Skip to content Leigh Bertelsen

// web developer · principal-level · accessibility

Building things that work for everyone.

17 years of full-stack experience across fintech, e-commerce, nonprofits, and wellness. I love getting a high-level overview of what a business needs and then running with it from planning to execution, because that amount of ownership and responsibility is where I do my best work.

Senior Web Developer

50+
nordic financial institutions
2M+
end users on the platform

I'm part of the team building and evolving a core banking platform across the Nordic region. Within that, I led the company-wide accessibility initiative from start to finish: defining the WCAG 2.2 AA compliance standards, architecting and implementing automated accessibility testing into the Azure DevOps CI/CD pipeline at every stage from IDE to unit tests to integration tests to end-to-end to CI, training the team, and guiding implementation across all digital products. The goal was to make accessibility a required and painless part of how the team already works, and that's what it has become. Beyond that initiative, I consistently perform at 4x code delivery while maintaining a high standard for code quality, regularly lead refinement discussions, and assist in the hiring and mentorship of other developers.

You don't need to know how it works.
You just need to know what you want.

I've spent much of my career working with business owners, yoga teachers, authors, nonprofits, and wellness practitioners; people who had a clear sense of what they wanted their web presence to feel like, but no idea how to get there technically. That's the gap I close. Tell me the vibe, the goals, the audience you're trying to reach, and I'll translate that into something that works beautifully, performs well, and actually sounds like you. The number one thing clients tell me afterward is that I delivered more than they expected, faster than they thought possible. That's not an accident. I have a knack for immediately gathering the information that matters, and I care deeply about people's time.

A recent example: yogasoleil.dk, a site for a practitioner who does massage, yoga, and youth mentoring. She knew it was important to have a web presence but had no idea where to start technically. We worked through what her business needed, and what came out was a site that works as a real marketing tool, is easy for her to navigate and update, and genuinely sounds like her. We're still building on it together.

She not only thinks at a high level but also delivers concrete results.
— Jesper Mårtensson former manager, Skandinavisk Data Center
  • "She has a unique ability to see the big picture while being incredibly thorough and detail-oriented in her daily work. This combination makes her both reliable and highly effective."
    Pernille Thyssen Senior Test Specialist, Skandinavisk Data Center
  • "Finding a developer with a keen sense of design and user experience is very rare and important. I think Leigh is a diamond in the rough as far as developers are concerned. She brings more than programming to the table."
    Ann Meneses Senior Designer, Himalayan Institute
  • "I trust her because she took the time to understand me and my work. She did it all with love, and I really felt that."
    Evey Kochanek Nutritionist and Business Owner
  • "Her passion for accessibility isn't just talk either; she truly builds with everyone in mind."
    Elvis Carlos Pesconi Junior Senior Web Developer, Skandinavisk Data Center
  1. September 2023 to present · Copenhagen

    Skandinavisk Data Center

    Senior Web Developer, Platform and Website Lead

    I'm part of the team building and evolving a core banking platform that spans more than 50 financial institutions across the Nordic region, touching the online banking experience of over 2 million end users. Within that, I led the company-wide accessibility initiative from start to finish: defining the WCAG 2.2 AA compliance standards, architecting and implementing automated accessibility testing into the Azure DevOps CI/CD pipeline at every stage from IDE to unit tests to integration tests to end-to-end to CI, training the team, and guiding implementation across all digital products. The goal was to make accessibility a required and painless part of how the team already works, and that's what it has become. Beyond that initiative, I consistently perform among the highest in the team across architecture, delivery, code quality, and mentoring.

  2. June 2007 to present · Remote

    Neptune Illume

    Founder and Senior Web Developer

    Full-stack web development and design studio serving clients across wellness, education, and nonprofit sectors. Services span user research, content strategy, UX/UI design, wireframing, build, database integration, and hosting, alongside email and social media marketing, SEO, brand development, and analytics. Selected clients include Rinchenshop.com (multilingual DE/EN Shopify store with event registration, GDPR-compliant analytics, and WordPress content feed), Yoga International, Chattra Yoga, Nikki Estrada, Pacific Yoga, and others across the wellness and education space.

  3. October 2015 to January 2017 · Honesdale, PA

    Himalayan Institute

    Web Development Manager, Creative Services

    Led the planning and execution of a complete rebuild of the Himalayan Institute's website and Global Humanitarian Projects website. Directed content, branding strategy, implementation, and QA testing across all web projects, working with the Creative Services department, department heads, and the broader community. Revitalised the branding of all digital and print materials with a new style guide based on customer-driven marketing strategy. Built front-end interfaces and data-driven interactive elements including the Wisdom Library subscription service. Also built the website for the Institute's health centre, PureRejuv, and ran technology training within the Creative Services department.

  4. July 2020 to September 2021 · Remote

    Yoga International

    Marketing Specialist

    Drove a 73% increase in paid memberships through data-driven course creation and conversion-focused email campaigns to an audience of 800,000 to 1,000,000 subscribers. Produced approximately 50 online courses in Contentful, built corresponding landing pages in HubSpot with A/B-tested copy and CTAs, and analysed acquisition and conversion data in Google Analytics to inform ongoing strategy. Role ended following company acquisition and restructuring.

  5. August 2017 to January 2019 · Remote

    SystemArchitecture.NET

    Software Developer and UX Consultant

    Built and evolved application and website platforms for multiple clients across full-stack .NET, C#, SQL, and PHP/WordPress. Designed user experiences, engaged with clients to collect conceptual framework and business needs, and led marketing and branding strategy projects.

  6. November 2010 to May 2012 · Princeton, NJ

    Bristol-Myers Squibb

    Senior Developer, Marketing

    Lead developer on BMStudio's first in-house touchscreen presentation, which the sales team described as the best presentation they had ever seen. Developed touchscreen closed-loop promotions for PC and iPad using Exploria's e-detailing platform, 3D graphics and animations, ActionScript 3, JavaScript, XHTML, and CSS.

  7. August 2013 to October 2015 · Plymouth Meeting, PA

    Health Advocate

    Senior Interactive Developer, Marketing

    Developed marketing websites, a custom blog, interactive tools, and animations, as well as established metric reporting for a healthcare benefits company.

  8. May 2010 to October 2010 · Pottstown, PA

    General Physics

    Developer

    Designed and developed custom eLearning solutions including GUI shells, web-based courses, simulations, online games, and quizzes. Developed style guides and templates.

  • 2015 Platinum Hermes Creative Award, Category: Blog (overall)
  • 2015 Gold Hermes Creative Award, Category: Pro Bono
frontend
  • React
  • TypeScript / JavaScript
  • Next.js
  • Astro
  • HTML5
  • CSS3
  • Tailwind
  • UX Wireframing
backend & data
  • Node
  • PHP
  • C# / ASP.NET
  • SQL
  • REST
  • GraphQL
platform & a11y
  • Azure DevOps
  • CI/CD
  • WCAG 2.2 A-AAA
  • Accessibility
cms & analytics
  • Optimizely
  • Google Analytics
  • Contentful
  • HubSpot
  • Magento
  • WordPress
  • Shopify
  • Liquid