Quantitative Software Engineer at Blockchain.com | London

Unlock Your Potential with Trust.For decades, the payment clearing process has remained stagnant. At ClearBank, we challenge the norm. We strive to revolutionize banking infrastructure to be faster, safer, more reliable, and accessible to all. Here, you can think innovatively and responsibly to discover optimal solutions.When you operate in a realm of inherent trust, it fosters safety. This safety empowers you to be courageous, to question conventions, to learn from failures, and to explore new possibilities. At ClearBank, trust is at the core of our operations. We are not merely expected to earn it; we are entrusted with it. This means addressing issues promptly, discerning good risks, and understanding that the ability to act does not always equate to the necessity to do so.Your Role Awaits You:Joining our Financial Crimes Operations Models Management team as a Blockchain & Fraud Models Analyst means taking ownership of developing and maintaining monitoring controls for blockchain-based products and analyzing fraudulent payment activities. Reporting to the Senior Manager of Models Management, you will play a key role in safeguarding our financial ecosystem.Key Responsibilities:Design and optimize robust rules and models for monitoring blockchain transactions and screening for fraudulent payments, ensuring comprehensive risk coverage and operational efficiency to support our products and clientele.Analyze blockchain and payment transaction behaviors to identify emerging typologies of financial crime, such as cross-chain activities, high-risk wallet exposures, and transaction velocity risks.Collaborate with data scientists, engineers, and compliance teams to enhance monitoring performance through improved rule logic, thresholds, and outputs.Oversee the effectiveness of monitoring rules and models, maintaining rule health metrics, dashboards, and performance reports.Conduct root cause analyses of monitoring incidents and model performance issues, recommending and implementing data-driven enhancements.Engage with the 1st and 2nd Line of Defence teams, as well as external vendors, to ensure monitoring controls are well-calibrated, documented, and aligned with risk appetites.Contribute to strategic initiatives aimed at enhancing the organization's financial crime strategies.

Blockchain.com is at the forefront of revolutionizing the financial landscape. As a leading global cryptocurrency platform, we empower millions to securely engage with digital assets. Since our launch in 2011, we have garnered the trust of over 90 million wallet holders and facilitated more than $1 trillion in crypto transactions.Blockchain.com is the premier software platform for digital assets, providing the world's most extensive production blockchain platform. Our mission is to drive innovation, foster creativity, and build a transparent and equitable financial future through cutting-edge software development.We are seeking talented software engineers from diverse technical backgrounds with a solid history of designing scalable, reliable, and high-performance systems. In this pivotal role as a Senior Back-End Engineer, you will lead technical discussions, influence strategic decisions, and contribute to the team's growth by championing exemplary engineering practices.

At Trustpilot, we are on an exciting journey as a profitable, high-growth FTSE-250 company with a bold vision: to be the universal symbol of trust. We operate the largest independent consumer review platform globally, and while we've achieved significant milestones, there's much more exhilarating work ahead. Join us at the forefront of trust!We are in search of an inquisitive and analytical Fraud Detection Analyst to become part of our global Fraud & Investigations team. In this role, you will analyze data, identify trends, and formulate detection rules that play a crucial role in preventing fraud, thereby protecting consumers, businesses, and the integrity of our platform.You'll tackle complex and often ambiguous challenges in the dynamic landscape of online trust. If you are passionate about problem-solving, delving into data, and making a significant impact, this is your opportunity.Joining a collaborative and inquisitive team that values transparency, fairness, and humor, you will contribute to the broader Trust & Transparency team, driving change across the organization and helping us achieve our vision of being the online symbol of trust.Key Responsibilities:Analyze fraud patterns and develop a comprehensive understanding of fraudulent behavior on our platform using SQL, Google BigQuery, and Google Looker.Create rules based on your analysis to mitigate fraudulent activities across our platform.Investigate escalated cases related to potential misuse of our platform and support media, legal, and customer inquiries.Collaborate with data science experts to enhance our technological and procedural methods for identifying fraud.Work closely with engineering teams to improve internal tools and databases that bolster our fraud prevention efforts.Serve as a key resource for other departments by analyzing customer and reviewer behavior on the platform.Communicate findings from analyses and investigations to various stakeholders across the department and the wider company.Report directly to our Lead Fraud & Investigation Analyst.

