Doby Baxter

Systems-Focused Python Engineer • PLC • DevEx

I build tooling and systems that reduce errors, enforce valid states, and make complex workflows easier to understand and debug.

My work sits at the intersection of developer tooling, validation, and system reliability with a strong focus on preventing misconfiguration, improving error clarity, and making behavior predictable.

I’m particularly interested in how validation, input handling, and system design contribute to both software quality (QA) and security.

Technical Skills

Programming
Python · TypeScript · JavaScript · Bash · Node.js

Data & Configuration
JSON · YAML · JSON Schema Design · AJV Validation · Schema-Driven Architecture

DevOps & Tooling
Git · GitLab · GitLab CI/CD · Docker · PyPI · CLI Tooling

Validation & Reliability
Configuration Validation · Schema Design · Deterministic Workflows · CI/CD Integration · Invalid State Prevention

Browser & Extension Development
WebExtensions API · Firefox Add-ons · DOM Manipulation · MutationObserver · Tooltip Systems

Documentation & Communication
Technical Writing · Architecture Documentation · Open Source Collaboration · Async Remote Communication

PLC & Industrial Automation PLC Programming · Siemens TIA Portal · CODESYS · Ignition SCADA · Ladder Logic (LD) · Industrial Automation · Motor Control Systems · PLC Simulation & Debugging

Robotics & Middleware
ROS 2 · RViz · Distributed Systems · Real-Time Communication

Security & Systems Awareness
Input Validation · Secure Configuration Practices · Safe Parsing · Network Analysis (Wireshark, Nmap) · System Inspection & Debugging

Experience

Software Consultant (Independent)
Worked directly with clients to understand complex systems and reduce friction in development workflows. Focused on practical improvements in tooling, configuration, and system clarity.

ESA Pyxel · Open Source Contributor
Contributed to a scientific detector simulation framework, focusing on validation, reliability, and developer experience.

Connect with me

🟨 Portfolio: https://dobybaxter127.gitlab.io
🟪 Contact: https://dot.cards/dobybaxter127