Senior Software Engineer - Full Stack

Every day, thousands of new companies are founded. Most will never matter. A few will change everything.

Harmonic helps startups get discovered by the investors, customers, partners, and talent that will change the trajectory of their company.

We are a living, breathing record of the innovation economy. Allowing our customers to understand who matters, what’s happening, where to look next, and how to make decisions.

We're doubling revenue annually, profitable, and backed with $30M from Craft, Floodgate, Sozo Ventures, and plenty of other industry leaders. We're committed to ensuring hundreds of billions of dollars find the right founders, so the innovations that matter most flourish. If that resonates, let's talk.

We are looking for full-stack engineers to join one of our three teams:

• Discovery. We build the intelligence layer behind Harmonic, transforming hundreds of fragmented, unstructured sources, from APIs and raw HTML to legal filings, into structured knowledge about startups, investors, and people. On top of that foundation, we're building an agentic research system that lets VCs explore the startup ecosystem through natural language and structured queries, surfacing breakout companies before anyone else.

• Flow. Flow is Harmonic's deal management system, built natively on top of our knowledge graph. Instead of forcing investors to sync data between a CRM and external sourcing tools, Flow makes Harmonic a first-class system of record. VCs can manage deals, track companies, and collaborate directly within the platform, the most intuitive and performant way to source, research, and triage opportunities in one place.

• Ecosystem. Ecosystem is focused on making Harmonic first-class wherever investors already work, and on bringing the data from those surfaces back into the product as core context for Scout.

• You have 5-8 years of experience building full-stack products at scale. This role leans roughly 70/30 back-end.

• You've ideally been a founding engineer, or joined a product early and helped scale it.

• You have a record of shipping high-quality product. We want to hear about the major releases you've driven over the past several years.

• You build with core CS principles and have a strong understanding of how to build highly performant products.

• You have experience building and scaling data pipelines for products that rely on large datasets.

• You're skilled at turning ambiguity into clarity: building scalable, performant, and observable systems from first principles while balancing technical, product, and organizational tradeoffs.

• You're customer obsessed. You love building products for customers and are always looking to improve their experience.

• You're methodical in how you build. You believe in being measured, in experimenting, and in learning quickly. We ship fast, learn, and iterate, but always in a methodical way.

• You have an interest in venture capital and the startup ecosystem.

• Own customer-facing features and experiences end to end, from the customer's perspective, so that what you ship works exceptionally well.

• Build scalable, performant, and observable systems from first principles, from the data and pipelines underneath a feature to the full-stack product experience on top of it.

• Ship fast, measure what happens, and iterate, treating every release as a chance to learn something real about the product and the customer.

• Work cross-functionally with Design, Product, and GTM to build with a customer-first mentality.

• Constantly question and explore how we can improve our product experience.

1. Recruiter Screening: 30 mins

2. Technical Screening (Debugging): 45 mins

3. Technical Screening (System Design): 45 mins

4. Technical Screening (Coding): 2 hrs

5. Behavioral intesrview with Head of Eng: 30 min

6. Chat with our CEO: 30 min

7. References

We are an Equal Opportunity Employer committed to recruiting, hiring and promoting qualified people of all backgrounds regardless of gender, race, color, creed, national origin, religion, age, marital status, pregnancy, physical or mental disability, sexual orientation, gender identity, military or veteran status, or any other basis protected by federal, state, or local law.