Senior Finance & Accounting Lead

At Castor, we’re modernizing the backbone of clinical research

Clinical trials are the gatekeepers of human health, yet the industry is still bogged down by fragmented, manual processes that can waste time and exclude patient populations. At Castor, we are building the operating system for the next era of clinical research.

We provide a modular cloud platform designed to run trials end-to-end. Our foundation is a robust Electronic Data Capture (EDC) system, supported by eConsent for recruitment and screening and eCOA to accurately capture patient reported outcomes. We don’t just stop at data collection; we use Castor Catalyst (our high-precision AI automation) to strip away the manual effort that historically makes research slow and expensive.

How we work: Trust over tracking

We are a remote-first company built on the belief that talented people do their best work when they have the agency to manage their own lives. We believe that high performance requires a foundation of trust, health, and cutting-edge support.

• Work-life integration: We don't believe in performative presence. We trust you to own your schedule and show up for your team, while also making space for your life outside of work.
• Deep work & async: We protect your time. We prioritize thoughtful, asynchronous communication so you can focus on solving hard problems without a calendar full of status update meetings.
• Radical candor: We value the truth over hierarchy. We give and receive direct feedback because that’s how we grow—as individuals and as a company.
  

Your mission and impact

As Senior Finance & Accounting Lead you won't just do accounting, or FP&A, you’ll be hands on with a mix of both. You'll own the annual audit end-to-end, work on revenue recognition, manage external advisors, and build the automated workflows that free up the whole team to focus on what matters. 

Who are you

• You don't just move numbers, you look for the story behind them and ways to improve the systems that generate them.
• You are a continuous learner, always looking for a better way to work, especially with Ai.
• You thrive in autonomy and take pride in the accuracy and reliability of your output.
  

What you'll be doing

• Lead the end-to-end financial accounting process, ensuring precision in monthly, quarterly, and annual reporting.
• Assist with financial modelling, budgeting, and board-level reporting to support long-term business goals.
• Design and implement scalable financial systems and internal controls that enhance efficiency.
• Manage tax filings, statutory audits, and regulatory requirements to keep the business ahead of the curve.
• Collaborate across departments to provide financial clarity and support data-driven decision-making.
  

What you'll bring

• 3–6 years of experience in finance or accounting, preferably including time at a public accounting  firm
• Strong technical accounting background: you're comfortable with topics such as revenue recognition (IFRS 15 / ASC 606), ESOP accounting, accruals, deferred expenses.
• Exposure to FP&A responsibilities: budgeting, forecasting, variance analysis.
• Advanced Google Sheets and/or Excel skills; you build formulas and automate workflows, not just fill in cells.
  

Nice to have:

• Dutch language skills.
• Knowledge of Dutch GAAP.
• Chartered Accountant (RA/ACA/ACCA) qualification, or actively working towards one.
  

Our preference is for this role to be based in CET +/-2. Unfortunately at this moment we cannot accept applications from France, Spain, Belgium, Germany and Switzerland.

How we invest in you

High performance isn't sustainable without real support. We provide the infrastructure you need to stay healthy, focused, and rewarded.

• Rest is non-negotiable: Unlimited annual leave with 25-day minimum. We don’t just allow time off; we expect you to take it.
• Downtime weeks: Once a quarter, the whole company shifts gears. No new shipping—just a week for deep focus, learning, or catching up so we can start the next quarter fresh.
• AI-first culture: We provide the tools and training to ensure you’re spending your energy on high-value work, not manual repetition.
• Real ownership: All Castor team members are offered options through our Employee Stock Option Plan (ESOP).
• Comprehensive wellbeing: Free access to Open Up for mental health, specialized sleep courses (for you and your family), and a budget to make your home office a place you actually want to be.
• Annual bonus: A guaranteed "Happy Holidays" bonus every December.

Belonging at Castor

We build products to make research accessible to everyone, and we believe our team should reflect that same diversity.

Our remote setup is designed to support you as a whole person—your family, your mental health, and your authentic self. We don't care about your background as much as we care about your perspective and your expertise. We strongly encourage applications from women, people of color, and the LGBTQ+ community. Please feel free to share the pronouns you use (for example she/her/hers, he/her/his, they/them/theirs, etc.).