Why this role exists
As PortSwigger scales beyond $50M in revenue, managing planning cycles and cost structures with precision is as critical as growing the top line. We're seeking a commercially aware, analytically minded FP&A Analyst who can bring structure, discipline, and insight to financial planning, reporting, and analysis. This role will take ownership of company-wide cost planning, partnering with teams across the business, and supporting strategic decision-making that drives efficient growth.
This is a foundational finance role with high visibility and broad remit — ideal for someone ambitious who wants to shape the future of a growing SaaS business.
What You'll Be Doing
Owning the Company-wide Plan
- Build and maintain the full cost side of the company's financial model — from gross margin through to net profit
- Consolidate revenue and cost into the overall company plan, ensuring alignment with strategic goals
- Lead execution of annual budgets and monthly outlooks
- Partner with business leaders to understand spending plans, hiring needs, and cost drivers
- Translate strategy into clear financial plans
Reporting, Analysis & Decision Support
- Track actuals vs. budget, surfacing risks, variances, and opportunities early
- Produce clear, actionable cost reports and insights for business leaders
- Own and refine cost efficiency metrics (e.g., cost per customer, cost per employee)
- Provide analysis to inform strategic trade-offs on operating leverage, margin improvement, and investment priorities
- Deliver high-quality board and management reporting on performance and outlook
- Build dashboards and models that democratize financial insights across the business
- Act as a thought partner to senior leaders, proactively suggesting optimizations
Systems & Data Integrity
- Partner with Financial Control to ensure data integrity across ERP, HRIS, and financial systems
- Support a clean month-end close and maintain consistent reporting structures
- Continuously improve finance processes to enable speed, accuracy, and scalability
What Success Looks Like
- Business leaders have high confidence in budgets and actuals, actively using them to guide decisions
- Cost reporting and forecasts are timely, reliable, and trusted at board and executive level
- Finance is seen as a collaborative, trusted business partner rather than a back-office function
- Key financial variances and risks are identified early, with mitigation plans in place
- Financial models are clean, scalable, transparent, and well-understood by stakeholders
Requirements
About you
- 3-5 years of experience in FP&A, commercial finance, or business management — ideally in SaaS or tech scale-up environments
- Strong academic background in finance, accounting, or a quantitative field, ideally supported by professional qualifications (ACA, ACCA, CIMA, CFA) or working toward one
- Advanced financial modelling skills, with experience building and owning complex, multi-driver models
- Comfortable working directly with data (SQL and data extraction skills a plus)
- Experience with FP&A tools and automation platforms
- Skilled at simplifying financial concepts for non-finance stakeholders
- Strong understanding of SaaS metrics (e.g., LTV/CAC, Magic Number) and cost structures (headcount planning, R&D, G&A, cloud infrastructure)
- Proactive, detail-oriented, and commercially minded — you spot issues early and focus on impact
- Passionate about efficiency and growth, leveraging AI and automation to improve processes
Bonus if you have:
- Prior experience in scale-up or high-growth SaaS businesses
- Exposure to IPO-prep or rapid scaling environments
- Hands-on experience with modern FP&A software (e.g., Mosaic, Pigment)
What Drives You
- Motivated by scaling businesses effectively and influencing strategy, not just reporting numbers
- Excited by SaaS business models and building driver-based financial plans
- Passionate about exploring AI and automation in finance, moving beyond spreadsheets
- Curious about operations, product, and strategy, and eager to broaden your scope beyond "just finance."
- Ambitious to grow into a commercial leader with wide business impact
Who You Are As a Person
- Energetic, dependable, and collaborative — known as an "unblocker" who gets things done
- Analytical yet commercially aware — able to deep-dive into detail without losing sight of business impact
- Curious and adaptable, always seeking smarter, more efficient ways of working
- Enjoy experimenting with new tools and approaches, particularly in AI and automation
- Thrive in autonomy but also value brainstorming, feedback, and open collaboration
- Communicate clearly and simply, empowering others to understand and act on financial insight
Benefits
Why join us?
- We foster an inclusive and high-performance culture with a focus on work-life balance
- We believe in rewarding people generously and offer a competitive salary based on individual skills and contribution
- We host regular team events and have fantastic summer and winter parties
- You'll be part of a humble, supportive, and fun team that values collaboration, humour, and a strong sense of belonging
- We offer share options, 8% employer pension contribution, life assurance, income protection, private medical insurance, and 25 days holiday (plus public holidays)
- Our working hours are flexible, with core hours from 9am to 4pm
- We work best when we are together on site
