Senior Product Engineer - Fullstack

Help the best ideas win. Most engineers build products that help a single company succeed. At Harmonic, you help the next generation of incredible companies get discovered. Harmonic helps investors, acquirers, and operators discover the next generation of startups before they're obvious. When a great company gets discovered earlier, it can unlock funding, customers, partnerships, acquisitions, and hiring opportunities that otherwise may never have happened. The result is a rare form of second-order impact: your work doesn't just improve one product, it helps thousands of startups across every industry get discovered, reach their potential, and drive value for millions of others.

Join a company at an inflection point. Harmonic has already established itself as the leader in startup discovery and is trusted by many of the most sophisticated organizations in technology, including OpenAI, Anthropic, General Catalyst, Kleiner Perkins, Brex, and Notion. We are growing more than 100% year-over-year and have years of runway, but we're still early in the next phase of the business. The engineers joining today will have an outsized role in shaping the product, customer experience, and direction of the company as it scales.

Work on genuinely difficult technical problems. Flow combines customer-specific relationship data with one of the largest startup knowledge graphs in the world, spanning tens of millions of companies, hundreds of millions of people, and hundreds of attributes per entity. Building products on top of that foundation requires solving hard problems across search, recommendations, ranking systems, data infrastructure, knowledge graphs, and AI-powered workflows. Few teams get the opportunity to work with this combination of scale, complexity, and real-world impac

Role Requirements

Looking for senior roles with a focus on customer and product-centric engineers.
Emphasis on both technical skills and cultural alignment, especially the ability to articulate work with a customer impact focus.

Seniority
5 -​ 8 years of experience as a full-​stack engineer building web apps that manages significant data

Work experience
Clear progression at high-​growth,​ top-​VC backed startups

Experience implementing web applications that manage large amounts of data (e.​g.​,​ Notion/Airtable or others with a CRM component)

Education
CS or other technical degree from a top 50 or reputable university

Hard skills
Proficient across the entire stack including Python,​ GraphQL,​ React,​ and Go with an ideal lean of 70% backend and 30% frontend

Experience designing and implementing GraphQL APIs on top of large data sources

Soft skills
Highly customer-​ and product-​centric thinking (e.​g.​,​ asks good questions about the product,​ can explain what problem they were solving for which user group)

High energy/enthusiasm and strong communication skills to drive positive team contributions in both technical and non-​technical discussions

Candidate Requirements

Must have strong front-end infrastructure and back-end development skills.
Experience with data-heavy products and the ability to scale backend services is crucial.

Miscellaneous
Passionate and/or interested in Harmonic's core product and company

Compensation and Logistics

Compensation is competitive but not at the highest market range, focusing on long-term stability.
Role is based in New York; open to senior candidates with growth potential.

Ideal Candidate Profile

Engineers who prioritize performance, have a customer-first mindset, and use AI as a tool, not a solution.
Looking for candidates with a mix of startup agility and larger company experience.

Growth and Development Opportunities

Potential for candidates to impact the discovery of new startups.
Opportunities for future founders to build and innovate within the company.