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645 Ventures is a venture capital firm managing over $550M in AUM across five funds, investing from pre-seed through growth stage in fintech, cybersecurity, B2B software, consumer, AI infrastructure, developer tools, and deep tech. The firm is known for its resource-intensive founder support model and proprietary software platform, Voyager.
As a Senior Associate Investor on the Investment & Research team, you will be responsible for sourcing, evaluating, and leading investments in seed, Series A, and growth-stage companies, with a focus on Fintech and B2B AI/Enterprise. You will work closely with one of 645's Co-Founders and Managing Partners, embedded in founder, developer, university, and entrepreneurial ecosystems to identify and invest in innovative, category-defining startups.
Key responsibilities include:
**Sourcing & Pipeline Management:** Source high-quality investment opportunities using proprietary technology and networks. Manage and vet the investment pipeline for highest-priority opportunities, organize sourcing and deal screening efforts, and conduct high-priority due diligence.
**Investment Evaluation & Execution:** Work with the full Investment & Research team and General Partners to negotiate, structure, and win competitive investments. Evaluate high-quality opportunities using proprietary technology and networks.
**Relationship Building:** Deepen relationships with top seed, early-stage, and growth investors, founders, accelerators, portfolio companies, universities, and other communities that source billion-dollar companies.
**Investment Strategy:** Support the firm's investment strategy to build a leading practice that sources, wins, and scales early-stage companies to billion-dollar growth stage. Identify technology market waves driving company growth.
**Collaboration:** Work with the firm's Engineering team to use and build innovative software and AI tools, and with the Portfolio Operations team to win competitive investments and support portfolio companies.
You will work from the New York City office at least four days per week. The role offers opportunity to grow into senior leadership within the organization and the venture capital industry.
**Requirements:**
- 3–6 years of experience in Venture Capital, Startups, or Angel investing
- If not previously a full-time venture investor: ability to translate technical and operational skills to strong investment acumen in Fintech and B2B AI/Enterprise categories
- If previously in Venture Capital: demonstrated ability to source high-quality investments that have exited or attracted competitive follow-on funding
- Access to high-quality entrepreneurial talent from leading fintech companies (e.g., Ramp, Coinbase, Kalshi, Robinhood, Revolut)
- Strong network in the startup community including exceptional founders, venture capitalists, and access to elite deal flow sources with exits in the $1B+ range
- Detail-oriented financial modeling and analytical skills
- Excellent written and verbal communication skills
- Strong ability to listen, understand, connect, and build relationships
- Time management, team coordination, and multitasking ability
