# Jonathan Mills

> Senior Software Engineer & Frontend Tech Lead. Senior engineer and team lead with 15+ years building and leading the teams behind products people use every day. Frontend specialist (Angular, React, Next.js, TypeScript) who has led teams of up to 8 frontend developers alongside testers, PMs and backend developers, and who also scopes work, runs meetings and talks to stakeholders. Currently improving a product used by 6,500+ people every day at Digistore24.

- Website: https://jmillsweb.dev
- Email: tech.jmills@outlook.com
- LinkedIn: https://es.linkedin.com/in/jonnymillsey
- Location: Spain
- CV (PDF): https://jmillsweb.dev/assets/Jonathan-Mills-CV.pdf

## Looking for
Senior frontend / full-stack engineer or tech lead roles, where technical depth and team leadership both matter.

## At a glance
- 15+: years shipping software, from design and animation into engineering and leadership
- 6,500+: people use the product I work on every day at Digistore24
- 8: frontend developers led at DXC, alongside testers, PMs and backend developers
- 14: client brands built for, from Amazon and the NHS to Aston Martin and Honda

## Experience
### Senior Engineer, Digistore24 DACH (Jul 2025 – Present)
Digital commerce platform; the website I work on has 6,500+ daily visitors.
- Built the React architecture that all legacy Angular and PHP pages now sit inside, so the platform can migrate one page at a time instead of being rewritten in one go.
- Developed the customer-facing buyer portal: buyers see their purchases through the website and update their own accounts.
- Built two of the platform’s largest onboarding features (the onboarding checklist and a config-driven seller wizard), which increased revenue, traffic and efficiency.
- Designed and shipped a role-based navigation (API, sidebar, profile and breadcrumb components, caching) that works seamlessly alongside the old navigation, behind GrowthBook flags.
- Introduced a new user type so a very large number of additional users can be onboarded while staying cleanly separated from existing account types.
- Built the design system: shared component and service libraries reused across React, Next.js, PHP and Angular, with a Figma to shadcn/ui to Tailwind pipeline and about 1,000 icons shipped as an icon font.
- Consolidated five redirect methods, called from over ten places, into one React endpoint, removing over 1,000 lines of code.
- Introduced tracking and experimentation with PostHog, GrowthBook and Hotjar so teams answer product questions with data.
- Delivered 139 tickets across 841 commits in 14 months, with output steady at roughly 50 to 115 commits a month.
Stack: Next.js, React, TypeScript, PHP, Tailwind CSS, PostHog, GrowthBook

### Frontend Angular Tech Lead, DXC Technology (Jul 2023 – Jul 2025)
Insurance platforms for the London Market.
- Led a team of up to 8 frontend developers, working closely with testers, project managers and backend developers.
- Acted as the team’s project manager: assigned tasks, scoped features and ran team meetings.
- Modernised software with Angular, TypeScript and NgRx; aligned frontend and backend schemas with the backend team.
- Presented feature progress to the wider organisation every two weeks in sprint demos.
- Mentored developers through code reviews and shared best practices; optimised Jenkins pipelines for smooth, reliable deployments.
Stack: Angular, TypeScript, NgRx, Jenkins, Jira, Confluence, GitHub

### Software Development Manager (promoted from Senior UI Developer), e-Track (May 2021 – Dec 2022)
Custom software for blue-chip clients including Amazon, the NHS and the Metropolitan Police.
- Managed a team of 4–5 spanning frontend developers, backend developers and DevOps.
- Scoped work and features, wrote up briefs, and worked directly with stakeholders and clients.
- Set standards for agile processes, deployments and QA.
- Promoted to Software Development Manager within seven months of joining as Senior UI Developer.
Stack: Angular, TypeScript, Jasmine, Jenkins, Jira, Confluence, GitHub

### Frontend Developer, Phoebus Software (Jul 2019 – Apr 2021)
Award-winning mortgage platform for financial clients including Legal & General, Pepper, Atom Bank and Paratus.
- Built the frontend for a mortgage platform for leading financial clients.
- Deepened testing experience with Jasmine and Selenium and CI with Jenkins.
Stack: Angular, TypeScript, NgRx, SCSS, Jasmine, Selenium, Jenkins

### Lead UI Designer (promoted from Web Designer / Developer), River Software (Apr 2014 – Jul 2019)
Bespoke software and business intelligence for high-profile brands including Aston Martin and Bentley.
- Designed and built responsive interfaces for employee engagement, learning and retailer business-intelligence platforms.
- Moved between visual design and working code end to end.
Stack: AngularJS, JavaScript, jQuery, SCSS, LESS, ASP.NET, SQL

## Earlier roles
- Multimedia Developer, Pennant International (Feb 2013 – Jul 2014): Technical e-learning courses for aviation students.
- Media Producer / Animator, Wiltshire Wildlife Trust (Oct 2010 – Apr 2011): Video, audio and 2D animation campaigns.

## Skills
- Frontend: Angular, React, Next.js, TypeScript, NgRx, Tailwind CSS, SCSS, shadcn/ui, Material, Bootstrap
- Product & data: PostHog, GrowthBook, Hotjar, A/B testing, Feature flags, Onboarding & activation
- Backend & tooling: Node.js, PHP, MongoDB, Jenkins, GitHub, Postman, SwaggerHub, Keycloak
- Testing & quality: Jasmine, Karma, Selenium, BrowserStack, Accessibility (ARIA, axe), Code review
- Leadership: Team leadership, Mentoring, Scoping & planning, Sprint demos, Stakeholder management, Jira & Confluence
- Design: Figma, Photoshop, Illustrator, Adobe XD, UI design, Responsive UX

## Education
BSc in 3D Computer Animation