Senior .NET Developer

Ocho People; Belfast City District; Hybrid; GBP 39,000 - 65,000; Full time

Job summary

Ocho People is recruiting a Senior Software Engineer for a world leading technology organisation operating across 27 countries. The role focuses on .NET/C# development, distributed cloud native systems, and API design with REST and GraphQL.

You will influence technical direction, mentor engineers, and deliver scalable solutions in a hybrid Belfast-based environment. This is a high-impact, hands-on engineering position at scale.

Qualifications

• Proven experience designing, developing and maintaining distributed, event driven, cloud native systems.
• Expertise in modern .NET technologies (.NET Framework and .NET Core) using C#.
• Strong experience in API design across REST and GraphQL.
• Relational database design and optimisation (MSSQL/MySQL).
• Hands on cloud experience with AWS or Azure.
• Full SDLC involvement across design, development, QA and post release support.

Responsibilities

• Collaborate with Solution Architects to design and implement solutions aligned with IT strategy and technical vision.
• Take ownership of engineering deliverables, ensuring quality and scalability.
• Design and develop distributed, event driven, cloud native systems across the full SDLC.
• Build and maintain REST and GraphQL APIs to a high standard.
• Drive continuous improvement by exploring new technologies and methodologies.
• Mentor and support team members, fostering learning and technical excellence.
• Communicate progress and raise impediments to minimise delivery risks.
• Build automated testing solutions for complex systems.

Skills

Distributed systems

NET/C#

REST/GraphQL APIs

Cloud platforms (AWS/Azure)

SQL (MSSQL/MySQL)

SDLC

Mentorship

Automated testing

Tools

WPF

AWS serverless

Java

JavaScript/React

TDD/BDD

Job description

Senior Software Engineer (.NET / C#)

Ocho People | Technology Recruitment

• Senior Software Engineer role at a world leading technology organisation operating across 27 countries
• .NET and C# focused with distributed systems, cloud native architecture, REST and GraphQL APIs
• Influence technical direction, mentor others and deliver solutions that operate at genuine scale
• Hybrid working, Belfast based
• Salary up to £65,000

About the Company

Our client is a world leading technology organisation operating at significant global scale – 60 offices, 27 countries, over 5,200 people. Their engineering teams build and maintain business critical systems that process enormous volumes of data and transactions daily, and they take the quality of that engineering seriously. Self organising, cross functional Agile teams, a genuine focus on cloud native architecture and automation, and a culture built around continuous improvement and knowledge sharing. This is not a company where engineers are told what to build and left to get on with it – they are involved in shaping technical direction from day one.

Why Work Here?

This is a company that is genuinely investing in Belfast. They have hired 12 engineers here already this year – not as a cost saving exercise, but because they are building serious engineering capability in Northern Ireland for the long term. The Belfast team is not a satellite office doing maintenance work. It is a core part of a global engineering organisation tackling complex, large scale problems with modern technology and real autonomy.

If you are a senior engineer who wants to work somewhere that takes engineering seriously, gives you the scope to influence how things are built, and surrounds you with people who care about the craft, this is worth exploring. The problems are hard, the systems are real, and the opportunity to grow is genuine.

Key Responsibilities

• Collaborate with Solution Architects and Principal Engineers to design and implement solutions aligned with IT strategy and technical vision
• Take ownership of engineering deliverables, ensuring quality, scalability and adherence to best practices
• Design and develop distributed, event driven, cloud native systems across the full software development lifecycle
• Build and maintain REST and GraphQL APIs to a high standard
• Drive continuous improvement by exploring new technologies, tools and methodologies
• Mentor and support team members, fostering a culture of learning and technical excellence
• Communicate progress effectively and proactively raise impediments to minimise delivery risks
• Build automated testing solutions for complex systems

What You’ll Need

Essential:

• Proven experience designing, developing and maintaining distributed, event driven, cloud native systems
• Expertise in modern .NET technologies (.NET Framework and .NET Core) using C#
• Strong experience in API design and development across REST and GraphQL
• Solid understanding of relational database design and optimisation with MSSQL or MySQL
• Hands on experience deploying and managing cloud environments on AWS or Azure
• Comprehensive knowledge of the full SDLC with proactive involvement across design, development, QA and post release support
• Strong problem solving skills and ability to validate approaches through proof of concepts
• Experience building automated testing solutions for complex systems
• Ability to balance pragmatism with innovation and deliver high quality solutions under tight deadlines

Nice to Have:

• Proficiency in WPF application development
• Experience with AWS serverless architecture and microservices
• Familiarity with Java, JavaScript or React
• Understanding of TDD, BDD or similar testing methodologies

Why Apply?

• Salary up to £65,000
• Hybrid working with a Belfast base
• Part of a rapidly growing Belfast engineering hub – 12 new hires already this year
• Work on business critical systems at genuine scale within a world leading organisation
• Real opportunity to influence technical direction and mentor engineers around you
• Self organising, cross functional Agile teams with a strong focus on automation and cloud native architecture
• Collaborative culture with a genuine emphasis on continuous improvement, experimentation and knowledge sharing
• Direct access to Solution Architects and Principal Engineers across a mature, technically serious engineering function

How to Apply

For a confidential conversation about this opportunity, please reach out to Nick Napier directly on LinkedIn or submit your CV via the link below.