Lachlan Cox

Intelligent transport systems for government, councils and infrastructure contractors, first as a contractor and now full time. The through-line is deploying technology that protects people and assets on the road: school-zone crossings, over-height protection for bridges, tracking vehicles across state borders that may be carrying undisclosed livestock that could be carrying pathogens, and catching heavy vehicles running several times over their limit. I reverse engineer low-level sensor hardware where the vendor APIs fall short, write the software that drives it and processes the raw data, and build the backends for multi-site rigs of sensors, cameras and signage running over genuinely terrible comms. I also prototyped a machine-vision pipeline that classifies vehicles from roadside cameras, plus a Raylib labelling tool to feed it training data. The work spans the whole stack: Go, PHP, JavaScript, C and Python, on-site embedded units and AWS deployed with Terraform, all of which has to talk to and hold up the rest.

Go / PHP / JavaScript / C / Python / AWS / Terraform / embedded / Modbus TCP / machine vision / Raylib

I wrote Tillered's network-acceleration core, including an automated QoS layer that tunes congestion-control to live link conditions. I also rebuilt the product into a decentralised, airgapped system that can be driven by a custom infrastructure-as-code format, supporting up to a hundred nodes that self manage and reconcile state between each other. Along the way, I wrote a custom WireGuard implementation that adds layer-2 bridging ontop of the layer-3 protocol; a host firewall and routing built ontop of kernel netlink and nftables; cryptographic licensing systems, and offline-capable OAuth + OpenID Connect (OIDC) provider with MFA. I've also had to build and design the systems/pipeline to ship the product with custom RHEL images, terraform deployments and designing/building the active company website. I also served as Director from 2022 to 2026.

Go / WireGuard / CRDTs / Protobufs / nftables / AWS / Terraform

Worked as a solo dev for a team of financial advisers. Migrated thousands of records out of legacy CRMs into Salesforce with an automated validation pass to prove nothing was lost or corrupted along the way, designed a custom client-lifecycle pipeline in Lightning Web Components, and built a React + Flask tool that bundled client documents for review-and-sign with programmatic PDF signing and a full audit log.

Salesforce / Lightning Web Components / React / Flask / Python

Worked in a team helping with devops and security on their production powershell applications and automations. Then worked as a solo developer when they found out I knew how to write C#.NET when they didn't. This put me on an internal automation portal project for technical sales staff, wrapping Nokia's NFM-P API over both REST and SOAP. It exposed provisioning of layer-2 Epipe and layer-3 VPRN services through a clean frontend, replacing the manual NFM-P workflows the team had been doing by hand via calls and emails with NSP support.

C#.NET / React / Nokia NFM-P / REST / SOAP