Nikolaos Margaris

Experienced Senior Front-End Engineer and Technical Lead with 18+ years crafting scalable, accessible, and maintainable web applications. Expert in React, TypeScript, HTML5 semantics, CSS3, and Design Systems, with a strong focus on WCAG-compliant, inclusive web accessibility (a11y). Proven track record embedding accessibility standards into design systems and engineering workflows, mentoring teams, and delivering quality software in agile environments.

Email / Website / LinkedIn / GitHub / X

👨‍💻👩‍🎓💪 Strengths

• Team mentorship & leadership
• Accessibility-first development
• Code quality & documentation
• Cross-functional collaboration
• Performance optimization & accessibility

👩🏼‍💻 Technical Experience

Front End Software Engineer @ MORPHOSES - EduTech (Jul 2025)

• Improving and implementing the front-end for morphoses.io, an eLearning platform delivering an innovative soft-skills improvement solution for learners aged 6–18.

• Technologies using: Angular, Angular Material, AWS, Stomp, DotLottie, Whereby`
  
  

Front End Software Engineer @ ADEMU - Agentic AI Startup (Dec 2024 - Mar 2025)

• Built the web front-end for an Agentic AI product, developing user-facing interfaces for AI-driven, agent-based workflows using React, integrated with AWS infrastructure.

• Delivered performant, responsive UIs with semantic markup, ARIA support, and WCAG-aligned accessibility best practices.

• Technologies used: React, AWS, SuperTokens (Auth), ViteJS, Playwright, BunJS
  
  

Front End Technical Lead @ ANIXE - Tourism & Travel (Mar 2021 - Nov 2024)

• Spearheaded the design and implementation of a scalable Design System in React.
• Mentored a team of front-end engineers; improved code quality through reviews and best practices.
• Led web accessibility strategy across the Design System, driving WCAG 2.1 AA compliance through ARIA patterns, semantic HTML, and keyboard-navigable components.
• Championed accessibility testing (Jest, RTL, axe, screen readers); introduced semantic standards and a11y guidelines across codebases.
• Defined front-end strategy and tooling selection, enhancing developer productivity and performance. Built a Design System (UI Component Libraries in React).
  Focused on everyday improvement of FE Developers/Engineers. Selected right technologies and defining implementation strategies. Ensured quality product results, established development Best Practices. Performed trainings, enhanced company’s knowledge base and documentation.
  
  

Senior Front End Engineer @ ANIXE - Tourism & Travel (May 2018 - Apr 2021)
Project ZYTHOS - Contract Management Project (part of large scale modular solution called ARKADIA). Project UNPP - Back Office (Bed Bank Management).

• Drove Front End apps (Zythos, Unique++, Yield++)
• Designed Front End Architectures
• Implemented new Front End features using agile methodologies
• Increased product quality, both for Front End and Back End
• Provided consultation, trained colleagues with regards to Front End
• Configured and used proper healthy automated CI pipelines
• Embraced Docker containerization
• Maintained Front End libraries
• Contributed to Styleguide and commonly shared libraries
• Contributed to Back End’s functionality
• Technologies used: Angular 10, SCSS, Git, Redux, .Net Core, Java 8, PostgreSQL
  
  

Senior FrontEnd Engineer @ Ryanair Airlines (Nov 2016 - Apr 2018)
Project Ryanair Rooms - Online Hotel Booking Application.

• Developed a large scale, from ground up, Angular Web Application
• Developed several Angular 5 Micromodules
• Configured cloud services of deployed projects using AWS
• Embraced Functional Programming
• Leaded a small team producing clean and effective code, according to best practices
• Contributed to company’s technical knowledge increase by conducting internal training sessions, providing proper documentation and presentations
• Increased product quality by efficiently solving customer-tickets
• Developed several proof-of-concepts
• Contributed to performance enhancements of company’s internal product
• Worked on both ‘agile-based’ and ‘waterfall’ production processes (Scrum, KanBan e.t.c.)
• Technologies used: Typescript, Redux, SCSS, RxJs, Git,Webpack, JEST and several 3rd party Angular / Node.js modules
  
  

Senior Software Engineer @ UNIFY - Telecom (May 2008 - Oct 2016)
Project Circuit Unify’s cloud-based, enterprise-grade and secure Unified Communication and Collaboration platform. Project Hipath8000 - SEN’s IP softswitch solution (Telecom)

• Developed automated test-suites using JSHint, Jasmine, JSCover
• Developed a web portal using J2EE, JSP, JSF, AJAX, on TOMCAT server
• Developed WebServices (SOAP, Axis, Hibernate, OpenJPA, JAXB, JCraft) on OSGI container
• Developed an SNMP agent using SNM4J
• Technologies used: AngularJS, NodeJs, Git, Clearcase, ExpressJs, MongoDB, J2EE, Spring, OpenJPA, JSF, MySQL, SolidDB
  
  

SAP R/3 Developer @ FrameWork - IBM (Nov 2007 - Apr 2008)
Project Phillipos - External Associate for IBM supporting SAP installation/configuration at Hellenic Army and (F.A.G.E. – Milk Industry).

• Developed ABAP reports & dialogs
• Supported SAP Consultants based on customer requests
• Technologies used: SAP ABAP R/3
  
  

📌 On The Side

Smart Calculator @ daily-math.online
Do your daily calculations fast and efficiently! Smart Calculator is a digital tool to help you save cost while calculating from shopping expenses, fuel consumption up to salary raises e.t.c

RandeZoo - Pet Friends @ RandeZoo
Side project for our beloved 🐶 friends ;) - Pets

Find a friend for your pet. Connect with vets & animal welfare organizations. Adopt or reunite with your missing pet. Find a pet friendly hotel. And, Protect your pet from hazardous areas.

Code Assistant
Side project for people with ♿ disabilities, no-coders and IT professionals

Create FEs in a fast and effective manner, with minimum effort and/or knowledge from people with disabilities, for everyone to use.

An idea that solves the problem of creating FEs by people with disabilities, for everyone to use, of any technical knowledge level and/or disability.

An idea that solves the problem of employment for disabled people in IT.

Blog Site

Note: Project still in progress …

💬 Languages

Greek: Native
English: Proficient

👩🏼‍🎓 Education

Bachelor of Computer Engineering and Infomatics @ University of Patras
Patras University - Patras, Greece (2000 - 2004)

MsC of Computer Engineering and Infomatics @ University of Patras
Patras University - Patras, Greece (2004 - 2005)

AWS Training and Certification - Architecting on AWS (Nov 2017)

AWS Training and Certification - AWS technical Essentails (Nov 2017)