Senior Frontend Engineer

Compensation: $140,000 - $165,000

Location: 1 Kendall Square, Cambridge, MA (In-person role)

We're looking for an exceptional Senior Frontend Engineer to join our founding team and lead our frontend engineering efforts. You'll work directly with our CTO to build sophisticated, responsive interfaces that make complex AI capabilities accessible to enterprise developers. This is a hands-on technical leadership role where you'll architect our frontend systems, establish engineering best practices, and mentor junior engineers as we scale.

You'll be the frontend technical authority—making critical architectural decisions, building new platform features, refactoring existing systems, and defining how we approach frontend engineering at Blitzy. You're equally comfortable debugging a complex state management issue, architecting a component library from scratch, or mentoring a junior engineer through their first major feature.

• You architect and implement sophisticated frontend solutions that handle complex state management, real-time AI agent updates, and intuitive developer workflows
• You establish frontend engineering standards, patterns, and best practices that scale with our growing team
• You build responsive, performant interfaces that work seamlessly across browsers and devices while maintaining sub-second interaction speeds
• You refactor and modernize existing frontend code, eliminating technical debt while shipping new features
• You make architectural decisions that balance immediate product needs with long-term scalability and maintainability
• You mentor junior frontend engineers, conducting code reviews and elevating the team's technical capabilities
• You collaborate closely with product, design, and backend teams to deliver cohesive user experiences
• You evaluate and introduce new technologies and frameworks that improve our development velocity and product quality
• You maintain high standards for code quality, performance, testing, and accessibility
• You become a trusted technical advisor to leadership on all frontend architecture decisions

As our Senior Frontend Engineer and technical lead, you'll own:

Immediate Priorities (0-6 months)

• Frontend architecture and technical decision-making for our core platform
• Refactoring existing frontend systems to improve performance and maintainability
• Building new platform features that showcase our AI capabilities to enterprise users
• Establishing component library and design system foundations
• Setting up testing frameworks and CI/CD pipelines for frontend
• Code review processes and engineering standards

Growing Responsibilities (6-12 months)

• Mentoring and providing technical guidance to junior frontend engineers
• Performance optimization and monitoring systems
• Frontend infrastructure and build tooling improvements
• Cross-team collaboration on API design and integration patterns
• Technical documentation and onboarding processes

Long-term Vision (12+ months)

• Scaling the frontend engineering team and practices
• Defining frontend engineering hiring standards and interview processes
• Contributing to product and technical strategy discussions
• Building advanced features like real-time collaboration, AI-powered UIs, and developer tools

• 10+ years of frontend development experience with a proven track record of building complex, production-grade applications
• Expert-level knowledge of modern JavaScript/TypeScript with deep understanding of language features, patterns, and best practices
• Deep expertise in React.js and its ecosystem including hooks, context, performance optimization, and modern patterns
• Strong understanding of state management (Redux, MobX, Zustand, or similar) and when to apply different patterns
• Experience with modern build tools (Webpack, Vite, esbuild, etc.) and their configuration
• Proven ability to architect scalable frontend systems that handle complexity while remaining maintainable
• Experience with responsive design and cross-browser compatibility, ensuring consistent experiences across devices
• Strong understanding of web performance optimization including bundle size, rendering performance, and Core Web Vitals
• Experience with frontend testing frameworks and methodologies (Jest, React Testing Library, Playwright, Cypress)
• Track record of technical leadership including mentoring, code reviews, and establishing engineering standards

• Experience with GraphQL and real-time data handling (WebSockets, Server-Sent Events)
• Knowledge of WebAssembly and its applications in frontend development
• Experience with micro-frontend architectures or monorepo management
• Background in building developer tools, AI-powered applications, or code generation interfaces
• Contributions to open-source projects, especially in the React or JavaScript ecosystem
• Experience with advanced animations and complex UI interactions (Framer Motion, React Spring)
• Deep knowledge of accessibility standards (WCAG) and practical implementation
• Experience with design systems at scale and component library architecture
• Speaking engagements or technical writing demonstrating thought leadership
• Experience at high-growth startups or in technical leadership roles

• Competitive salary in a fast-growing AI startup ($140K-$165K) plus significant equity upside
• Comprehensive health, dental, and vision insurance for you and your family
• 401(k) with company match
• Generous PTO and parental leave
• Top-tier equipment and home office setup allowance
• Learning & development budget for conferences, courses, and books
• Direct collaboration with founders and exposure to cutting-edge AI technology
• Clear growth path to Staff Engineer, Principal Engineer, or Engineering Manager roles
• The opportunity to define how enterprises build software in the AI era
• Modern office in Cambridge's innovation hub at 1 Kendall Square
• Regular team events and activities

Who we are: Our Co-Founder and CTO is a Serial Gen AI Inventor who grew up in Pune, India, is a BITS Pilani graduate, and worked at NVIDIA's Pune office for 6 years (promoted 5 times in 6 years). After transferring to NVIDIA HQ in Santa Clara and making significant contributions, he completed dual Masters in Engineering and MBA from Harvard Business School. Our CEO is a successful Serial Entrepreneur who has built multiple companies.

How we work:

• We move Blitzy Fast: Time is our most precious asset. We make decisions quickly and ship solutions that matter. A good decision today beats a perfect decision next week.
• Championship Mindset: We operate like a professional sports team, winning through high standards, in-person collaboration, and focused execution.
• Passion for Invention: We're pushing the frontier of what's possible with AI and software development, requiring constant innovation and iteration.
• Low-Ego, High-Output Approach: We check our egos at the door and focus on delivering exceptional results for our customers.

We believe in being 'everyday athletes'—taking care of ourselves through proper sleep and movement so we can bring our best to work. This makes for a happier, more productive team that can sustain the pace of innovation.

This is a technical leadership role at a fast-growing startup. It requires:

• Comfort with ambiguity and rapid change as priorities evolve with our product and market
• Ability to context-switch between deep technical work, mentoring, and strategic planning
• Willingness to wear multiple hats from IC work to code reviews to architectural planning
• Excitement about building and refactoring simultaneously—improving existing systems while shipping new features
• Commitment to excellence even when moving fast—we ship quickly but maintain high quality standards
• Strong communication skills—you can explain technical concepts to both engineers and non-technical stakeholders
• Collaborative mindset—you work effectively with product, design, backend, and AI teams

If the idea of defining the frontend architecture for the next generation of AI-powered development tools excites you more than it intimidates you, we want to meet you.

We move quickly for the right candidates:

1. Initial Application Review (1-2 days)
2. Introductory call
3. Technical Deep Dive (60 minutes)
4. • System design focused on frontend architecture
   • Code review and refactoring discussion
5. Technical Interview 2 or Practical Exercise (take-home or onsite)
6. • Build a component or solve a real frontend challenge we're facing
7. Team Interviews (2-3 hours, can be split across days)
8. • Meet with CTO, backend engineers, and product team
   • Culture fit and collaboration assessment
9. Final Conversation with founders (60 minutes)
10. Reference Checks and offer (typically same day)

Total process: 7-10 days for strong candidates

Apply through this posting with:

• Resume highlighting your frontend architecture and leadership experience
• Portfolio or GitHub showcasing your best work
• Brief note on why you're excited about building AI-powered developer tools

Blitzy is an equal opportunity employer committed to building a diverse and inclusive team. We believe different perspectives make us stronger.

Ready to define the future of AI-powered software development? Apply now.