like for your situation.
Most engagements kick off within 1–2 weeks of contract signature. We don't carry idle bench capacity — when we commit to an engagement, we're fully in. Discovery typically starts within days of alignment.
100%. You own all code, systems, and IP produced during the engagement — full stop. No proprietary lock-in, no "you need us to run this" dependencies. The handoff is structured so your team can operate, extend, and maintain everything we build.
Yes. We have experience delivering in government-adjacent and regulated environments. We understand compliance requirements, documentation standards, FedRAMP-adjacent security expectations, and the procurement reality of public sector work.
A structured handoff: architecture documentation, runbooks, and engineer onboarding sessions. Many clients continue with a lightweight retainer for ongoing advisory, incident support, or future sprints. But the system runs fine without us — that's the point.
You need to ship. Let's talk.
Whether you're starting from zero or inheriting a prototype that's holding you back, we can help. Tell us what you're building.