Hi, I’m Dan, a software engineer with 18+ years of experience building web and mobile applications across the full stack. I’ve shipped products for brands across media, education, retail, and technology, with a strong focus on accessible, scalable interfaces and robust engineering practices. I enjoy collaborating with product and design teams to turn complex problems into delightful user experiences using modern JavaScript/TypeScript, React, Node, and cloud-native tooling. I’ve led open-source accessibility initiatives, migrated pipelines to CI/CD, and mentored engineers while contributing to open-source front-end tooling and performance improvements. I’m passionate about performance, testing, and maintainable code, and I love helping teams adopt agile methods and tooling to ship value quickly and reliably.

Danyal Aytekin

Hi, I’m Dan, a software engineer with 18+ years of experience building web and mobile applications across the full stack. I’ve shipped products for brands across media, education, retail, and technology, with a strong focus on accessible, scalable interfaces and robust engineering practices. I enjoy collaborating with product and design teams to turn complex problems into delightful user experiences using modern JavaScript/TypeScript, React, Node, and cloud-native tooling. I’ve led open-source accessibility initiatives, migrated pipelines to CI/CD, and mentored engineers while contributing to open-source front-end tooling and performance improvements. I’m passionate about performance, testing, and maintainable code, and I love helping teams adopt agile methods and tooling to ship value quickly and reliably.

Available to hire

Hi, I’m Dan, a software engineer with 18+ years of experience building web and mobile applications across the full stack. I’ve shipped products for brands across media, education, retail, and technology, with a strong focus on accessible, scalable interfaces and robust engineering practices. I enjoy collaborating with product and design teams to turn complex problems into delightful user experiences using modern JavaScript/TypeScript, React, Node, and cloud-native tooling.

I’ve led open-source accessibility initiatives, migrated pipelines to CI/CD, and mentored engineers while contributing to open-source front-end tooling and performance improvements. I’m passionate about performance, testing, and maintainable code, and I love helping teams adopt agile methods and tooling to ship value quickly and reliably.

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Experience Level

Expert
Expert
Expert
Expert
Expert

Language

English
Fluent

Work Experience

Senior Software Engineer (Contract) at Crossstide (formerly 101 Ways)
November 1, 2023 - October 24, 2025
Led frontend and full-stack initiatives for client projects, improving performance, accessibility, and delivery pipelines. Implemented modern tooling, CI practices, and component libraries to accelerate product delivery for multiple clients.
Principal Engineer (Contract) at Gumtree
March 1, 2023 - October 24, 2025
Directed web performance monitoring, synthetic/apparent monitoring, and infrastructure migrations (CI/CD, AWS, Nexus, Git/GitHub issues). Worked with tech leads to guide migration efforts and optimize the web stack.
Senior Software Engineer (Contract) at Crossstide
August 1, 2022 - October 24, 2025
Led solution work for web performance monitoring and CI/CD migrations across client projects, including cloud infra integration (AWS, NX, GitHub). Collaborated with GitHub engineers to implement changes.
Senior Front-End Developer (Contract) at Springer Nature
July 1, 2017 - October 24, 2025
Delivered accessible references and improved the front-end UI library; collaborated with editors and researchers to ensure accessible, performant interfaces.
Senior Front-End Developer (Contract) at Times Educational Supplement (TES)
December 1, 2012 - October 24, 2025
Implemented TES Pro digital project for teachers; delivered streaming and interactive content ensuring accessibility and cross-browser compatibility.
iOS App Development, Design & Delivery (Freelance) at Dorling Kindersley / Penguin
September 1, 2012 - October 24, 2025
Designed, developed and delivered iOS apps; native UI components, Objective-C/Swift as needed, and coordination with editorial teams.
Front-End Developer (Contract) at Macmillan Publishers (now Springer Nature)
July 1, 2012 - October 24, 2025
Rebuilt and styled existing CMS-driven pages; improved performance and accessibility; collaborated with editorial teams.
Senior Web Developer (Contract) at Real Smart Apps (Dapps project)
January 1, 2018 - October 24, 2025
Built a web app for a national newspaper launch; led frontend/backend integration, and contributed to the prototype and testing of core features.
Senior Front-End Developer (Contract) at Dorling Kindersley / Penguin
December 1, 2012 - October 24, 2025
Developed native iOS/OS X interfaces; led in-house app evolution and coordinated with backend teams; contributed to UX and performance improvements.
Senior Full-Stack Developer (Contract) at Augustine Bader (with Crossstide)
October 1, 2018 - October 24, 2025
Completed full-stack rewrites for e-commerce/healthtech platforms; introduced modern JS stacks and CI workflows; delivered on time with quality gates.
Senior Full-Stack Web Developer (Contract) at Augustine Bader (with Crossstide)
October 1, 2018 - October 24, 2025
Led end-to-end development of web apps, including frontend, REST APIs, and deployment pipelines; mentored junior developers and set up testing.
Senior Front-End/Flash Web Developer (Contract) at BBC Future Media & Technology
April 1, 2009 - October 24, 2025
Implemented new frontend functionality for journalism-focused projects; used Flex, Flash, and HTML5 transitions for responsive experiences.
Front-End/Flash Web Developer (Contract) at Salmon
February 1, 2011 - October 24, 2025
Freelance frontend development for e-commerce clients; built CMS-driven pages and maintained legacy platforms with modern enhancements.
Senior Front-End Developer (Contract) at Macmillan Publishers (Springer Nature)
July 1, 2012 - October 24, 2025
Led frontend initiatives, migrated components to modern frameworks, and improved accessibility and performance across sites.
Web Developer (Contract) at Lightmaker
February 1, 2008 - October 24, 2025
Full-cycle web development for high-profile CMS-driven sites; maintained in-house CMS and created reusable components.

Education

BA (Hons) Natural Sciences (Physics) at Emmanuel College, University of Cambridge
January 1, 1997 - January 1, 2000
Postgraduate Diploma in Computer Science (Distinction) at University of Cambridge
January 11, 2030 - October 24, 2025

Qualifications

BA (Hons) Natural Sciences (Physics)
January 1, 1997 - January 1, 2000
Postgraduate Diploma in Computer Science (Distinction)
January 11, 2030 - October 24, 2025

Industry Experience

Software & Internet, Media & Entertainment, Education, Professional Services, Government

Experience Level

Expert
Expert
Expert
Expert
Expert