Blockchain.com is at the forefront of revolutionizing finance, providing millions globally with secure access to cryptocurrency. Established in 2011, we have gained the trust of over 90 million wallet holders and more than 40 million verified users, facilitating over $1 trillion in crypto transactions.Blockchain is the world's premier software platform for digital assets. We operate the largest production blockchain platform globally, driven by our passion for coding and building an open, accessible, and equitable financial future, one innovative software solution at a time.We are seeking a Site Reliability Engineer to join our Core team. This role involves advocating for infrastructure best practices across our organization, enabling us to securely scale a distributed financial platform that serves millions daily.Our distributed financial platform addresses some of the most fascinating challenges in the crypto space for our vast customer base and is experiencing rapid growth. The Site Reliability Engineering (SRE) team at Blockchain merges software and systems engineering to create a platform that simplifies complexity, enhancing security, reliability, and swift product delivery.The SRE organization at Blockchain is a dynamic environment focused on continual improvement. We foster a culture where team members can propose, discuss, design, and implement changes with a high degree of autonomy. We value abstract thinking to develop exceptionally effective tools and strive to eliminate toil.As a member of the Core team, you will gain a comprehensive understanding of our products' infrastructure needs. Your role will include establishing and maintaining innovative engineering solutions to enhance our customers' experience through the development of essential tools. Importantly, you will also mentor and guide developer teams to deliver new features in a rapid, secure, and scalable manner.

Join our dynamic team at Duffel as a Fraud Analyst in London, where you will play a crucial role in identifying and preventing fraudulent activities. Your keen analytical skills will be essential in assessing risks and implementing effective strategies to safeguard our operations. If you are passionate about leveraging technology and data analysis to combat fraud, we want to hear from you!

Blockchain.com is at the forefront of the future of finance, connecting individuals globally to the world of cryptocurrency. As the most trusted and rapidly expanding global crypto platform, we empower millions to securely access crypto assets. Since our inception in 2011, we have gained the confidence of over 90 million wallet holders and more than 40 million verified users, facilitating over $1 trillion in cryptocurrency transactions.As the leading software platform for digital assets, Blockchain.com fuels the largest production blockchain platform worldwide. Our mission is to innovate, code, and construct an inclusive and fair financial ecosystem, one line of code at a time.As we expand our platform to cater to millions daily, we are looking for a Cyber Security Analyst to become a vital part of our dedicated security team.At Blockchain.com, security transcends mere policies; it embodies our core philosophy. In a continuously evolving crypto landscape, you will confront some of the most intricate challenges related to securing a decentralized financial platform. The Security team plays a pivotal role in shaping and implementing secure systems throughout the organization. Employing a wide array of tools and methodologies, we proactively identify and mitigate security risks to safeguard our users, stakeholders, and systems.

Role overview Funding Circle seeks a Lead Model Validation Analyst in London. This role centers on upholding the integrity and accuracy of financial models that inform business decisions and manage risk. The analyst will play a central part in ensuring models meet high standards and support the company’s goals. What you will do Develop and enhance methodologies for validating financial models. Carry out thorough reviews to evaluate model performance and dependability. Collaborate with various teams to improve analytical processes across the business. Contribute to shaping the model risk management framework to promote transparency and uphold high standards. Impact This position is vital to Funding Circle’s commitment to strong model governance and analytical quality. The analyst’s work supports clear, informed decision-making and reinforces transparency throughout the company.

Join Wise as a Senior Fraud Product Analyst and play a pivotal role in safeguarding our customers while driving innovation in fraud prevention. You will leverage your analytical skills and product expertise to enhance our fraud detection capabilities, working closely with cross-functional teams to implement effective solutions.

Join us as a Fraud Analyst in London, where we are revolutionizing the travel industry.Are you passionate about data analysis and fraud prevention? At Duffel, we are committed to simplifying travel by enhancing payment systems and ensuring secure transactions for over 4 billion airline passengers.As a part of our dynamic London team, you will play a crucial role in identifying fraudulent activities, formulating detection rules, and collaborating with our engineering and data science teams.If you thrive on solving complex challenges and making a significant impact, this is your opportunity to contribute to the future of travel!

At Zopa, we're on a mission to reshape the financial landscape, and we need a Senior Fraud Analyst to join our dynamic Fraud Analytics team. In this pivotal role, you will leverage your analytical expertise and keen judgment to combat fraud, ensuring the safety of our customers and our business. You will independently conduct in-depth fraud analyses, support incident responses, and serve as a senior analytical resource within our team. Your contributions will directly influence real-time and strategic decision-making processes, propelling Zopa forward in our commitment to innovation in finance.

