senior front end engineer @ thessaloniki | tax technology consulting

As a Senior Consultant in our Tax Technology Consulting team, you will work as the Senior Frontend Engineer and UI/UX Lead for our AI platform used across professional services.

The frontend is a Single Page Application built with Angular/TypeScript — featuring a real-time chat interface, admin dashboards, document management, multi-language support, and mobile capabilities.

You will lead the frontend direction, establishing the design system, code quality standards, and UI/UX direction for the entire application. You will mentor and review the work of the developers who contribute to the frontend, ensuring consistency, polish, and usability. This role isn’t just about code — it’s about how the product looks, feels, and works.

#KeyResponsibilities

• Lead the frontend direction — establish and maintain a cohesive design system, component library, theming, and visual language

• Own the UI/UX quality — user journey design, wireframing, usability testing, and visual consistency

• Conduct structured code reviews for all frontend pull requests, mentoring team members and enforcing quality standards

• Architect and maintain scalable frontend state management for complex real-time features (SSE streaming, WebSocket)

• Build and evolve the real-time chat interface — streaming responses, interactive elements, and rich content rendering

• Own admin dashboards — user management, analytics, and configuration

• Ensure multi-language support (i18n) is consistent, complete, and maintainable

• Improve accessibility (WCAG compliance) and performance (Core Web Vitals)

• Guide the mobile application evolution

• Collaborate with backend and AI teams to design clean API contracts and data flows

#RequiredSkills

To qualify for the role, you must have:

• Bachelor’s degree in Computer Science, Design, Human-Computer Interaction, or a related field

• 3–6 years of professional frontend development experience with Angular and TypeScript (React experience is transferable)

• Demonstrable UI/UX design sensibility — experience creating or maintaining design systems and component libraries

• Strong understanding of user experience principles — user journeys, wireframing, and usability testing

• Experience with real-time UI patterns — Server-Sent Events (SSE), WebSocket streaming

• Knowledge of state management at scale — NgRx, RxJS, or similar reactive programming patterns

• Experience with code review and mentoring

• Proficiency with modern CSS (SCSS, CSS Grid, Flexbox), responsive design, and cross-browser compatibility

#PreferredSkills

• Proficiency with Figma or similar design tools for wireframing and prototyping

• Experience with mobile development (Android/iOS hybrid, PWA, or responsive-first approaches)

• Knowledge of accessibility standards (WCAG 2.1+)

• Experience with internationalisation (i18n) frameworks and multi-language applications

• Familiarity with conversational/chat UI patterns — streaming text, markdown rendering, rich embeds

• Experience with performance optimisation — lazy loading, code splitting, bundle size management

• Understanding of AI/ML product interfaces

• Experience working in design-aware engineering teams / product-led organisations

#WhatWeOffer

At Deloitte, we know that great people make a great organization. We value our people and offer employees a broad range of benefits.

• Modern hybrid workplace, characterized by flexibility and Smart Working

• Empowered well-being: We provide multiple program offerings to support your well-being needs (flexible working arrangements, extra days of leave, parental allowances)

• Engagement within international large-scale teams and projects, with opportunities to travel for training or client purposes.

• Constant opportunities for learning with unlimited access to internal and external learning platforms and sponsored certificates aligned with business needs and technology trends

• Challenging and innovating environment where personal development and growth are encouraged, always with transparency and trust

• Diverse culture and active communities that enable you to bring yourself to work

• Team Building and Corporate Social Responsibility Activities

• A buddy to support you with your onboarding

• Private medical health insurance plan

• Ticket restaurant card

• Exclusive Discounts to several retail providers, restaurants and others

• Mobile phone

• Fresh fruits and unlimited coffee everyday at our offices

Please note that all the well-being benefits mentioned above are subject to annual review.