Senior Software Engineer

SUMMARY:
We are seeking a Senior Software Engineer with a strong background in electronic payments to join our fast-growing FinTech team in Edinburgh. You will be a key contributor in building scalable, secure, and high-performance payment systems that power transactions for millions of users daily.
This is an exciting opportunity to work on mission-critical systems in a highly regulated environment while leading the charge on innovation, design, and delivery.

POSITION INFO:

Key Responsibilities:

• Design, develop, and maintain payment processing services, APIs, and integrations.
• Lead the development of new features, enhancements, and system optimisations within the e-payment domain.
• Collaborate with product managers, architects, and QA engineers to ensure smooth delivery of solutions.
• Drive engineering best practices, including code reviews, unit testing, CI/CD, and DevOps principles.
• Ensure all solutions are compliant with PCI DSS and other relevant financial regulations.
• Mentor junior engineers and contribute to the technical roadmap.

Requirements:

• Proven experience (5+ years) as a software engineer, with at least 2+ years working on e-payment systems or FinTech platforms and Banking Industries.
• Strong programming skills in Java, Kotlin, or C# (we also welcome Python or Go experience).
• Solid understanding of payment gateways, card networks (Visa, Mastercard, etc.), 3D Secure, and tokenization.
• Experience with RESTful APIs, microservices architecture, and event-driven systems (e.g., Kafka).
• Familiarity with PCI DSS, PSD2, Strong Customer Authentication (SCA).
• Strong database skills – both relational (e.g., PostgreSQL) and NoSQL.
• Comfortable with cloud platforms – ideally AWS, but Azure/GCP also welcome.

• Experience with real-time transaction monitoring and fraud detection systems.
• Exposure to ISO 8583, SWIFT, SEPA, or open banking protocols.
• Prior experience with containerization (Docker, Kubernetes) and Infrastructure as Code (Terraform, CloudFormation).