About Ki Insurance Ki Insurance operates at the intersection of technology and insurance, covering everything from space missions to major sporting events. The company partners with organizations such as Google and UCL to build a digital platform that uses algorithms, machine learning, and large language models to generate insurance quotes in seconds. As the largest global algorithmic insurance carrier and the fastest-growing syndicate in the Lloyd's of London market, Ki achieved $100 million in profit within its first three years. Teams work collaboratively, using agile methods to improve the customer experience and drive innovation in a centuries-old industry. Role Overview: Catastrophe Modelling Analyst The Catastrophe Modelling Analyst joins the Risk Aggregation team, supporting underwriters with timely, consistent, and accurate services that align with risk aggregation strategies. This role ensures the business maintains a clear understanding of its risk profile by delivering complete exposure data and modeled loss information. Main Responsibilities Produce accurate pricing, analytics, management information, and reports for stakeholders, including underwriting and ORI placement teams, within set deadlines. Monitor and maintain the quality of exposure data and outputs from Ki’s processing teams. Offer expertise and insights for broader risk aggregation initiatives and deliverables. Develop and sustain strong working relationships with internal and external stakeholders, such as model vendors and brokers. Provide support to colleagues within the Risk Aggregation team as required. Work with other teams to strengthen product development and expand Ki’s risk perspective across different business classes and offerings. Help identify and deliver new revenue opportunities. Location London, England, United Kingdom

Join Monzo as a Senior Forecasting Modeller, where you will leverage advanced analytics to shape our financial forecasts. Your expertise will guide decision-making processes and enable us to enhance our strategic planning. You will collaborate closely with cross-functional teams to develop robust predictive models that drive business growth and improve operational efficiency.

Join Monzo as an IFRS9 Modeller and play a crucial role in shaping our financial strategies. You will be responsible for developing and maintaining IFRS9 models, ensuring accurate credit risk assessments and supporting our growth in the banking sector.

Fraud Manager - GermanyHybrid in LondonAbout UsAt iwoca, we're creating an ecosystem where small businesses can flourish. We believe that small enterprises are not mere statistics – they are vital components of our communities, the essence of our high streets, and the driving force of our economy. Since our inception in 2012, we have transformed the way these businesses access financing, streamlining a previously cumbersome and frustrating process into a seamless journey: fast, flexible funding that caters to the needs of modern businesses.Our achievements are evident: we've disbursed billions in funding to over 150,000 businesses throughout Europe, solidifying our position as one of the continent's foremost fintech trailblazers. But our journey is only beginning. Our goal? To empower one million businesses with the financial tools they truly deserve.The TeamThe DE Compliance team is an independent group of experts committed to ensuring iwoca remains a secure and reliable partner for German SMEs. This team operates at the crossroads of technology and risk management, working in close collaboration with Tech, Operations, and Risk Management to develop robust fraud detection systems. In an agile environment, the team regularly convenes to share insights on emerging fraud trends and collaborates on cross-functional projects to proactively address evolving threats.Role OverviewAs a Fraud Manager, you will play a pivotal role in shaping the security and integrity of our digital lending products. You will have the autonomy to identify emerging risks and the influence to implement both technical and strategic solutions to mitigate them.Your Impact:Identify and assess emerging fraud scenarios, including impersonation, social engineering, and account takeovers (ATO).Develop and adjust the fraud strategy tailored for the German digital lending market, ensuring an optimal balance between risk management and conversion rates.Design effective verification processes that safeguard the business while minimizing friction for our customers.Innovation & Collaboration:Collaborate with Tech and Data teams to deploy automated detection mechanisms, leveraging machine learning models and rule-based systems.Lead the selection and implementation of innovative technologies to enhance the fraud prevention toolkit.Create and conduct training programs to elevate fraud awareness across the organization and with our external partners.

About ZegoZego is revolutionizing the motor insurance industry by empowering responsible drivers. Since our inception in 2016, we have made it our mission to simplify and lower the cost of insurance for good drivers. Our diverse clientele ranges from van drivers and gig workers to everyday motorists, all of whom are at the core of our operations. With tens of millions of policies sold and over $200 million raised in funding, our accolades include the prestigious Insurance Claims Team Of The Year 2024 from The Insurance Post's Claims & Fraud Awards. And we’re just getting started.Your RoleWe are seeking a dynamic and detail-oriented Fraud Claims Handler to enhance our Counter-Fraud team. In this pivotal position, you will analyze intricate claims networks, tackling organized fraud rings and professional enablers. Your aim will be to thwart fraudulent activities that threaten our financial stability, ensuring that Zego remains a deterrent to fraudsters while safeguarding our legitimate customers.Utilizing cutting-edge technologies, industry-standard tools, and reliable data sources, you will make informed decisions that protect both our clients and the company.Key ResponsibilitiesManagement of Organized Fraud & Complex CasesOversee a portfolio of complex organized fraud motor claims, particularly focusing on multi-vehicle incidents, staged accidents, and 'slam-on' claims.Conduct thorough investigations into Personal Injury claims, scrutinizing causation and identifying any fictitious occupants or pre-existing conditions.Challenge Credit Hire claims effectively, assessing necessity, duration, and rates, with a focus on organized fraud networks.Formulate and implement strategies for cases involving professional enablers.Map connections between claims to identify cross-claims fraud syndicates.Promote commercial sustainability by identifying and mitigating high-value indemnity losses from organized fraud, ensuring cost savings contribute directly to Zego's competitive pricing.Qualifications for SuccessFraud & Technical ExpertiseA proven background in managing organized fraud, injury, and credit hire claims, with a history of dismantling fraud networks.Strong commercial insight, balancing thorough fraud investigations with customer experience considerations.Understanding the importance of effective fraud detection in protecting both the firm and its clientele.

