I build scalable backend systems for startups and companies that can't afford slow infrastructure. Based in Kansas City. 6+ years shipping production Go services, microservices architectures, and cloud infrastructure that handles real traffic.

If your backend is a slow, expensive to run, or understood by nobody left on the team, that's where I come in.

Backend Engineering Production-grade Go services, REST APIs, microservices architecture, and the CI/CD pipelines that make deployment boring (in a good way).

Cloud Infrastructure AWS, Kubernetes, and Terraform. I design systems for the traffic spikes you're planning for, not the ones you have today.

Performance & Modernization I profile critical paths, eliminate bottlenecks, and deliver a before-and-after report with real latency and throughput numbers. You pay for results.

MVP Builds for Startups From zero to production in 2–6 weeks. Scale-ready from day one.

Languages:     Go · Python · JavaScript / TypeScript
Backend:       Microservices · REST · GORM · Casbin
Infrastructure: Linode · AWS · Kubernetes · Terraform · Docker
Databases:     PostgreSQL · SQLite · Redis
Frontend:      HTMX · templ · React (when needed, not by default)

penbomb A Go HTTP handler that returns a 100 GB zip bomb to punish automated pentesting scrapers. Adapts payload based on the Accept-Encoding header. Blocks ~300 malicious requests per site per week at zero cost. Go Security HTTP

Winslow Electric — Digital Growth Built a full website for a local electrical company, then ran SEO, Google Ads, and Facebook Ads. Implemented analytics so ownership could see exactly which channels were driving customers. MVP delivered in 2 weeks. Go HTMX Bulma Google Ads

Metalmorphosis — Ludum Dare 35 Led a 5-person team to design and ship a 3D game in 72 hours. Unreal Engine Blender Game Design

I write about backend architecture, systems tradeoffs, and things I've learned shipping production software.

• Why HTMX is Replacing JavaScript Frameworks
• Your Password is a DOS Vector
• Monolith vs Microservices

→ Read all articles on kelyn.guru

I take on a small number of projects at a time. Fixed scope, fixed price — no hourly billing theater.

• Architecture & Strategy — Starting at $3,500
• MVP Build — Starting at $15,000
• Performance & Modernization — Starting at $8,000
• Fractional Backend Lead — $6,500/month

Every engagement starts with a 30-minute call. No pitch deck, no pressure.

→ kelyn.guru/work → kelyn.guru/contact

LinkedIn · kelyn.guru · Kansas City, MO