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Senior Software Engineer, Front End at Flagshippioneeringinc
FlagshippioneeringincCambridge, MA USA·1d ago
SeniorFull-timeTypeScriptReactNode.jsAWSGitAI
Salary Range
$132,600 - $179,400 /year
This salary is estimated based on similar roles. The actual salary may vary.
About the Role
The Pioneering Intelligence group at Flagship Pioneering is building intelligent software systems that integrate agentic AI with scientific reasoning to accelerate research, development, and decision-making. We are seeking a Senior Front-End Software Engineer to design, integrate, and deploy web-based applications that enable seamless human–AI collaboration. This role is part of a bold, agentic initiative within the Pioneering Intelligence portfolio and offers the opportunity to help define the future of user-centric, LLM-enabled platforms.
Key Responsibilities
- →Architect, develop, and maintain high-quality, testable front-end code and workflows aligned with complex scientific and analytical use cases.
- →Translate user stories, wireframes, and prototypes into production-ready features emphasizing clarity, maintainability, and reusability.
- →Implement responsive, accessible, and performant UIs optimized for data-rich, interactive workflows.
- →Ensure security, scalability, and observability of front-end services in cloud environments (AWS).
- →Design and implement user interfaces from scratch, combining strong visual design with robust engineering.
- →Create and maintain scalable, consistent, and visually appealing UI components using a modern React.js stack.
- →Maintain front-end quality through comprehensive testing and validation of user flows and interface behavior.
- →Develop and maintain test suites (unit, integration, and end-to-end) for UI reliability.
- →Apply DevOps/GitOps practices for automated testing, deployment, and monitoring.
- →Mentor engineers and scientists, driving technical quality and ensuring extensibility and performance across evolving use cases.
Requirements
- ✓B.S. in Computer Science, Engineering, or related field, with 6+ years of professional software development experience.
- ✓Expertise with modern front-end frameworks and tools, including React.js, TypeScript, Tailwind CSS, Redux Toolkit, Playwright, and Shadcn.
- ✓Strong experience with Node.js.
- ✓Skilled in writing and maintaining comprehensive test suites (Jest, React Testing Library, Cypress).
- ✓Experience with system design, performance optimization, observability, and operational excellence for parallel LLM workloads.
- ✓Strong intuition for UX design and a passion for building intuitive, workflow-first products.
- ✓Excellent communication skills and a collaborative mindset in fast-moving, cross-functional environments.