About Us At Ki Insurance, we’re in the business of insuring some of the most exciting ventures around the globe—from space shuttles and world tours to wind farms and even professional footballers’ legs.Our mission is clear: to digitally disrupt and revolutionize an industry that has remained unchanged for over 335 years. Partnering with Google and UCL, we have developed an innovative platform that leverages algorithms, machine learning, and large language models to deliver rapid insurance quotes—within seconds instead of days.As the world’s largest algorithmic insurance carrier, we are proud to be the fastest-growing syndicate in the Lloyd's of London market, achieving an unprecedented $100 million in profit within just three years.Our diverse teams work collaboratively in an agile environment, striving to provide the best possible experience for our customers. As we set our sights on ambitious future goals, we are eager to welcome brilliant minds who are ready to challenge the status quo and explore new horizons with us.Your RoleWe are seeking a Senior Analyst to join our team at Ki Insurance. In this pivotal role, you will ensure that our underwriters receive prompt, consistent, and precise service aligned with the risk aggregation strategy established with the Senior Manager (Catastrophe Modelling) and Head of Risk Aggregation.With your expertise in providing comprehensive and accurate exposure data and modelled loss information, you will facilitate timely reporting for both internal and external stakeholders, ensuring compliance with internal guidelines and regulatory standards.Your role will involve enhancing business understanding of its risk profile, enabling effective aggregate deployment, and continuously seeking opportunities to develop, streamline, and implement best practices for the risk aggregation function, while ensuring alignment across various business classes and modelling applications (e.g., ORI and Pricing). Additionally, you will oversee the daily operations, relationships, and outputs of our outsourced business partner related to relevant modelling and data entry.Key Responsibilities Collaborate with the Risk Aggregation team and relevant functions (capital modelling, actuarial, and ERM) to ensure that modelling processes and assumptions are closely aligned and meet regulatory standards.Deliver accurate pricing, analytics, management information, and reporting to stakeholders (including underwriting and ORI placement teams) in a timely manner.Oversee the quality of exposure data and the data production from Ki's processing teams.Provide subject matter expertise for broader risk aggregation projects and deliverables (e.g., Ki's risk perspective and ORI).

Blockchain.com is revolutionizing the future of finance by connecting individuals to the world of cryptocurrency. As a leading global crypto company, we empower millions to securely access and utilize cryptocurrency. Since 2011, Blockchain.com has garnered the trust of over 90 million wallet holders and more than 40 million verified users, facilitating over $1 trillion in crypto transactions.Our Summer Internship Program offers students a unique opportunity to gain hands-on experience in the crypto industry, working on impactful projects alongside seasoned professionals in a dynamic, global technology environment.We are seeking a driven HR Summer Intern to join our People team for a 12-week internship from June to September 2026.This position is perfect for students passionate about employee culture, communication, and the role of internal messaging in enhancing the employee experience within a global organization.

Blockchain.com is at the forefront of revolutionizing the financial landscape. As the world’s most trusted and rapidly expanding crypto platform, we empower millions globally to access cryptocurrency securely. Since our launch in 2011, Blockchain.com has built a strong foundation of trust with over 90 million wallet holders and more than 40 million verified users, facilitating transactions exceeding $1 trillion in cryptocurrency.We are in search of a dynamic Brand Design Lead to craft and enhance the visual identity and creative vision of one of the leading cryptocurrency platforms globally. This crucial role will shape how our brand is recognized across various touchpoints—digital, physical, and beyond. You will blend strategic insight with hands-on creativity, ensuring our brand is innovative, cohesive, and resonates with our mission to transform finance.

About Blockchain.com Blockchain.com connects people to the world of cryptocurrency. Since 2011, the company has supported over 90 million wallet holders and more than 40 million verified users, processing more than $1 trillion in transactions. Role Overview The Institutional team at Blockchain.com is looking for a Front-End Engineer based in London. This group focuses on building tools and experiences for institutional clients in the crypto space. What You Will Do Collaborate with colleagues to deliver front-end solutions for institutional products Contribute to a culture that values courage, productivity, and continuous improvement Work to optimize processes and deliver results that matter Grow your skills by learning from others and sharing knowledge What We Look For Strong interest in front-end engineering and digital assets Team player who values collaboration and learning Commitment to high standards and impactful work Based in London or willing to work from the London office