About the role

Senior Software Engineer developing payment gateway solutions for secure transaction processing. Joining the Core Gateway team to enhance performance, reliability, and security in payment systems.

Responsibilities

Design and deliver complex backend systems that power secure, scalable, and high-performance payment processing.
Take ownership of significant components or services within the Core Gateway platform, ensuring long-term maintainability and operational excellence.
Clearly articulate complex technical solutions and trade-offs to engineers, Product, and stakeholders.
Guide project delivery within the team, helping break down work, manage technical risk, and ensure high-quality outcomes.
Proactively identify and resolve architectural gaps, performance bottlenecks, and reliability risks.
Lead and participate in design reviews, raising the quality bar across the team.
Drive improvements in observability, fault tolerance, and operational readiness across services.
Mentor junior and mid-level engineers, providing constructive feedback and supporting their technical growth.
Contribute to the evolution of CI/CD pipelines, testing strategies, and deployment automation.
Ensure adherence to strong security and compliance standards (e.g., PCI, OWASP, SOC2).
Participate in the team’s out-of-hours on-call rota, contributing to incident response, root cause analysis, and preventative improvements (typically after a 6-month onboarding period, with additional compensation provided).

Bachelor's degree in Computer Science, Information Technology, or equivalent experience.
Minimum of 5 years of experience developing complex software applications in a commercial environment.
Advanced proficiency in C# (preferred) or PHP, with strong understanding of object-oriented design principles.
Deep understanding of the full software development lifecycle (SDLC) and agile methodologies.
Experience with relational databases (e.g., MySQL, SQL Server, Oracle).
Strong knowledge of security best practices (e.g. OWASP, PCI, SOC2, HIPAA).
Proficiency with Google Cloud Platform (GCP), Amazon Web Services (AWS), or similar cloud environments.
Experience with logging systems (such as Logz.io) and optimizing logs preferred.
Experience with monitoring and alerting systems (e.g. DataDog, NewRelic, etc.) preferred.
Experience designing and building scalable, performant, and reliable systems, and improving reliability in existing systems.
Deep knowledge of design patterns and their practical application.
Proven ability to work independently while also fostering teamwork and cross-team collaboration.
Proven ability to mentor others and contribute to a strong team culture.
Strong problem-solving skills, with the ability to anticipate potential issues and proactively address them.
Excellent communication skills, capable of explaining complex technical concepts to both technical and non-technical stakeholders.