Sr Software Engineer, Fullstack

LTK is a global technology platform empowering lifestyle creators to monetize their content. They are seeking a Senior Software Engineer to join the Creator organization, responsible for building scalable, production-quality fullstack systems and experiences.

Responsibilities:

• Coming up with feasible and practical solutions to tough problems
• Design, build, and maintain high-quality fullstack systems and experiences
• Take end-to-end ownership of features across the stack: from early technical design and prototyping through implementation, testing, rollout, and ongoing iteration
• Collaborate with product, design, and other engineers to deliver intuitive, performant, and accessible fullstack experiences that delight creators and brands
• Optimize fullstack applications and services for performance, scalability, and reliability
• Champion best practices in architecture, usability, security, and cross-platform compatibility across the full stack
• Use AI tools to expedite daily workflows (e.g., code generation, refactoring, test creation, documentation) and to improve both speed and quality of web development
• Leverage AI-assisted development practices to prototype, iterate on, and maintain web features efficiently, while holding a high bar for safety and code quality
• Write very high-quality, well-tested code that is robust and easy to maintain
• Take ownership of projects and drive them to completion
• Work and succeed in a fast-paced and agile development environment
• Identify and drive improvements to our fullstack architecture, tooling, and development processes
• Conduct constructive peer design/code reviews and provide clear, actionable feedback
• Work with distributed teams across different time zones
• Serve as a technical subject matter expert for fullstack development who mentors fellow engineers, demonstrates technical experience, and leads teams in solving challenging problems

Requirements:

• 5+ years of software development experience, with significant time spent building and maintaining production-scale fullstack applications
• Deep experience with modern fullstack development, including both front-end and back-end technologies
• Demonstrated proficiency in React.js (or another comparable framework), including building complex, component-based single-page applications
• Strong understanding of front-end architecture and patterns (component design, state management, routing, modularization)
• Experience with modern web tooling and ecosystems (e.g., Webpack/Vite, npm/yarn, linting, formatting, testing frameworks such as Jest, React Testing Library, Cypress, or similar)
• History of designing and building highly scalable, resilient web experiences that serve a growing user base
• Experience integrating with backend services and APIs (REST/JSON, HTTP; GraphQL) and working closely with backend teams to define interfaces and contracts
• Strong focus on performance, accessibility, security, and usability in web applications
• Demonstrated experience using AI tools as part of the software development lifecycle (coding, debugging, testing, documentation) with concrete examples of improved productivity or quality
• Ability to critically evaluate AI-generated code, refine it, and integrate it safely and effectively into production systems while maintaining team standards and best practices
• Experience designing and building backend services or APIs to support web applications in a modern server side language (Go, Java)
• Experience with AWS systems such as ECS, Lambda, and RDS (among others)
• Experience working in a containerized environment (preferably Docker)
• Experience with databases such as MySQL, DynamoDB
• Experience with observability tools like Datadog
• Comfortable shipping code multiple times per day
• Strong technical leadership and mentoring skills
• Ability to model and conceptualize integrations across complex systems and how services interact across the full stack
• Excellent verbal and written communication skills to both technical and non-technical audiences