Open to opportunities

Sergi Nieves

@serginieves

Message

I am a Fractional CFO & COO driving growth, profitability, and operational scaling.

Spain

Message

What I'm looking for

I seek a senior finance leadership role in a high-growth tech or Web3 company where I can scale operations, optimize cash flow, build FP&A frameworks, and partner with founders in a collaborative, KPI-driven environment.

I am a finance and operations leader who has managed financial operations for 20+ start-ups, overseeing over €80 million in cumulative revenue and delivering measurable results such as a 10x increase in EBITDA and 4x revenue growth.

I design and lead financial planning, budgeting, forecasting, and KPI-driven performance reporting, which contributed to a 50% increase in consolidated client revenue and stronger cash flow and working capital. I also structure tailored capital solutions with banks and financial institutions to support company-specific needs.

My background includes founding and scaling a service-tech startup where I led operations, finance, product budgets, and acquisition funnel optimization, and earlier roles in M&A transaction services and audit at PwC where I performed financial due diligence and independent business reviews.

I combine rigorous financial discipline, technical tooling (advanced Excel, SQL, analytics and Web3 tools) and hands-on leadership to help high-growth companies scale. I bring a commercial mindset, problem-solving focus, and a commitment to building clear processes and measurable KPIs.

Experience

Work history, roles, and key accomplishments

Current

Fractional CFO & COO

Current

Heneco

Jun 2020 - Present (5 years 2 months)

Managed financial operations for 20+ startups overseeing €80M+ cumulative revenue; scaled Heneco's EBITDA 10x and revenue 4x via cost control, KPI-driven management, and process improvements. Designed FP&A, forecasting and capital solutions, and led a team of 12 internal staff plus 20+ external contributors.

Financial Planning Budgeting & Forecasting Cash Flow Management KPI’S Cost Control Team Leadership

Business Analyst

Badi

Jul 2019 - Mar 2020 (8 months)

Conducted financial and market analytics to support international expansion and product launches, leading growth campaign analytics in London, Berlin, and New York. Validated Badi Homes product-market fit through demand, pricing, and competitive analysis to align investment with KPI trends.

Financial Analysis Market Research Growth Analytics KPI Tracking Pricing Analysis Product Market Fit Excel

Co-Founder & Head of Ops & Finance

MyToquer

May 2018 - Dec 2019 (1 year 7 months)

Founded and led operations and finance from ideation to growth, building end-to-end financial models, cost structures, and operational KPIs. Drove digital acquisition, optimized the funnel with marketing analytics, and managed budgets for product, marketing, and BD.

Financial Modeling Operational Management Budget Management Marketing Analytics Cost Structure Design KPIs

Consultant, M&A Transaction Services

PricewaterhouseCoopers

Jul 2017 - May 2018 (10 months)

Performed financial due diligence and independent business reviews across industries, analyzing recurring EBITDA, net debt quality, working capital seasonality, and cash flow. Delivered risk and value-driver insights to support buy- and sell-side transaction decisions.

Due Diligence EBITDA Net Debt Assessment Working Capital Financial Reporting

Audit Assistant

PricewaterhouseCoopers

Sep 2015 - Jun 2017 (1 year 9 months)

Supported financial audits for multinational clients with focus on internal control, compliance, and financial statement review. Planned and executed audit engagements, liaised with CFOs and finance teams, and finalized audit deliverables across tech, industrial, and retail sectors.

Financial Auditing Internal Controls Financial Statement Audits Compliance Audit Plans Risk Assessment