Twelve engagements since 2019

Interim CFO engagements: references

Since 2019, Sebastian Janus has taken on 12 mandates, 11 of them as interim CFO – mostly in B2B software and SaaS companies with 30 to 500 employees, owned by private equity firms and venture capital investors. This page lists every engagement with its client, brief, scope and outcome, ordered by start date – the most recent first. Published with the consent of everyone involved.

Which engagement matches your situation?

nugrow has delivered 350 interim assignments and advisory projects in total. This selection documents the engagements led by Sebastian Janus: 12 mandates since 2019, 11 of them as interim CFO. Filter by company context and assignment; categories may overlap.

All twelve engagements

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Gingco Systems

Interim CFO · March to August 2026
B2B SaaS, more than 40 employees · portfolio company of Main Capital Partners
Engagement type: CFO transition and post-merger integration

  • Operational responsibility for the finance department
  • Sparring partner for management and shareholders
  • Support for add-on acquisitions under the buy-and-build strategy
  • PE-grade reporting, forecasting and KPI framework built
  • Finance organisation, processes and systems structured
  • Support for the switch from a licence to a SaaS pricing model

Deliverable: Built PE-standard reporting, forecasting and a KPI system.

Relevant when: A CFO transition after closing or during buy-and-build.

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Cropster

Interim CFO · June to September 2025
B2B SaaS, more than 100 employees · portfolio company of Verdane
Engagement type: CFO transition and post-merger integration

  • Operational responsibility for the finance department with five employees
  • Sparring partner for management and shareholders
  • Support for M&A activity under the buy-and-build strategy
  • PE-grade reporting, forecasting and KPI framework
  • Finance organisation, processes and systems structured

Deliverable: Led the finance team and structured reporting, processes and systems.

Relevant when: Finance operations and acquisitions need to be managed in parallel.

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Culami

Interim CFO · January to May 2025
B2B trading, more than 30 employees · portfolio company of AEM Capital, Munich
Engagement type: CFO transition and post-merger integration

  • Integrated financial planning for 2025 to 2027 built
  • Scalable finance setup with documented processes created
  • Onboarding of the incoming CFO supported
  • Finance-side lead for the implementation of Microsoft Dynamics 365 Business Central

Deliverable: Built integrated planning, led ERP implementation and supported the successor’s onboarding.

Relevant when: A system change combined with an orderly CFO handover.

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AlfaDocs

Senior Financial Advisor · since July 2024
B2B SaaS, more than 70 employees · backed by BayBG
Engagement type: support through a growth and financing phase

  • Support for day-to-day finance leadership
  • Preparation and execution of revenue-based financing with Recap
  • Financial modelling and cash flow reporting

Deliverable: Supported revenue-based financing, financial modelling and cash-flow reporting.

Relevant when: Growth financing with ongoing finance support.

Read the detailed caseEnquire about a similar need

Unicepta

Interim CFO · April to November 2023
B2B software, more than 500 employees · portfolio company of Paragon Partners
Engagement type: exit preparation and restructuring

  • Operational responsibility for the finance department with 15 employees
  • Financial factbook produced together with KPMG
  • Consolidation of nine entities implemented in LucaNet
  • Restructuring successfully negotiated and implemented
  • Company prepared for a successful exit process

Deliverable: Prepared a financial factbook and introduced consolidation for nine entities.

Relevant when: Exit readiness, restructuring or group accounts.

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Papershift

Interim CFO · August 2021 to March 2023
B2B HR tech SaaS, more than 50 employees · backed by eCapital
Engagement type: first-time CFO function and fundraising

  • Operational responsibility for the finance function
  • Preparation and execution of a Series A round of 4 million US dollars
  • Financial modelling, due diligence and investor reporting

Deliverable: Supported the Series A process with financial modelling, due diligence and investor reporting.

Relevant when: Establishing a first CFO function and preparing a funding round.

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elopage (now ablefy)

Interim CFO · January to May 2021
B2B payment SaaS, more than 100 employees
Engagement type: CFO transition during the Series A

  • Preparation and process lead for a Series A round of 38 million US dollars with Target Global
  • Financial modelling, due diligence and transaction support

Deliverable: Led the Series A process with financial modelling and due diligence.

Relevant when: A CFO transition during a funding round.

Enquire about a similar need

Advocado

Interim CFO · August 2020 to January 2021
B2C legal tech platform, more than 40 employees
Engagement type: bridge engagement during a financing phase

  • Preparation and process lead for the Series A financing
  • Financial modelling, due diligence and transaction support

Deliverable: Prepared and led the Series A process.

