Middle Front-End Developer (React)

Spin.AI is a global SaaS cybersecurity company that protects mission-critical data across Google Workspace, Microsoft 365, Salesforce and Slack. Our product - SpinOne unifies SSPM, ransomware protection, DLP, backup & recovery in one platform trusted by enterprise customers worldwide.

As our platform continues to grow, we are expanding our front-end engineering team and looking for a Middle Front-End Developer with strong React experience. We are looking for someone who can take ownership of complex UI features, build scalable and maintainable front-end architecture, and work closely with backend, QA, DevOps, and Product teams to deliver high-quality product experiences.

This role is ideal for an engineer who is comfortable working with complex SaaS products, data-heavy interfaces, integrations, dashboards, permissions, access control, asynchronous workflows, and enterprise-level user scenarios.

You will become part of a strong engineering team working on a cybersecurity SaaS platform used by enterprise customers worldwide.

This role is based in our Lisbon office in a hybrid format. If you are not currently in Portugal, we are open to remote work during the trial period, with relocation to Lisbon afterward.

What You Will Build

You will work on the SpinOne web platform, including:

• complex web application interfaces
• dashboards and data-heavy views
• security, backup, recovery, and DLP-related flows
• integrations with Google Workspace, Microsoft 365, Salesforce, Slack
• access control, permissions, audit logs, and admin workflows
• UI for asynchronous backend processes, jobs, notifications, and system statuses
• scalable front-end components used across the product
  
  
  

Tooling & Technologies Used

• React
• TypeScript / JavaScript
• Redux / state management tools
• REST APIs
• HTML5, CSS3, SCSS / modern styling approaches
• Browser DevTools
• Git / Bitbucket
• Jira
• Confluence
• CI/CD pipelines
  
  
  

Responsibilities

• Develop and maintain complex front-end features using React

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• Build scalable, reusable, and maintainable UI components
• Work closely with Product Managers, UX/UI designers, backend developers, QA engineers, and DevOps
• Participate in technical discussions, solution design, and feature planning
• Integrate front-end functionality with REST APIs and backend services
• Work with complex data structures, permissions, roles, statuses, and asynchronous workflows
• Ensure high performance, responsiveness, and stability of the web application
• Analyze requirements, clarify edge cases, and proactively identify risks or gaps
• Participate in code reviews and contribute to front-end best practices
• Improve existing front-end architecture, performance, and code quality
• Debug UI issues using Browser DevTools and logs
• Collaborate with QA to support testing, bug fixing, and release stability
• Work with documentation and keep technical information up to date when needed
  
  
  

Must-have Requirements

• 3+ years of commercial front-end development experience
• Strong hands-on experience with React
• Strong knowledge of JavaScript and TypeScript
• Solid understanding of HTML5, CSS3, responsive design, and cross-browser compatibility
• Experience with state management tools such as Redux or similar
• Experience integrating front-end applications with REST APIs
• Good understanding of web application architecture and component-based development
• Ability to work with complex product logic, data-heavy interfaces, and enterprise-level workflows
• Experience with debugging, performance optimization, and browser DevTools
• Understanding of Git flow and modern development practices
• Ability to write clean, maintainable, and well-structured code
• Critical thinking, ownership, and ability to challenge requirements when needed
• Good communication skills and ability to work in a cross-functional team
• English: Intermediate+
  
  
  

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Your Impact

• Help us build a stable, scalable, and user-friendly cybersecurity SaaS platform
• Improve the quality and maintainability of our front-end codebase
• Contribute to better user experience for enterprise customers
• Support faster and more predictable feature delivery
• Help evolve front-end standards, practices, and architecture within the team
  
  
  

Why Spin.AI

• Work in a fast-moving, high-impact cybersecurity company recognized by Gartner, Forrester, and G2
• Work on a real product with real users and visible business impact
• Work on an interesting and large-scale product
• Solve complex, non-trivial security and engineering challenges
• Opportunity to influence technical and product decisions
• Trust from management and autonomy in day-to-day work
• Strong, professional team with deep expertise
  
  
  

What We Offer

• Annual performance-based salary review
• Annual performance-based bonus
• Referral bonuses
• Educational budget
• Sport & hobby compensation
• Medical insurance compensation
• Company presents (birthdays, anniversaries, weddings, etc.)
• Corporate travel parties twice a year
  
  
  

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.