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Assistant Controller; Fintech

Job in Boston, Suffolk County, Massachusetts, 02298, USA
Listing for: Attivo Partners
Full Time position
Listed on 2026-01-29
Job specializations:
  • Finance & Banking
    Accounting Manager, Financial Reporting, Accounting & Finance, Tax Accountant
  • Accounting
    Accounting Manager, Financial Reporting, Accounting & Finance, Tax Accountant
Job Description & How to Apply Below
Position: Assistant Controller (Fintech)

Join the Rapidly Growing Team at Attivo Partners!

Are you dedicated to excellence and eager to advance your career? Passionate about technology and startups? Excited to work with some of the most innovative early‑stage companies in the world? If so, Attivo Partners is the place for you!

Attivo Partners is a fast‑growing full‑service finance and accounting consulting firm headquartered in San Francisco, with a presence in major startup hubs across the US. Our remote teams specialize in providing fractional CFO and accounting services to venture‑backed emerging growth clients, supporting their journey from inception to over $50M in revenue.

What We Offer
  • Collaborative Environment: Work alongside a talented team with extensive experience in venture‑backed companies. At Attivo, we believe in teamwork and value the unique insights and creativity each member brings.
  • Culture of Growth: We thrive on the challenges presented by diverse and exciting clients, offering unparalleled learning and professional development opportunities.
  • Mentorship and Training: We are committed to nurturing talent and providing ongoing mentoring and training to help you grow personally and professionally.
  • Flexibility: We understand the importance of balance and are dedicated to maintaining a culture that supports your career and personal life.
Our Values
  • Lasting Relationships: We build solid and enduring connections with our clients and team members.
  • Data‑Driven Insights: We leverage data to drive intelligent decisions and impactful results.
  • Growth‑Focused Mindset: We embrace opportunities for continuous improvement and innovation.
  • Collaboration‑First: We prioritize teamwork and believe the best solutions come from working together.
  • Culture‑Conscious: We foster a supportive and inclusive culture where everyone can thrive.

Join us at Attivo Partners and be part of a team that's shaping the future of finance and accounting for startups. Let's grow together!

Role Overview

The Assistant Controller – Fintech oversees end‑to‑end accounting for multiple Fintech clients, delivering high‑quality financial statements, analyses, models, and forecasts. This role serves as a Fintech accounting expert, partnering with clients and internal teams to build, scale, and optimize accounting operations. The Assistant Controller manages Attivo staff across month‑end close, AR/AP, payroll, and tax compliance, and works closely with the Fintech Practice Leader.

Ideal candidates bring experience in early‑stage Fintech environments, building financial models, and establishing accounting policies to support rapid growth.

Responsibilities
  • Manage all general accounting functions which includes performing month‑end close process, eliminations & consolidations, preparing and booking journal entries, account reconciliations and variance analysis
  • Prepare monthly consolidated client financials including fluctuation analysis and budget vs actual comparisons
  • Direct activities related to efficient customer cash collection and vendor payments and overall cash management and cash forecasting
  • Build financial models to help clients manage cash and make intelligent and proactive operational decisions
  • Analyze company operations to identify operational and cost efficiencies and implement solutions
  • Create and manage KPI Dashboards
  • Manage general HR responsibilities, including payroll, processing employee onboarding & offboarding, and benefits management
  • Oversee client tax‑related matters to ensure timely compliance
  • Lead annual US GAAP financial audits, as required
  • Manage and mentor accounting teams across all clients
Requirements
  • Desire to work side by side with multiple CFOs and want mentorship
  • Deep expertise in accounting with Seed‑, Series A, and Series B Fintech companies
  • Experience with standard software solutions:
    Quick Books Online, Xero, Netsuite, , Gusto, Expensify, Carta
  • Excellent written and verbal communication skills
  • Strong analytical and problem‑solving abilities
  • Independent judgment and decision‑making
  • Ability to manage multiple projects/priorities at a time
  • Professional curiosity & creativity
  • Passionate desire to learn & for continuous improvement
Qualifications
  • Bachelor’s degree in…
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