Senior React/Electron Developer (Freelance)

Altamira is a software development outsourcing company. We provide solutions that make a tangible impact on our client's growth and productivity. With domain knowledge across product and technology development, we aim to provide cost-efficient solutions without compromising quality. We are driven to deliver the best, every single time.

Altamira service delivery teams currently span Slovakia, Ukraine, and the Middle East, and we have ambitions to expand our footprint to meet the growing demand across Europe and into our primary growth markets in the UK and the US. In terms of industry verticals, we are focused on EdTech, Fintech, eCommerce, and Pharma.

We are looking for a Senior React/Electron Developer to temporarily support our team on a live EdTech project — a comprehensive Virtual Learning Environment designed for students aged 4–18. The platform, already in use in primary and secondary education, provides a unified experience for students, teachers, and administrators by combining fragmented tools into a single, seamless system. It operates across web, mobile, and desktop devices, with full support for offline learning, assignment workflows, and performance tracking.

Your role will focus on enhancing the Electron-based desktop functionality, optimizing the architecture, resolving existing issues, and offering technical guidance throughout the development process.

Responsibilities

• Improve, extend, and debug the existing Electron-based functionality
• Provide technical consulting on best practices for Electron apps (architecture, security, packaging)
• Develop and integrate new desktop features in collaboration with the frontend/backend team
• Ensure smooth performance across Windows, macOS, and Linux
• Optimize performance and security in a cross-platform environment
  
  

Requirements

• Electron Expertise:
• Deep knowledge of Electron architecture: IPC, main/renderer processes, preload scripts
• Experience with native menus, packaging, and distribution
• Familiarity with security practices:contextIsolations, sandboxing, secure IPC
• React.js Proficiency:
• Solid experience with hooks, component-based architecture, and performance optimization
• State management with Redux, Zustand, or Recoil
• JavaScript/TypeScript:
• Strong command of ES6+ features and clean coding practices
• UI/UX Implementation:
• Ability to translate Figma/Sketch designs into pixel-perfect interfaces
• Node.js Integration:
• Working with local APIs and system-level features (e.g., file systems, permissions)
• Tooling:
• Experience with Webpack, Vite, Electron Forge or Builder
• Understanding of performance optimization in long-running apps
  

Nice to Have

• Experience with automated testing in Electron apps (Spectron, Playwright)
• Familiarity with CI/CD pipelines for desktop app delivery
• Basic experience with native code integration (C++ / Objective-C)
• Experience with offline-first or sync-capable desktop applications
  
  

Our transparent recruitment journey usually takes up to 2 weeks and includes a few stages:

• Recruiting Interview -> 30-45 min
• Technical Interview -> 1-1,5h
• Client Interview (optional) -> up to 1h
• Pre-Offer Call -> 15min
• Reference Check
• Offer
  
  

We offer:

• Competitive salary, room for development and growth;
• Possibility to work in the Bratislava and Kyiv office or fully remotely;
• Loyal management, interesting tasks, constant support;
• Medical insurance (optional);
• English courses;
• Technical equipment providing;
• Paid vacations 20 workdays, paid sick leave, regular salary reviews;
• Flexible schedule and ability to manage your working hours;
• Support your personal growth and skills upgrading;
• The great environment inside the team, support of initiatives, and ability to contribute to the common goal.
  
  

We do believe that the success of altamira.ai is impossible without the success of our Talents and the success of our Clients!