Sébastien Doat
Founding Partner & CFO | Iter Advisors – On-Demand CFO Services for Tech Companies @ Iter Advisors
About
Twelve years ago, I walked into my first startup as a finance consultant. The founder looked at me and said, "I have no idea if we're making money or burning cash." That moment changed everything. Today, as Partner at Iter Advisors and a Fractional CFO, I help tech founders answer that question—and the harder ones: Can we scale? Will investors believe in us? I lead a team of 15+ finance specialists serving 85+ recurring clients across SaaS, FinTech, DeepTech, E-Commerce, and Renewable Energy. My mission? Transform financial operations into a strategic growth engine. The numbers: Over €65M in funding secured, including a €50M Series A for Solarmente (renewable energy), €7M ARR for Happy Scribe (AI/SaaS), €3M for Equito (FinTech), and €2.2M for Impact Plus (AdTech). I've scaled companies from 0 to $7.4M ARR as CFO of Carts Guru, led M&A acquisitions, and built finance functions that investors trust and founders rely on. But here's what really matters: I don't just deliver financial statements—I deliver clarity, confidence, and strategic direction. Using modern data analytics (Python, Snowflake, dbt, Metabase) and AI workflow automation (n8n, Make, LLMs), I automate manual processes, build predictive models, and provide real-time insights. One client reduced financial closing time by 30%. Another secured Series A funding in 6 months. My approach: Understand the business deeply, align finance with strategy, and use data to unlock growth. Whether you're pre-seed or Series B, bootstrapped or venture-backed, I bring full-time CFO expertise without the full-time cost. What I bring: • Fundraising: €65M+ raised across equity, debt, and non-dilutive financing • Operations: Scaled Carts Guru 0→$7.4M ARR as CFO & GM Europe • M&A: Led acquisitions at Mama Shelter and Solarmente • Tech stack: Python, Snowflake, dbt, NetSuite, SAP, AI automation • Board advisory: Equito (FinTech), NuuBB (Cybersecurity), Solarmente (Renewable Energy) • SaaS metrics: ARR/MRR, CAC/LTV, unit economics Beyond client work, I'm a mentor and speaker at Barcelona Finance Hub, Wilco, Pôle Action Media, TBS Business School, and IDEM. I serve on the boards of Equito, NuuBB and previously at Solarmente. Background: Dual Master's degrees (Business & Finance, Accounting & Audit - DSCG), Big 4-adjacent experience at ACA Nexia, thePowerMBA. Fluent in English, Spanish and French. Let's connect if you're building something ambitious and need a finance partner who speaks both numbers and strategy.
Spain
Barcelona
Management Consulting
AI, CFO Advisory, Part-Time CFO Services, Cash Flow Management, Financial Planning and Analysis (FP&A), Fundraising, Due Diligence, Data Analytics, Python (Programming Language), dbt, MetaBase, Snowflake, Transaction services, Internal Controls, Mergers & Acquisitions (M&A), Deal Sourcing, Investment Analysis, Business Development, International Expansion, Retail Operations
Experience

Founding Partner & CFO | Iter Advisors – On-Demand CFO Services for Tech Companies
Barcelona, Catalonia, Spain
15+ Finance experts | Supporting 85+ clients across Europe & USA As CFO & Partner at Iter Advisors, I lead a team of dedicated, on-demand CFOs and finance specialists serving +85 recurring clients in the tech sector. We provide tailored financial expertise to support growth, optimize financial strategy, and drive operational efficiencies for innovative companies across Europe and the USA. www.iteradvisors.com

Financial Advisor | Eltex - Leader in residential electrification platform in Europe
Barcelona, Catalonia, Spain
As Financial Advisor at Eltex, I provide strategic financial advisory to the CEO and board as the company scales its pan-European operations across solar, heat pumps, batteries, and EV charging. Key Achievements: • CFO Search & Talent Strategy: Leading the executive search for a full-time CFO to own Finance and Legal functions, aligning the hire with the board's vision and the company's AI-first culture. • Interim Finance Coverage: Ensuring operational continuity during the finance leadership transition, covering critical end-of-month processes, compliance filings, and investor reporting. • Phantom Shares & Compensation Plan: Designing and deploying the phantom shares program and compensation plan for the group.

Fractional CFO | Equito – Crowd-Investing Platform
Barcelona, Catalonia, Spain
As Fractional CFO at Equito (equito.app), a fast-growing crowd-investing platform making private investments accessible to everyone, I lead financial strategy and operations to strengthen the company’s scalability and investor readiness. My mission is to optimize financial processes, implement financial infrastructure, and support fundraising efforts in a highly regulated FinTech environment. Key Achievements: • Financial Modeling & Scenario Planning: Designed a robust financial model and multi-scenario forecasts to support Equito’s ambitious growth and fundraising plans. • Fundraising Support: Successfully contributed to securing over €3M in equity and non-dilutive financing. • ERP Implementation: Implemented a comprehensive ERP system to streamline financial operations and improve data accuracy. Core Responsibilities and Impact: • Finance & Legal Structuring: Established finance and legal frameworks tailored to Equito’s dual compliance requirements (financial markets and crowdfunding regulation). • Process & Governance Improvement: Built financial controls and processes aligned with regulatory and internal audit standards. • Strategic Advisory: Act as a close partner to the CEO and investors, providing financial insights to guide strategic decisions.

