Medior / Senior Frontend Software Engineer (f/m/d)

As a Medior/Senior Frontend Software Engineer at ONEKEY, you will play a pivotal role in shaping how users interact with our SaaS platform for Product Cybersecurity and Compliance. You will design and develop modern, intuitive user interfaces that make complex IoT firmware security insights accessible and actionable. Working closely with backend engineers, security experts, and white-hat hackers, your work will directly impact user experience, product adoption, and the overall success of ONEKEY’s platform.

You’ll be part of a small, agile engineering team, working closely with backend developers, security experts, and white-hat hackers. This role offers a strong mix of hands-on frontend development, UX, automated testing, and collaborative problem-solving in a highly technical and security-focused domain.

• ‍Frontend-focused and Quality-driven
  You enjoy building modern, clean, and maintainable user interfaces with a strong focus on usability and code quality.
• Collaborative and Product-minded
  You work closely with backend developers, security experts, and other stakeholders to deliver cohesive product features.
• Curious and Security-aware
  You are interested in understanding the security domain and enjoy working on products that operate close to real-world cybersecurity challenges.

• A World-Class Team
  World class cybersecurity expert team in Belgium, Germany, Hungary
• European Leader in Product Cybersecurity & Compliance
  Being part of the leading European team and technology for product cybersecurity & compliance
• Remote or Office Flexibility
  Opportunity to work remotely or from our awesome office in Budapest
• Start-Up Spirit, Streamlined Processes
  A start-up atmosphere, but with stream-lined processes (not overcontrolled ones)
• Flat Hierarchies and Transparent Culture
  Flat hierarchy and a transparent and open-minded culture
• Competitive Compensation & Top Equipment
  Highly competitive compensation, state of the art equipment
• Collaboration Across Borders
  Opportunity to meet your colleagues in person in Belgium/ Germany / Hungary
• Modern Communication
  No emails, just Slack for our daily internal communication

• Frontend Development
  Developing and maintaining a modern UI for ONEKEY Product Cybersecurity & Compliance Platform
• Collaboration Across Disciplines
  Cooperating closely with backend developers and white-hat hackers to deliver end-to-end product features
• Automated Testing & Quality Assurance
  Maintaining and improving automated testing environments and applying TDD practices
• Agile Teamwork
  Working in close cooperation with others in an agile, cross-functional team
• Process & Tooling Support
  Contributing to process automation and development workflows using tools such as Jira, GitLab, and scripting where needed

• Frontend Experience
  Minimum 5 years of hands-on experience in frontend development, building and maintaining production-grade web applications
• Modern Web Technologies
  Experience with modern web frameworks and languages, especially React and TypeScript
• Testing & APIs
  Experience with automated testing and TDD, as well as working with REST and/or GraphQL APIs
• Frontend Tooling
  Nice to have experience with Next.js, Tailwind, and testing tools such as Cypress, Playwright, or Jest/Vitest
• Process Automation & Tooling
  Experience in process automation or tooling (e.g. Jira, GitLab, Python)
• Design-oriented Thinking
  Having a design-focused mindset with attention to usability, consistency, and user experience
• Security Interest
  Any experience or strong interest in IT security (e.g. penetration testing, reverse engineering, CTFs) is a big plus
• Language Skills
  High level of English in speaking and writing

Nice to have skills

• Backend Development with Python
  Experience using Python for backend development, scripting, or building APIs, and collaborating effectively with backend systems and services
• UX / User Experience Design
  Understanding of UX principles, user-centered design, and usability best practices, with the ability to collaborate closely with designers or contribute to UX decisions