Senior .NET Developer

Ocho People; Belfast; On-site; GBP 55,000 - 65,000; Full time

Job summary

A leading company is seeking a Senior Software Engineer to join their high-performing engineering team in Belfast. This full-time, permanent position involves designing scalable software systems, mentoring junior engineers, and working with modern cloud platforms. The role offers a collaborative Agile environment and requires deep expertise in .NET Core, API development, and cloud services.

Qualifications

• Deep expertise in .NET Core and modern .NET Frameworks using C#.
• Strong background in developing APIs (REST or GraphQL).
• Hands-on experience with cloud infrastructure and services (e.g., AWS or Azure).

Responsibilities

• Collaborate to design scalable software systems.
• Own technical delivery from design through deployment.
• Mentor and support other engineers.

Skills

.NET Core

C#

API development

Cloud infrastructure

Relational databases

Automated testing frameworks

Job description

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Job Title: Senior Software Engineer
Location: Belfast (3 days a week in office)
Salary: £55,000-£65,000 depending on experience
Type: Full-time, Permanent

Overview:
We're hiring for a Senior Software Engineer to join a high-performing engineering team delivering complex software solutions across a large-scale technology estate. This is a hands-on role within a collaborative Agile environment, where you'll help shape the architecture, support junior team members, and drive best practices in engineering and delivery.

You'll be working across distributed systems, modern cloud platforms, and scalable backend services that underpin a critical internal and external user base.

Responsibilities:

Collaborate with architecture leads and senior stakeholders to design robust, scalable software systems

Own technical delivery from design through deployment and support

Mentor and support other engineers, sharing knowledge and leading by example

Contribute to continuous improvement efforts across tooling, process, and delivery pipelines

Raise risks or blockers early to maintain momentum across the engineering cycle

Deep expertise in .NET Core and modern .NET Frameworks using C#

Strong background in developing APIs (REST or GraphQL)

Solid understanding of relational databases and performance optimisation (e.g. MSSQL, MySQL)

Hands-on experience with cloud infrastructure and services (e.g. AWS or Azure)

Familiar with the entire SDLC, from requirement definition through to production support

Pragmatic mindset with the ability to challenge approaches and deliver solutions efficiently

Experience with scalable automated testing frameworks for complex systems

Nice to Have:

Background in high-throughput or real-time systems

Exposure to microservices and serverless architecture

Experience applying TDD, BDD, or related testing methodologies

Apply here or reach out to Aaron Somers at Ocho for more information via LinkedIn.