London, England, United Kingdom · Hybrid
We power people’s progress. At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to kee…
Skills: SQL, Python, Fraud Analytics, Risk Analysis, Data Visualization
London, England, United Kingdom · On-site
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London, England, United Kingdom · Hybrid
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London, England, United Kingdom · Hybrid
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London, England, United Kingdom · Hybrid
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London, England, United Kingdom · Hybrid
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London, England, United Kingdom · Hybrid
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London, England, United Kingdom · Hybrid
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London, England, United Kingdom · Hybrid
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London, England, United Kingdom · Hybrid
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London, England, United Kingdom · On-site
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London, England, United Kingdom · Hybrid
The Business Selection & Transactional Conflicts team is a global function that sits within the Client Engagements & Conflicts Office within Banking. We work across our Banking & International divisions to drive superior…
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London, England, United Kingdom · Hybrid
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London, England, United Kingdom · On-site
PJT Partners is a global advisory-focused investment bank. Our team of senior professionals delivers a wide array of strategic advisory, shareholder advisory, restructuring and special situations and private fund advisor…
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London, England, United Kingdom · Hybrid
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London, England, United Kingdom · Hybrid
$106k–$142k/yr
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London, England, United Kingdom · Hybrid
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London, England, United Kingdom · On-site
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London, England, United Kingdom · On-site
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London, England, United Kingdom · On-site
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Sign up with Clera and we'll reach out the moment a role actually fits you — no more spraying applications into the void.
The role involves designing and maintaining fraud prevention rules and alerting systems to protect the marketplace. You will act as the analytical bridge between Product, Fraud Operations, and Applied AI to turn raw signals into actionable intelligence.
Requires 4+ years of experience in fraud analytics or trust and safety with strong proficiency in SQL and Python. Candidates must be able to communicate complex fraud signals to executives and have experience mentoring other analysts.
At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact.
We’ve just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. Today, 100,000+ tutors teach 90+ languages to learners in 180 countries - and we’re only getting started. As a category-defining company, we’re shaping what the future of learning looks like at global scale.
Every Preply lesson sparks change, fuels ambition, and drives progress that matters. Joining Preply means helping define the future of education at global scale, and building something that truly matters for millions of people, every day.
At Preply, data is at the heart of every decision we make. We run hundreds of A/B tests to continually optimize our product, each with its own analytical and tracking challenges. The complexity of our subscription model, along with the unique dynamics of tutor-learner interactions, offers an exciting opportunity for those looking to make a real impact.
As Senior Data Analyst – Fraud Prevention, you will be the analytical bridge between Product, Fraud Operations, and the Applied AI team. You will be the expert who turns model outputs and raw signals into actionable intelligence: rules, alerts, forecasts, and metrics that keep Preply’s marketplace safe and trustworthy.
Our Data Team is dedicated to empowering top-quality decision-making. Do you want to know how? Visit our Tech Radar to learn about the technologies we use at Preply!
Work with outputs from ML models to maintain and improve fraud prevention decision, balancing detection coverage against false positive rates
Own the fraud rule lifecycle - designing, testing, and maintaining prevention rules, with a clear view of coverage, false positive trade-offs, and when to retire what's no longer working
Partner with Fraud Operations to understand emerging abuse patterns and translate operational observations into analytical improvements.
Design and maintain alerting systems that identify threats early, giving the team time to respond before incidents escalate.
Forecast fraud losses and chargeback volumes, giving Finance and Risk leadership earlier visibility into projected exposure.
Define and own the north star metrics and KPIs for fraud prevention, ensuring reporting is clear, owned, and actionable at the executive level.
Act as the data bridge between Product and the Applied AI team - providing performance feedback that informs model updates and roadmap prioritisation.
Support the evaluation of third-party fraud prevention providers, bringing data-driven criteria to vendor assessments.
Collaborate with Data and Analytics Engineering to ensure fraud-related data is tracked, governed, and handled in line with PII requirements.
4+ years of experience in fraud analytics, risk analysis, or a closely related payments/trust & safety domain.
