Senior Frontend Developer (all genders)

Join our global team of experts  At Diconium, we do digital business transformation across various industries. As a team member, you will work on projects that generate value from software, data, and AI by delivering strategies and solutions that challenge conventional industry practices and drive technological progress. Together with over 2,300 fellow experts, you enable Fortune 500 firms, global market leaders, and SMEs to maximize the impact of their digital initiatives and achieve digital excellence. In everything we do, we prioritize people and genuine human connections, ensuring a supportive and inclusive work environment. And we give you maximum flexibility thanks to our hybrid workplace. 

WHAT YOU CAN EXPECT 

 

Take ownership of frontend development within a micro-frontend architecture inside the project. 

Design, implement, and maintain scalable, modular, and accessible UI components. 

Collaborate closely with backend engineers using API-first and BFF patterns. 

Contribute to the transition phase, including knowledge transfer from the external supplier and stabilization of existing systems. 

Drive modernization initiatives, especially around outdated frontend technologies (the current ExtJS-based application) and performance bottlenecks. 

Ensure high code quality through TDD, code reviews, and automated testing. 

Optimize applications for performance, accessibility (a11y), SEO, and sustainability. 

Actively contribute to architectural decisions with a frontend perspective. 

Support CI/CD pipelines and containerized frontend deployments (Docker). 

Work in cross-functional, self-organized agile product teams and collaborate with stakeholders. 

 

Key Deliverables 

High-quality, production-ready frontend features aligned with business requirements. 

Maintainable and well-documented frontend codebases. 

Improved application performance, stability, and user experience. 

Successful transition of ownership from the previous supplier. 

Contributions to a modern, agile, and outcome-driven product organization. 

 

A strategically important project with high visibility, being the first insourcing initiative of its kind at diconium. 

Full end-to-end ownership of frontend topics, from architecture and implementation to operations and optimization. 

A complex, real-world product landscape with long-running systems, many interfaces, and meaningful technical challenges. 

Active involvement in a transition phase, followed by shaping a modern, agile, outcome-driven product organization. 

The opportunity to modernize and future-proof frontend technology, architecture, and development practices. 

Close collaboration in cross-functional, self-organized product teams with a strong engineering culture. 

Room to influence technical decisions, standards, and best practices across products. 

A strong focus on quality, accessibility, performance, and sustainability. 

Continuous learning through hands-on problem solving, knowledge sharing, and exposure to modern frontend and cloud technologies. 

An international setup with English as working language, nearshore collaboration, and limited travel (~10days / year). 

 

 

WHAT YOU BRING ALONG  

ExtJS Expertise 

Deep, hands-on proficiency in ExtJS 

Experience with ExtJS customization and framework overrides 

Solid understanding of ExtJS architecture (MVC / MVVM patterns) 

Skilled in handling large volumes of data: data structures, models, stores, grids, and virtualization 

Familiarity with ExtJS tooling, build processes, and licensing 

Strong performance and enterprise-application mindset 

Core Architecture & Engineering 

Understanding of Domain-Driven Design (DDD) concepts and bounded contexts 

Experience with microservices and micro-frontend architectures 

API-first mindset; experience with API Gateway and Backend-for-Frontend (BFF) patterns 

Knowledge of common software design patterns 

Familiarity with resiliency patterns (retry, fallback, rate limiting) 

Ability to design for scalability, fault tolerance, and observability 

Frontend Development 

Strong proficiency in JavaScript and/or TypeScript 

Experience with at least one modern frontend framework (React, Angular, Vue.js, Svelte) — a plus, given the roadmap to modernize away from ExtJS 

Development of modular, scalable, responsive UI components 

Experience with modern frontend build tools and workflows 

Focus on accessibility (a11y), performance optimization, and SEO 

Knowledge of lazy loading, code splitting, and frontend performance techniques 

Strong understanding of UI/UX principles 

Quality & Security 

Advanced knowledge of Git and version control workflows 

Experience with Test-Driven Development (TDD) and automated UI testing 

Awareness of secure coding practices and common web security risks 

DevOps & Delivery 

Experience building and maintaining CI/CD pipelines (GitHub, GitLab, Jenkins or similar) 

Working knowledge of Docker for frontend deployment and environment decoupling 

Collaboration & Professional Skills 

Strong communication and stakeholder interaction skills 

Team-oriented mindset and collaborative approach 

Ability to learn quickly and adapt to change 

Strong problem-solving and time-management skills 

Ownership-driven, customer-centric, and sustainability-aware mindset 

WHAT WE HAVE TO OFFER

Discover new skills and improve your strengths, adapt your working day to your personal lifestyle, celebrate community, sustainability and diversity. And sweeten your working life with awesome perks and benefits!

Professional & Personal Growth: Develop yourself both professionally and personally through training programs, free language courses, competence centers and an active tech community.

Flexible Work-Life Balance: Benefit from hybrid work, workation, flexible hours, parental support and sabbaticals.

Embrace Diversity & Sustainability: Engage in our Sustainability Hub, diverse communities, Diversity Taskforce and after-work activities.

Comprehensive Benefits: Enjoy public transport tickets, job bikes, access to exclusive Volkswagen employee conditions when leasing or purchasing a vehicle, health offers, supplementary insurances, a pension plan and various discounts.

WHAT WE VALUE

At Diconium, we value and recognize the unique perspectives and experiences of each individual. With this in mind, we welcome and cherish every single application equally. At the same time, we stand up against any type of discrimination and harassment based on gender, age, skin color, religion, sexual orientation, origin, disability, gender identity and other protected characteristics.   If you have any questions, feel free to reach out.

Your contact person is Elena, elena.filip@diconium.com