Lachlan Cotter Fractional Rails Engineer • SaaS Founder

Engineering foundations for small teams doing meaningful work

I'm Lach — I bootstrapped a SaaS business to 3,000+ customers. Now I help small teams create reliable, evolving platforms for meaningful work.

About me

I spent 14 years bootstrapping a SaaS platform to 3,000+ customers, processing $48M through Stripe, and keeping a production Rails system running smoothly through years of change.

Before that, I worked for a decade with startups and agencies across Australia and New Zealand, helping small teams ship ambitious products under real constraints.

Today, I partner with thoughtful teams building the next stage of their product — bringing calm technical leadership, strong engineering craft, and sustainable execution.

How I can help

I partner with growing product teams to provide senior full-stack engineering support — primarily in Ruby on Rails, relational systems, integrations, and modern front-end work.


Let's grab 15 minutes

I'd love to hear what you're working on and share a concrete plan for where I could add value over the next 4–6 weeks.

No lengthy process — just a quick conversation to see if fractional support could help you move faster as you continue to grow.

— Lach

Book a call Grab my resume