Job Description

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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.




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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.
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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

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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).
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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.
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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