Senior .NET Developer

Overview

Cpl Recruitment are partnering with a rapidly expanding international technology organisation operating within the digital payments and subscription space. This company delivers high-volume, business-critical platforms to a global customer base and continues to invest heavily in its engineering function.

They are seeking a Senior Back-End Engineer to join their Dublin-based team, contributing to the design and evolution of scalable, high-performance systems that support large-scale transaction processing and data-intensive workloads.

The Opportunity

This role offers the chance to work on complex, distributed systems in a modern cloud environment. You will be involved in building and enhancing core backend services, optimising performance, and ensuring platform reliability at scale.

The position is well-suited to an engineer who enjoys solving technical challenges related to throughput, concurrency, and large datasets, while working in a collaborative and forward-thinking engineering culture.

Key Responsibilities

Backend Engineering & APIs

• Design and develop scalable backend services using modern frameworks and best practices
• Build and enhance high-performance API layers supporting global platforms
• Contribute to system architecture with a focus on resilience and scalability

Cloud & Data Engineering

• Work within a cloud-native environment, contributing to containerised service deployment
• Design and optimise data models and queries for large-scale, distributed databases
• Support analytics and data processing initiatives where required

Performance, Security & Quality

• Implement performance improvements and caching strategies to optimise system efficiency
• Collaborate with infrastructure teams on secure and reliable system integrations
• Maintain high coding standards through testing, peer reviews, and documentation

Collaboration & Delivery

• Engage in Agile ceremonies including sprint planning and technical discussions
• Work closely with cross-functional teams to deliver business-critical solutions
• Contribute to a culture of continuous improvement and knowledge sharing

Essential

Experience & Skills

• 5+ years’ experience in backend software development
• Strong expertise in C# / .NET or similar backend technologies
• Solid understanding of API design and distributed systems
• Experience working with relational databases and optimising SQL performance
• Familiarity with version control systems and collaborative development workflows
• Understanding of software design principles and building resilient applications

Desirable

• Exposure to cloud platforms (e.g. GCP, AWS, or Azure)
• Experience with containerisation and modern deployment practices
• Knowledge of caching, messaging, or high-throughput systems
• Background in financial services, payments, or subscription-based platforms
• Experience working in Agile delivery environments

What’s On Offer

• Opportunity to work on large-scale, high-impact systems
• Modern hybrid working model based in Dublin
• Collaborative and technically strong engineering team
• Competitive salary and comprehensive benefits package
• Ongoing professional development and learning opportunities

Eligibility

• Candidates must be based in Ireland or able to commute to Dublin, and hold valid working rights (EU/Irish citizenship or appropriate visa/permit).

If you are interested in the above role, please click apply or email your CV to [email protected]