Dexter Marks-Barber

Software Engineering Manager at Veson Nautical

Engineering manager who leads 2 teams with 10 engineers in total. Grew AI-attributed commits from 0% to 95%. Self-taught engineer since the early 2010s, across agencies, occupational health, events, renewable energy, and maritime.

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Experience

Veson Nautical
- Software Engineering Manager
  
  Mar 2026 – Present
  - Led 2 teams with 10 engineers in total
  - Grew AI-attributed commits in Engineering from 0% to 95%
  - Improved SDLC across planning, code review, and releases
- Software Engineering Lead
  
  May 2024 – Mar 2026
  - Led a team of 5 engineers
  - Drove delivery of core initiatives
  - Worked with multiple disciplines to align goals
GivEnergy
- Software Engineer
  
  Nov 2023 – May 2024
  - Helped push mobile applications towards production readiness
  - Introduced manual test checklists that marked each mobile app screen red or green on real hardware
Beyonk
- Senior Software Engineer
  
  Apr 2022 – Oct 2023
  - Redesigned 10+ screens across embedded ticketing (calendar, ticket types, and merchandise) and the primary website
  - Implemented advanced event booking workflows
Optima Health
- Senior Applications Developer
  
  Dec 2021 – Apr 2022
  - Built a web team of 3 engineers from scratch
  - Mentored colleagues to bring them up to speed with Appian
- Applications Developer
  
  Sep 2020 – Dec 2021
  - Built advanced Appian workflows for medical relief
  - Helped recreate and modernise scheduling systems
Langley Foxall
- Intermediate Developer
  
  Oct 2019 – Oct 2020
  - Took charge of multiple client projects
- Developer
  
  Oct 2017 – Oct 2019
  - Learned new frameworks and technologies quickly
  - Worked on projects to meet client specifications and deadlines
Click Dealer
- PHP Developer
  
  Jan 2017 – Oct 2017
  - Implemented the damage-hotspot feature
  - Maintained core legacy systems

Projects

cmux · github.com/dextermb/cmux

2026

Terminal app that runs and supervises many Claude Code sessions at the same time

Go, Bubble Tea, MCP
needl.ee · Private source

2026

Cross-stitch progress tracker: upload a pattern, map its grid, and mark each stitch as you work it

Next.js, TypeScript, MySQL, Drizzle, AWS, Terraform
099.io · Private source

2026

Self-hosted services behind one single sign-on.
- auth.099.io – single sign-on with EdDSA tokens and refresh-token rotation
- status.099.io – meeting status board for family
- shopping.099.io – shared shopping lists with budgets and target dates
- todos.099.io – shared household todo list with blockers and routines
Go, Gin, GORM, htmx, Hono, Docker
Vitest coverage bug · github.com/vitest-dev/vitest/issues/11012

2026

Minimal reproduction of a merged-coverage bug, reported to and closed by the Vitest team

TypeScript, Vitest
deploy-api · Private source

2025

Deploy service that verifies GitHub push webhooks, pulls the repository, and restarts its Docker Compose stack

Go, Gin, go-git, Docker
git-admin · github.com/ninetynine/git-admin

2019 – 2021

Command-line tool to manage GitHub repositories, branches, collaborators, and branch protection. 25 stars on GitHub

JavaScript, Node.js, GitHub API
Small npm packages

2019 – 2020

Three small packages, published on npm
- npmjs.com/package/@ninetynine/call – helper that calls one function or many
- npmjs.com/package/@ninetynine/noop – no-op and comparison helpers
- npmjs.com/package/tw-ts – Tailwind plugin for text-shadow classes
JavaScript, npm
Early PHP open source

2018

Four small PHP projects, published on GitHub
- github.com/dextermb/framework – framework for JSON APIs
- github.com/dextermb/huddle – standalone collection helper library
- github.com/dextermb/ledger – mining ledger API for an EVE Online corporation
- github.com/ninetynine/shuttle – framework for JSON APIs, second version
PHP, Composer

Dexter Marks-Barber

Experience

Skills and Tooling

Projects

Education