Senior Frontend Engineer

ATOMS Careers page • New York, NY

9d • $176,000 - $242,000 • Onsite

About The Position

We’re looking for a Senior Frontend Engineer to help build and scale Picnic’s real-time logistics and operations platforms. This role is ideal for someone who thrives in ambiguity, enjoys working on complex, high-performance systems, and wants to shape frontend architecture that directly powers real-world operations. You’ll work across web and mobile surfaces, partner closely with backend and operations teams, and play a key role in defining how we build, ship, and scale frontend systems at Picnic.

Requirements

• 3+ years of experience in software engineering, with deep frontend expertise
• Strong experience with TypeScript and modern web application development
• Solid understanding of client networking, async programming, performance optimization, caching, and client-side state management
• Experience integrating with GraphQL and REST APIs
• Proven ability to lead technical initiatives and influence architecture and best practices
• Experience mentoring junior engineers and supporting team growth
• Comfort working outside your immediate comfort zone and adapting as the product and team evolve

Nice To Haves

• Experience building or operating delivery, logistics, or real-time systems at scale
• Full-stack experience and an understanding of backend tradeoffs and system design
• Track record of improving developer productivity through tooling, patterns, or process improvements
• Familiarity with modern frontend architecture best practices, including performance, security, and usability

Responsibilities

• Design and build high-performance React applications powered by WebSockets, SSE, and GraphQL subscriptions.
• Contribute to and shape our courier mobile apps built in React Native.
• Lead technical design for complex features and systems, from initial architecture through production rollout
• Own projects end-to-end, driving execution, technical decisions, and cross-functional alignment
• Improve frontend reliability, latency, and scalability in a real-time, high-throughput environment
• Lead debugging, incident response, and performance investigations for frontend systems
• Mentor and coach engineers, raising the bar for frontend engineering across the team

Benefits

• Medical, dental, and vision insurance (multiple plans, incl. HSA options).
• Company-paid life and disability insurance (short- and long-term).
• Voluntary insurance: accident, critical illness, hospital indemnity.
• Optional supplemental life insurance for self, spouse, and children.
• Pet insurance discount.
• 401(k).
• Health Savings Account (HSA)
• Flexible Spending Accounts (Healthcare, Dependent Care, Commuter)
• Discretionary vacation days
• 8 paid holidays per year
• Paid sick time
• Paid Bereavement leave
• Paid Parental Leave
• Equity awards
• Annual performance-based bonus

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed