Senior Full Stack Engineer (Workflow)

About the Role

We're seeking an exceptional Senior Full-stack Engineer to take part in the ground-up rebuild of our LottieFiles Platform - a digital asset management and collaboration platform serving thousands of users worldwide. This is a rare opportunity to build a greenfield application from scratch, making foundational technical decisions that will impact our platform for the next 5+ years.

As a senior full stack engineer, you'll be responsible for both hands-on development and architectural discussions with the team leadership. You'll work with modern frontend and backend technologies while leveraging your expertise in systems-level programming to optimize performance-critical operations.

This role is perfect for engineers who thrive at the intersection of elegant frontend experiences and high-performance backend systems - someone who can build beautiful UIs while also optimizing the hot paths that handle operations at scale.

What You'll Do

Technical Leadership & Architecture

• �� Participate in shaping the technical vision for rebuilding our asset management platform from scratch
• �� Design centralized data architecture with direct database integration and shared business logic reusable across SSR and future GraphQL.
• �� Make critical architectural decisions including tech stack selection, state management patterns, data layer design, and performance optimization strategies.
• �� Ensure future-proof architecture compatible with GraphQL migration while optimizing for immediate SSR performance
• �� Define coding standards and best practices for the team, ensuring maintainable, scalable code
• �� Collaborate with product and design teams to translate requirements into technical specifications

Full-stack Development

Frontend

• �� Build modern React-based apps with real-time capabilities using technologies like TanStack ecosystem, Server-Sent Events, and BroadcastChannel API
• �� Build performant UI components with smooth data loading patterns, virtualization, and responsive user interactions
• �� Optimize bundle size, lazy loading, and code splitting for <1s Time to Interactive

Backend Integration

• �� Build a shared business logic layer reusable across multiple service boundaries and rendering contexts
• �� Design database schema and ORM integration
• �� Develop background job processing systems for asynchronous workflows

Performance-Critical Systems (Rust/Zig)

• �� Design and optimize performance-critical operations using systems-level programming and worker-based architectures to keep heavy processing off the main thread
• �� Implement WASM modules for browser-based file processing with near-native performance
• �� Build batch processing systems capable of handling large-scale concurrent operations efficiently
• �� Profile and eliminate performance bottlenecks across critical data processing and transformation pipelines

Required

Qualifications

Core Skills

• �� 5+ years of professional software engineering experience, with significant full-stack work
• �� Expert-level React and TypeScript with deep understanding of modern patterns and performance optimization
• �� Strong backend development experience with direct database integration, and API design
• �� Experience designing centralized business logic layers reusable across multiple platforms (SSR, APIs)
• �� Database expertise: Schema design, query optimization, PostgreSQL
• �� Production experience with real-time web technologies (WebSockets, SSE, WebRTC)
• �� Deep understanding of web performance (Core Web Vitals, bundle optimization, lazy loading, code splitting)
• �� Experience with state management at scale (Redux, Zustand, Jotai, Recoil, or similar)
• �� Strong experience in systems-level programming for performance-critical applications, with proficiency in low-level optimization techniques including parallel processing, memory management, profiling, and benchmarking.
• �� Experience building robust file processing systems including upload/download handling, media compression and format conversion, file validation, and quality checks.
• �� Familiarity with cloud infrastructure, CI/CD pipelines, containerization, and monitoring/observability practices.

LottieFiles Perks

• �� Fully Remote Working Environment
• �� Flexible Work Hours
• �� A welcome gift and LottieFiles swag pack
• �� Bonus to set up your workstation at home
• �� Unlimited Leave Days
• �� Medical Insurance
• �� Generous learning budget
• �� Gym membership
• �� Co-working space membership
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Originally posted on Himalayas