Staff Product Engineer

Summation • Bellevue, WA

1d • $220,000 - $250,000 • Hybrid

About The Position

Summation is building the future of business planning and analytics by bridging the gap between data and decision-making. We empower organizations to transform complex data into clear, actionable insights that drive business outcomes. Our AI-native platform pairs advanced data models with intuitive workflows to make enterprise performance management simple, collaborative, and effective.

As a Staff Product Engineer at Summation, you’ll be the senior front-end leader on our team, reporting directly to our CTO and owning the front-end architecture and experience of our product end to end. This is a hands-on, deeply technical role where you’ll spend your time building, not just advising, and is a role for someone with a sharp product sense who has designed and shipped polished, ambitious products from the ground up.

You’ll set the technical direction and quality bar for our front end and establish the patterns the rest of the team builds against. Our product is analytics-rich and highly interactive, which makes the front end one of the hardest and most important parts of what we do: dense, data-heavy interfaces that still need to feel fast, clear, and effortless. You’ll partner closely with the CTO, our Founding Designer, and product team to turn ambitious ideas into interfaces that perform.

As a Series A company approaching product-market fit with our first customers, we’re at the point where the front-end foundations you lay will define how well we scale. You’ll have influence over both architecture and product direction, the autonomy to make consequential decisions, and direct access to the people setting company strategy. If you’re energized by ownership, thrive in the ambiguity of an early-stage startup, and want your work to shape the product and the team around it, this is the role for you.

Requirements

• 8+ years of software engineering experience, including 4+ years of dedicated, hands-on front-end product development — building products, not solely platform or library work.
• Experience building and shipping a product from zero to one with end-to-end ownership, as a founding or early engineer at a startup or with equivalent ownership inside a larger company
• A track record of shipping to internal or external users and iterating based on their feedback
• Strong communication and problem-solving skills, ability to work with cross-functional teams
• Proficiency in Python, TypeScript, JavaScript, or similar languages

Nice To Haves

• Hands-on experience building interfaces backed by LLMs or agent frameworks
• Background in analytics, data visualization, or AI-driven products
• Familiarity with financial software, models, or data
• Experience leading or mentoring engineers (not required for this role)

Responsibilities

• Own the front-end architecture and user experience of our product end to end from concept through shipping and iteration
• Set the bar for front-end quality, patterns, and performance, and help establish the standards the team builds against
• Partner directly with the CTO, Founding Designer, and product team to shape direction and translate ambitious ideas into polished, performant interfaces
• Build responsive, scalable, data-dense interfaces for analytics and AI-driven workflows
• Bring a strong product perspective to engineering decisions, advocating for the user at every step

Benefits

• Competitive salary and equity options
• Flexible (unlimited) paid time off
• Medical, dental, and vision benefits for you and your family
• 401(k) plan
• Parental leave
• A collaborative environment where your voice matters
• Opportunities for growth and career development
• The chance to work on cutting-edge technology that is transforming how businesses plan and execute

What This Job Offers

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