Mathieu Lomax
Senior Full-Stack Developer
Remote-first senior full-stack developer with 9+ years delivering production web apps and owning end-to-end delivery (discovery → build → deployment). Specialised in modern product front-ends (React/Next.js, TypeScript) and robust back ends (Node.js, C#/.NET, relational databases), with a track record of turning ambiguous requirements into clean, scalable implementations and raising engineering standards through strong review and practices.
Experience
LMTY - AI Business Analysis
Full-Stack Software Developer · November 2024 – Current
Foundling LLM-powered business research SaaS
Incubator-style, engineering-led discovery: rapidly prototyped and iterated on an LLM-driven research platform, shipping end-to-end features while the product direction evolved through continuous experimentation and user feedback.
Principal front-end developer
- Owned the entire Next.js App Router front-end, leading SSR-first routing, reusable layout patterns, and performant client composition across the product – Next.js, React, TypeScript, Tailwind
- Built form-heavy product flows with strict schema validation, resilient error handling, and highly reusable UI state patterns – Typescript, React Hook Form, Zod
- Shipped authentication and identity UX including OTP and email verification – Auth.js, Better Auth, React Email, Resend
Primary shared-platform developer
- Led the shared package used across apps, delivering typed domain models, database utilities, and common API contracts – TypeScript, Drizzle ORM, Zod, PostgreSQL
- Built out the core vector-enabled data structures and utilities used by both API and UI layers – PostgreSQL + pg_vector, Drizzle ORM, AWS S3, Database Optimization
Secondary back-end & DevOps contributor
- Contributed to LLM workflow and orchestration features, pairing with backend owners to extend graph-based pipelines – LangChain, LangGraph, OpenAI, OpenRouter, Firecrawl
- Contributed to building the project toolchain and infrastructure, including automated CI/CD pipelines and deployment workflows – AWS SDK, Docker, DevContainers, Biome.js, PNPM, Turbo
Rio IT Ltd
Lead Full-Stack Software Developer · April 2021 – November 2024
Full-Stack Software Developer · December 2019 – April 2021
Bespoke Solutions
- Lead Developer on numerous customer projects, managing every step from early-stage project meetings and calculating estimates to post-delivery training and ongoing maintenance and support.
- Developing and maintaining 10+ client initiatives in fast-paced agile / scrum and waterfall environments – C#, RESTful APIs, ASP.NET MVC, OOP architecture, SignalR, jQuery, HTML, SCSS, MySQL, SQL Server, database optimization
Leadership
- Technical lead / SME for front-end technologies, researching, prototyping and rolling out new engineering and redesigning the existing i18n system for SPAs – Redux, Storybook, responsive web design, Vite, Webpack, ESLint, Chromatic, JWTs, bundle optimization
- Managing and mentoring teams of 1 – 3 junior developers per project, leading code reviews, reviewing Git pull requests, providing constructive feedback and ensuring adherence to best practices.
Innovation
- Developing an internal TypeScript/React component monorepo with 50+ reusable components and interactive Storybook, extensive theming with modular CSS variables, and custom React hooks for form handling, validation, permissions and i18n handling – TypeScript, React, Storybook, CSS variables, React hooks, form handling, validation, permissions, i18n handling
- Refactoring and extending internal multi-layered C# .NET libraries – ORM caching, JWTs, OAuth, tiered permission system, MySQL and SQL Server data adapters, data auditing, S3, Azure Storage, automated CI pipeline
- Developing a new internal documentation site – Astro SSG, MDX, Fuse.js, automated CI/CD pipeline
- Developing internal tooling for scaffolding new projects and generating boilerplate – Node.js, Express, React SSR, Recoil, Tailwind
DevOps / SysOps
- Provisioning Linux servers using RHEL / CentOS / Rocky on cloud servers for multiple staging environments – AWS, EC2, Linux, encrypted storage provisioning, MySQL, Apache, LetsEncrypt, Cron
- Provisioning a high-availability cluster for an in-house public-facing project – AWS, EC2, S3, ELB, CloudFront
- Building numerous scripts for automating DevOps tasks, code publishing and server deployments – Bash, PowerShell, C#, JS
Communication
- Collaborating with BAs and directly with product owners to define software requirements and prioritize hotfixes and new features.
- Providing technical support to non-technical customers and third-party developers, onboarding and training.
Freelance
Copy-Editor / Proofreader · January 2017 – November 2019
- Working on many English-language articles / books / annual reports / academic papers across varied subject matters for numerous international companies, from basic proofreading (spelling, punctuation and formatting) to full copy-editing (factual correctness, logical continuity and consistent writing style).
Realty.com
Senior Software Developer · September 2016 – January 2017
- Developing an in-house product for housing rental listings for a US-based start-up with automated health monitoring, financial / activity graphing for an all-in-one admin dashboard – PHP, jQuery, C#, micro-services, Elasticsearch, AWS, EC2, ELK logging stack
- Provisioning and managing a containerized, high availability and redundant server cluster with automated zero-downtime deployments, multiple staging environments and on-demand scalability across multiple bare-metal servers and cloud hosting providers – Ansible, Puppet, Docker, HAProxy, VRRP, GitHub Actions, AWS
EasyRent LLC
Software Developer · May 2015 – September 2016
- Developing an in-house public-facing product for housing rental management for a US-based start-up – PHP, jQuery, C#, micro-services, RabbitMQ, ElasticSearch, EC2, ELK logging stack
- Implementing customer subscriptions, payment handling and financial metrics reporting.
MediPen Ltd
Software Developer · February 2015 – May 2015
- Developing a bespoke e-commerce platform within very limited time constraints – PHP, CakePHP framework, jQuery, PayPal, MySQL
- Developing an admin back-end with staff management, product dispatch wizard, and integration with third-party package printing hardware.
Personal Projects
- WireMod a mod for the game Terraria, inspired by the excellent WireMod for Garry's Mod – C#, XNA Framework
- LocalDNS an open-source dynamic DNS system – DNS protocol, JS, Koa, MongoDB
- Various media library management tools – C#, WinForms, Bash
Education
University of Wales, Trinity St David
September 2012 – July 2014 Software Engineering – HND / Associate Degree Vocational qualification focusing on practical modules over the purely theoretical Algorithms & Data Structures, Critical Systems, Networking, Web Development, Desktop Development, Databases, Analysis & Design, 3D Development, Distributed Systems
Petroc College
September 2010 – July 2012 Computing, Maths, Philosophy – A Level
Professional Skills
UK and Belgian citizen, legal resident of Portugal, with full rights to work in the UK and EU.
Languages: English (native), French (native), Portuguese (beginner).
Software: Git, Visual Studio, Slack, Teams, Word, Excel, Photoshop.
Member of Mensa.
Full UK driving license.
References
Available on request.