Strong SQL and Python proficiency being comfortable writing analytical queries across large transactional datasets, building monitoring logic, and applying statistical techniques to fraud and risk problems
Experience designing and maintaining dashboards or alerting systems with clear signal-to-noise discipline.
Strong analytical communication: able to turn ambiguous fraud signals into crisp, actionable narratives for operational and executive audiences.
Experience collaborating with cross-functional teams including Operations, Engineering, and Product.
Ability to leverage AI tools and agents as a force multiplier for analysis, while maintaining the critical thinking to interrogate outputs, spot gaps, and own the conclusions
Experience mentoring junior and mid-level analysts helping them grow their technical skills, develop analytical judgement, and raise the quality of the team's output
Prior experience working in a marketplace or two-sided platform.
Experience with payment processing concepts - chargebacks, dispute flows, authorisation rates, PSP dynamics.
Exposure to compliance or regulatory frameworks (PSD2/3, AML, KYC).
An open, collaborative, dynamic and diverse culture;
A generous monthly allowance for lessons on Preply.com, Learning & Development budget and time off for your self-development;
A competitive financial package with equity, leave allowance and health insurance;
Not in Barcelona? We offer an attractive relocation package to join us in our Preply Barcelona Hub
Access to free mental health support platforms;
Access to Gympass-partnered wellness and gym centers throughout Spain to promote and support well-being and physical health;
The opportunity to unlock the potential of learners and tutors through language learning and teaching in 175 countries (and counting!).
#LI-AG1
Care to change the world - We are passionate about our work and care deeply about its impact to be life changing.
We do it for learners - For both Preply and tutors, learners are why we do what we do. Every day we focus on empowering tutors to deliver an exceptional learning experience.
Keep perfecting - To create an outstanding customer experience, we focus on simplicity, smoothness, and enjoyment, continually perfecting it as every detail matters.
Now is the time - In a fast-paced world, it matters how quickly we act. Now is the time to make great things happen.
Disciplined execution - What makes us disciplined is the excellence in our execution. We set clear goals, focus on what matters, and utilize our resources efficiently.
Dive deep - We leverage business acumen and curiosity to investigate disparities between numbers and stories, unlocking meaningful insights to guide our decisions.
Growth mindset - We proactively seek growth opportunities and believe today's best performance becomes tomorrow's starting point. We humbly embrace feedback and learn from setbacks.
Raise the bar - We raise our performance standards continuously, alongside each new hire and promotion. We build diverse and high-performing teams that can make a real difference.
Challenge, disagree and commit - We value open and candid communication, even when we don’t fully agree. We speak our minds, challenge when necessary, and fully commit to decisions once made.
One Preply - We prioritize collaboration, inclusion, and the success of our team over personal ambitions. Together, we support and celebrate each other's progress.
Preply.com is committed to creating an inclusive environment where people of diverse backgrounds can thrive. We believe that the presence of different opinions and viewpoints is a key ingredient for our success as a multicultural Ed-Tech company. That means that Preply will consider all applications for employment without regard to race, color, religion, gender identity or expression, sexual orientation, national origin, disability, age or veteran status.
Power People’s Progress
We power people’s progress. At Preply, we’re creating life-changing learning experiences by pairing the magic of human tutors with the power of AI. We help learners discover the perfect tutor, craft a personalized learning journey, and stay motivated to keep growing – wherever they are in the world. With a global network of 100,000+ tutors teaching 90+ languages across 180 countries, Preply is shaping the future of learning. Backed by $150M in Series D funding, we’ve reached unicorn status and are scaling fast – all while staying grounded in our mission to make learning more personal, powerful, and human. Our team of 700+ Preplers brings together over 60 nationalities, working across hubs in Barcelona, London, Kyiv, New York and beyond.
Offices: 1309 Beacon Street, Suite 300, Brookline, Massachusetts 02446, US · Carrer de Badajoz, 97, 4,5,8 floors, Barcelona, Catalonia 08018, ES · 25 Sichovykh Striltsiv St., Kyiv, 04054, UA · 1 Old Street Yard, London EC1Y 8AF, London, GB
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