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.
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+.
### 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