Fractional CFO | Happy Scribe – AI-Driven Transcription Platform
Barcelona, Catalonia, Spain
100% Bootstrapped | €7M ARR | Headcount: 45+ As Fractional CFO at Happy Scribe, a profitable and fully bootstrapped AI transcription platform, I oversee essential financial operations to support the company’s continued growth. My focus is on financial reporting, budgeting, and the mentorship of the finance team, ensuring accurate financial oversight and effective internal processes. Key Achievements: • Financial Reporting & Budgeting: Spearheaded financial reporting and budgeting processes, providing data-driven insights to guide strategic decisions. • Accounting Supervision: Ensured accuracy and compliance in accounting, enhancing financial reliability for a bootstrapped, high-growth company. Core Responsibilities and Impact: • Internal Process Development: Monitored and refined internal processes to improve operational efficiency and align with growth objectives. • Finance Team Mentorship: Mentored the Finance Controller and a team of 3, fostering skills and aligning efforts to maintain financial health. • Strategic Financial Oversight: Delivered comprehensive budgeting, forecasting, and reporting to support Happy Scribe’s self-sustained growth and market expansion.

Fractional CFO | Solarmente – Renewable Energy Solutions
Barcelona, Catalonia, Spain
Spain & USA | Headcount: 110 | €50M Series A raised | €8.2M Sales Volume As Fractional CFO at Solarmente, I provided strategic financial leadership, corporate advisory, and tech integration to support the company’s rapid growth and operational scalability across its Spain and U.S. markets. My focus spanned finance, M&A, governance, and team mentorship, building a robust foundation for sustainable expansion. Key Achievements: • €50M Investment Raised: Secured €50 million from GNE Finance in 2022, fueling Solarmente’s expansion and product development initiatives. • M&A Leadership: Led the acquisition of Eltex in 2024, expanding Solarmente’s team to 110 employees and increasing operational capacity. Core Responsibilities and Impact: • Tech Stack Integration: Integrated essential financial tools, including Stripe for revenue management, Payhawk for accounts payable, Payfit for payroll processing, and Vuala for invoice recovery, streamlining financial operations and enhancing data accuracy. • Accounting Audit: Conducted a thorough accounting audit to achieve a clean audit status, ensuring transparency and regulatory compliance. • Mentorship and Team Development: Mentored the Head of Finance and the Finance Team, establishing a fully operational finance department that aligns with Solarmente’s strategic vision. • Corporate Advisory and Governance: Advised executive leadership on governance, ensuring compliance with US GAAP and IFRS, and maintaining strong corporate governance practices. • Strategic Financial Planning: Developed a comprehensive financial plan, allocating resources strategically to meet growth targets and operational demands. • Cash Flow & Credit Management: Strengthened cash flow and credit management processes, supporting operational resilience and financial health on week-to-week basis.

Fractional CFO & BA | NuuBB (Groupe MaSolution IT) – SaaS Cybersecurity
Barcelona, Catalonia, Spain
Finance Leadership | €2.5M Debt Financing | Headcount: 35+ | Finance Team of 3 As Fractional CFO at NuuBB, I was instrumental in establishing and scaling the company’s SaaS cybersecurity and hardware reselling operations. I provided strategic financial leadership, implemented tech integrations, and fostered a robust budget management culture to support sustainable growth. Key Achievements: • €2.5M Debt Financing Secured: Raised €2.5 million to fund initial operations, enabling market entry and expansion. • Business Launch & Development: Built and launched NuuBB’s SaaS cybersecurity, driving successful positioning and growth. • Tech Stack Integration: Successfully implemented a tech stack for revenue and CRM management (TeamLeader) and accounts payable & credit card management (Spendesk), streamlining financial operations. Core Responsibilities and Impact: • Strategic Financial Oversight: Directed financial strategy and operational planning, aligning resources with growth objectives. • Company Budget Culture: Established a strong budget culture, conducting quarterly gap analysis, identifying deviations, and executing corrective actions to maintain financial alignment. • Finance Team Leadership: Supervised a finance team of 3, building efficient processes to support team development and business scalability. • Governance & Compliance: Ensured compliance and effective risk management (ISO 27001), reinforcing financial integrity and stability. • Resource Allocation & Optimization: Managed budget planning, resource allocation, and adjustments, strengthening financial health for continuous growth.

Fractional CFO & Financial Advisor
Rubiko
Barcelone, Catalogne, Espagne
SaaS company branch launched & started from scratch, e-gaming customer agency scaled to a 70 people team

CFO & General Manager | Carts Guru – Multichannel Marketing Automation Platform
Région de Barcelone, Espagne
Led comprehensive financial, strategic, and operational initiatives for a multichannel marketing automation SaaS platform, scaling the company from inception to $7.4M ARR with a team of 65+ employees across Spain and the USA. Managed Finance, Legal, Tax, HR, and Administrative functions to optimize financial performance and strengthen corporate governance. KEY ACHIEVEMENTS: Fundraising & Capital Management • Raised $7.2M in seed funding through strategic financial rounds • Secured financing from banks and private investors to fuel rapid growth Global Financial Compliance • Ensured full compliance with US GAAP and IFRS • Established streamlined procedures across international subsidiaries and holding companies Strategic Financial Planning & Reporting • Designed and implemented comprehensive business plans • Ongoing monthly monitoring and reporting to Board and investors • Enabled data-driven strategic decisions Cash Flow & Credit Management • Drove cash flow optimization and credit management • Maintained liquidity and operational flexibility during hyper-growth phase Corporate Governance & HR Oversight • Managed corporate governance, aligning policies with legal, tax, labor, and compliance requirements • Supervised payroll and HR administration • Maintained strong foundation in team and employment management Team Leadership • Led finance and administrative team of 4 • Promoted culture of efficiency, continuous improvement, and cross departmental support Stock Options Plan • Structured and managed stock option plans • Incentivized and retained top talent aligned with company growth goals SKILLS DEVELOPED: SaaS Financial Management | US GAAP & IFRS | International Finance | HyperGrowth Scaling | Multi-Functional Leadership | Stock Option Administration
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