Tellus Solutions, Inc · 4 hours ago
Senior Software Engineer - React/TypeScript
Tellus Solutions, Inc is seeking a Senior Software Engineer with deep expertise in React and TypeScript to join their engineering team. In this role, you'll be responsible for building intuitive, high-performance user interfaces for their payment platform, working on challenging front-end problems and creating customer-facing applications that process billions of dollars in transactions.
Information ServicesInformation TechnologyProfessional ServicesSoftware
Responsibilities
Build and maintain sophisticated React applications that power our merchant and developer portals, and payment dashboards
Develop reusable component libraries and design systems that scale across multiple products and platforms
Create embedded payment widgets and SDKs that integrate seamlessly into third-party applications
Build real-time dashboards that display transaction data, analytics, and business insights
Design and implement RESTful API integrations to connect front-end applications with payment processing systems
Develop Node.js/Express backend services to support front-end applications and provide API layers
Ensure exceptional UX/UI with responsive, accessible, and performant interfaces across all devices
Optimize application performance including bundle size, load times, and rendering efficiency
Write clean, maintainable TypeScript code with proper typing and comprehensive test coverage
Collaborate with designers to translate mockups and prototypes into production-ready features
Work with backend engineers to define API contracts and ensure seamless integration
Implement payment security best practices including PCI compliance requirements for handling sensitive data
Participate in code reviews and mentor junior engineers on React and TypeScript best practices
Contribute to technical architecture decisions for front-end infrastructure and tooling
Qualification
Required
5+ years of professional software development experience with a focus on front-end engineering
Expert-level proficiency in JavaScript and TypeScript with strong understanding of ES6+ features
Deep experience with React including hooks, context, state management, and component lifecycle
Strong command of HTML5 and CSS3 including responsive design, flexbox, grid, and modern CSS patterns
Proven experience building and consuming RESTful APIs with proper error handling and async patterns
Solid experience with Express.js or similar Node.js frameworks for building backend services and APIs
Experience with modern build tools (Webpack, Vite, or similar) and package managers (npm, yarn)
Strong knowledge of testing frameworks (Jest, React Testing Library, Cypress, Playwright)
Familiarity with version control (Git) and CI/CD pipelines
Experience with responsive and mobile-first design principles
Understanding of web security best practices including XSS, CSRF protection, and secure authentication
Excellent problem-solving skills and attention to detail
Strong communication and collaboration skills with the ability to work effectively in cross-functional teams
Preferred
Understanding of payment processing workflows and fintech domain knowledge (preferred but not required)
Experience building embedded widgets or SDKs for third-party integration
Knowledge of payment industry standards and PCI-DSS compliance requirements
Experience with state management libraries (Redux, Zustand, Recoil, or similar)
Experience with React Native for mobile development
Experience with design systems and component libraries (Material-UI, Chakra UI, Tailwind CSS)
Familiarity with cloud platforms (GCP, AWS, Azure) and serverless architectures
Knowledge of OAuth 2.0, JWT, and authentication flows