Relevant when: Bridging finance leadership during a funding phase.

Enquire about a similar need

VAPA

Interim CFO · March to October 2020
B2B SaaS for AI-driven Amazon marketing, more than 30 employees
Engagement type: CFO transition and Series A preparation

  • Preparation and process lead for the Series A financing
  • Financial modelling, due diligence and transaction support

Deliverable: Supported Series A preparation, financial modelling and due diligence.

Relevant when: Preparing a funding round during a CFO transition.

Enquire about a similar need

DataGuard

Interim CFO · September 2019 to February 2020
B2B legal tech SaaS for data protection, more than 100 employees
Engagement type: CFO transition during the Series A

  • Preparation and process lead for a Series A round of 20 million US dollars with One Peak
  • Financial modelling, due diligence and transaction support

Deliverable: Led the Series A process with modelling and transaction support.

Relevant when: New CFO leadership and preparation for funding.

Enquire about a similar need

Staffbase

Interim CFO · April 2019 to May 2021
B2B SaaS for employee apps, more than 300 employees · backed by Insight Partners
Engagement type: scaling, consolidation and transition

  • Preparation and process lead for a Series C round of 23 million US dollars with Insight Partners
  • New close processes built for the consolidation of all entities in Germany, the United States and the United Kingdom

Deliverable: Supported Series C and built close processes across three countries.

Relevant when: International growth and consolidated board figures.

Read the detailed caseEnquire about a similar need

VMRay

Interim CFO · January to April 2019
B2B SaaS for IT security, more than 120 employees
Engagement type: bridge engagement during Series B preparation

  • Preparation and process lead for a Series B round of 10 million US dollars with Digital+
  • Financial modelling, due diligence and transaction support

Deliverable: Led the Series B process with financial modelling and due diligence.

Relevant when: Temporary CFO support ahead of Series B.

Enquire about a similar need

The engagements in numbers

  • 12 mandates, 11 of them as interim CFO, since January 2019, plus four years as CFO for e-commerce at a listed retail group
  • Seven private equity firms and venture capital investors as shareholders on the other side of the table: Main Capital Partners, Verdane, Paragon Partners, AEM Capital, Insight Partners, eCapital and BayBG
  • Series A to C funding rounds totalling around 95 million US dollars prepared and supported – among others with Target Global, Insight Partners, One Peak and Digital+
  • Company sizes from 30 to more than 500 employees, finance teams of one to 15 people led
  • Consolidation structure for nine entities built, plus close processes across Germany, the United States and the United Kingdom
  • All five engagement types covered: transition, bridge, post-merger integration, exit preparation and restructuring

What these engagements have in common

The client is rarely the only party at the table. In eleven of the twelve engagements there was, alongside the management team, an institutional shareholder with its own reporting standard, its own investment committee and a time horizon set by the fund. A large part of the work is translating between those two sets of expectations.

The trigger is temporary, the structure should last. Whether it is a vacancy, an acquisition, a funding round or preparation for a sale: the peak load lasts four to twelve months. What holds afterwards is not presence, but a documented close calendar, defined approval paths and a successor who has been properly onboarded.

Sequence matters more than tooling. In almost every engagement it was tempting to start with a system change. What has always worked is the other sequence: reporting capability and cash flow forecast first, then planning, then systems.

Frequently asked questions about these references

Which industries and company sizes does the experience cover?

The focus is on B2B software and SaaS with 30 to more than 500 employees. Added to that are legal tech, HR tech, IT security, payments, a B2B trading company and, from the years before the interim engagements, four years of e-commerce retail within a corporate group. Regionally, mostly Germany, plus Austria and Italy; we work both remotely and on site.

Which private equity firms has there already been collaboration with?

On the shareholder side these were Main Capital Partners, Verdane, Paragon Partners, AEM Capital, Insight Partners, eCapital and BayBG. In financing processes, Target Global, One Peak, Digital+ and Recap were added.

Which systems were implemented or used in these engagements?

Among others LucaNet for the consolidation of nine entities, Microsoft Dynamics 365 Business Central as the ERP, DATEV, Sage, NetSuite, Odoo, weclapp, Xero, Agicap, Candis, Spendesk, Pleo, Moss, Qonto, Stripe and Klarna. A detailed assessment of finance software is available in our tool database.

Can reference calls be arranged?

Yes. After an initial conversation about the specific brief, we put you in touch with contacts from comparable engagements – after checking with everyone involved.

Further reading

Detailed case descriptions

Seven of these mandates are written up in full as anonymised case studies – with starting position, brief, scope, approach, outcome and duration. No company names, but with sector, size and type of shareholder.

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