About Numeral Numeral is a payment technology provider that enables fintechs, payment services providers, and banks to launch new products, expand geographically, comply with payment regulations, and scale their operations with Numeral's cloud-native, API-first payments platform.
We develop and run direct integrations with a network of 30+ partner banks (including BNP Paribas, Barclays, Citi, HSBC, Banking Circle, LHV…) that can all be accessed through a single API, webhooks, and dashboard.
Customers include leading and up-and-coming fintechs like Spendesk, Swile, Alma, WorldFirst, Argentex, Deblock, and 20+ others.
We have processed more than 4m payments since our first payment in 2023 and will process more than 10m payments over the next 12 months.
Founded in July 2021, Numeral has been acquired by leading core banking system provider Mambu in December 2024.
Mambu's composable core banking system complements Numeral's API-first payments platform perfectly.
Together, we are poised for hyper-growth, serving both Mambu and non-Mambu customers globally, challenging industry giants like FIS, Bottomline, and Volante, and delivering an even greater impact across our ecosystem.
This acquisition marks an exciting new chapter for Numeral.
To support this growth, we are hiring across teams to scale our organisation and continue delivering exceptional customer value.
Learn more about Numeral and Mambu:
• Numeral • Mambu • Numeral joins forces with Mambu Our technology stack Our technology stack is built on a robust microservices architecture, leveraging domain-driven design (DDD) principles and an hexagonal approach to ensure flexibility, scalability, and clear separation of concerns.
We prioritize simplicity, maintainability, and adherence to industry best practices, with test-driven development (TDD) at the core of our engineering philosophy.
Our development process is deeply rooted in lean and agile methodologies, fostering a culture of continuous improvement and problem-solving.
We embrace an iterative approach, delivering incremental value through frequent releases and short feedback loops.
Backend • Programming language: Golang
• Messaging: Kafka (AWS MSK)
• Databases: AWS DynamoDB, AWS Aurora PostgreSQL, and AWS RDS
• Caching and In-Memory Data Store: AWS MemoryDB (Redis)
• Search and Analytics Platform: AWS OpenSearch
• Serverless Computing: AWS Lambda
Infrastructure • Cloud provider: AWS Cloud
• Orchestration: Kubernetes (AWS EKS)
• Infrastructure as code: Terraform
• Monitoring and logging: CloudWatch, Prometheus, Grafana, Datadog…
• CI / CD: GitLab
Frontend • Programming Language: TypeScript
• Framework: ReactJS
• UI library: Chakra UI
The role We are hiring a Security Engineer to join our product and engineering organisation of 20+ people, with 15 more people joining in 2025.
Responsibilities Assist in implementing and maintaining security compliance frameworks, including ISO 27001 and SOC 2Support the preparation and response to security questionnaires from prospects, customers, and partnersCollaborate with senior security engineers to identify and document risks, gaps, and improvements in existing security controlsContribute to the development and maintenance of security policies, procedures, and documentationLearn and apply fundamental concepts of information security, including risk management, access control, and network securityParticipate in security awareness initiatives and help educate teams on compliance requirementsShadow senior engineers to gain hands-on experience with security tools and practicesStay up to date on emerging threats and trends in cybersecurity and complianceYour profile Academic background in information security or a related field (e.g., computer science, cybersecurity, or information systems)Basic understanding of information security principles, such as confidentiality, integrity, and availabilityEagerness to learn and adapt to new challenges in security and compliance.Strong communication skills, with the ability to articulate technical concepts to non-technical stakeholdersDetail-oriented mindset, particularly in documentation and process adherenceA proactive and collaborative attitude, ready to take ownership of tasks and seek guidance when neededNice to have: familiarity with security standards and frameworks like ISO 27001, SOC 2, or NISTNice to have: exposure to cloud environments like AWS, Microsoft Azure, or GCPNice to have: basic knowledge of security tools such as vulnerability scanners, SIEMs, or endpoint protection platformsNice to have: interest in building a career in compliance, risk management, or technical security rolesNice to have: familiarity with CI / CD pipelines and basic coding / scripting experienceCompensation and benefits Attractive compensation plan including stock optionsRemote-first: work anywhere in Europe and come at your convenience to any Numeral / Mambu officeInternational team with 6+ different countries and frequent off-sitesSustainable mobility package and lunch vouchersChoose the best tools and equipmentOur values Make our customers win – What drives us is what we enable for our customers.
We go all out to allow them to embed payments powering new products, features, and user experiences.
We put our customers first.
Our mission is to solve their problems, one at a time.
We empower them with the best products.
We unlock innovation and businessNo shortcuts – We take great care in what we do so our customers can rely on us.
This means taking ownership of problems and solutions, paying attention to details, seeking constant improvement, and never opting for the easy way outEmbrace feedback – We use humility to stay at the cutting edge.
We seek and give honest feedback, we are excited about learning, and we inspire each other to growThink big – We want to have an impact by pushing the limits and tackling complex problems.
We don't give up until we reach success and look forward to our next challengeEnjoy the journey together – Entrepreneurship is a journey that is best enjoyed as a team.
We enjoy working and spending time together, we inspire each other to achieve great things, and celebrate as a team when they happenHiring process Screening call with Numeral / Mambu TAMInterview #1Interview #2Technical test2 reference calls
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