Senior Backend Developer

Company Name:

The Senior Backend Developer provides technical leadership in the design and evolution of complex backend systems, with a strong focus on Domain-Driven Design (DDD) and modern architectural patterns. This role is responsible for shaping domain models aligned to business capabilities and ensuring backend solutions are scalable, maintainable, and resilient. The Senior Backend Developer also plays a key role in establishing engineering standards, mentoring developers, and driving best practices across backend services.

Major Activities:                                                                                         

Architecture & Domain Modelling

• Lead the design and implementation of robust backend architectures grounded in Domain-Driven Design principles.
• Define and evolve bounded contexts, aggregates, entities, value objects, and domain services aligned to business domains.
• Translate complex business requirements into clean, expressive domain models.
• Apply CQRS where appropriate to ensure scalability and clear separation of concerns.
• Champion Clean Architecture principles to maintain clear layering, testability, and long-term maintainability.
• Make sound technical decisions, clearly articulating trade-offs between performance, delivery speed, and operational complexity.

Backend Engineering Excellence

• Design, develop, and maintain high-performance, secure, and scalable APIs and backend services.
• Establish and promote best practices around code quality, automated testing, and resilience.
• Lead design reviews and contribute to architectural governance across services.
• Troubleshoot complex production issues and drive root cause analysis and systemic improvements.

Collaboration & Technical Leadership

• Collaborate closely with product, architecture, and frontend teams to ensure cohesive system design.
• Participate in agile ceremonies, technical planning, and estimation activities.
• Mentor and guide mid-level developers, contributing to a culture of engineering excellence.
• Clearly communicate architectural decisions and domain concepts to both technical and non-technical stakeholders.
• Contribute to continuous improvement of development standards and engineering practices.

Knowledge:                                                                                                  

The knowledge/skills required to perform this role are:

• 5+ years of backend development experience, with significant experience in complex, domain-rich systems.
• Proven experience delivering production-grade systems using DDD principles.
• Experience working in microservices or modular monolith architectures.
• Demonstrated ability to influence technical direction and improve engineering standards.
• BSc degree in Computer Science, Software Engineering, or related discipline (or equivalent experience).
• Extensive experience with .NET / C# backend development in enterprise or SaaS environments.
• Strong working knowledge of Domain-Driven Design (DDD) with hands-on implementation experience.
• Practical experience implementing CQRS patterns in production systems.
• Deep understanding of backend design patterns (dependency injection, repository, mediator, factory, etc.).
• Strong understanding of Clean Architecture and separation of concerns.
• Strong experience with PostgreSQL or other relational databases.
• Proficiency with modern ORM frameworks such as Entity Framework (or similar).
• Exposure to CosmosDB or other NoSQL/document databases.
• Experience designing database schemas aligned with domain boundaries.
• Familiarity with Docker for containerised development and deployment workflows.
• Good exposure to Azure environments and supporting infrastructure.
• Experience designing and consuming RESTful APIs.
• Understanding of distributed systems concerns such as consistency, messaging, and eventual consistency.

What we offer: 

At ISC, we believe in progress with purpose and are proudly certified as a Great Place to Work. We’re committed to creating a supportive, inclusive, and engaging environment where people can thrive. Here’s what you can expect when you join our team: 

• We believe in progress with purpose. 

• Innovative technology   

• A record of sustainable growth, 

• Investment in diversifying lines of business  

• We support your growth. 

• Career development and internal growth opportunities 

• Education support to help advance your skills 

• Opportunities to contribute to meaningful, high-impact work 

• We care about people.  

• A supportive, inclusive workplace built on trust and collaboration 

• Recognition programs that celebrate contributions and achievements 

• A hybrid work schedule that supports work–life balance 

A little more about us: 

ERS is located in Dublin, Ireland while our multinational parent company ISC (TSX:ISC) is headquartered in Regina, Saskatchewan, Canada. ISC is a leading provider of registry and information management services for public data and records. Throughout our history, we've excelled at delivering value to government, to industry and to our community. We are the partner of choice for governments and private sector organizations seeking solutions across the information management spectrum. 

Help us build the next generation of registries with your innovation and technology skills. If this opportunity interests you, please apply by 30th of September. We would like to thank all candidates for their interest, however, only those selected to continue in the recruitment process will be contacted.