Senior Frontend Developer, all genders

diconium

Senior Frontend Developer at Diconium, responsible for frontend development in digital transformation projects. Collaborating in a hybrid team to optimize technology and processes.

Posted 7/3/2026full-timeBucharest • 🇷🇴 RomaniaSeniorWebsite

Tech Stack

Tools & technologies

AngularDockerJavaScriptJenkinsMicroservicesReactSvelteTypeScriptVue.js

About the role

Key responsibilities & impact

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Drive modernization initiatives, especially around outdated frontend technologies (the current ExtJS-based application) and performance bottlenecks.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

Requirements

What you’ll need

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
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
Strong proficiency in JavaScript and/or TypeScript
Experience with at least one modern frontend framework ( React, Angular, Vue.js, Svelte ) — a plus
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
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
Experience building and maintaining CI/CD pipelines (GitHub, GitLab, Jenkins or similar)
Working knowledge of Docker for frontend deployment and environment decoupling
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.

Benefits

Comp & perks

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.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

ExtJSJavaScriptTypeScriptMicroservicesAPI-First DevelopmentTest-Driven Development (TDD)Performance OptimizationAccessibility (a11y)UI/UX PrinciplesFrontend Build Tools

Soft Skills

Strong Communication SkillsTeam-Oriented MindsetProblem-Solving SkillsTime-Management SkillsAdaptability