Senior Full Stack Engineer (Greenfield Project)

Ocho People Ltd.; Belfast City District; Hybrid; GBP 55,000 - 65,000; Full time

Benefits offered by this job

Hybrid working

Excellent annual leave

Benefits package

Job summary

Ocho People Ltd. is sourcing a Senior Full Stack Engineer to join a greenfield project in Belfast, blending back-end strength with React front-end work.

You will own features end-to-end in a fast-moving, AI-assisted environment, shaping architecture and delivering robust services. The role offers hybrid flexibility (three days per week in Belfast) with a clear path toward technical leadership and ownership in a global financial markets context.

Qualifications

• Solid commercial experience as a full stack or backend-leaning engineer.
• Strong C#, .NET and ASP.NET skills, ideally with Entity Framework.
• Good relational database experience with SQL Server or PostgreSQL.
• Working React experience; you don’t need to be a front-end specialist.
• Experience building and integrating APIs (REST, GraphQL or WebSockets).
• Comfortable owning features end to end within an Agile, autonomous team.
• Curious problem-solving mindset and quick to learn new technologies.
• Able to work three days a week from Belfast.

Responsibilities

• Build new product features end to end, from design through to production.
• Shape the architecture of a greenfield product as it evolves.
• Develop robust back-end services and APIs using C#, ASP.NET and Entity Framework.
• Deliver clean, usable front-end features in React and TypeScript.
• Use AI-assisted coding tools to move faster and raise quality.
• Work directly with product owners and analysts to turn ambiguous requirements into clear solutions.
• Champion automated testing, CI/CD and good engineering practice.
• Troubleshoot and resolve issues in production.
• Mentor less experienced engineers as the team grows.

Skills

Full stack experience

C# / .NET / ASP.NET

SQL Server / PostgreSQL

React & TypeScript

APIs (REST/GraphQL/WebSockets)

Agile / autonomous team

Belfast on-site three days

AI-assisted coding tools

Tools

AWS

Docker

Kubernetes

Job description

Senior Full Stack Engineer | C# .NET | React | Greenfield Product | Belfast Hybrid

At-a-Glance

• Greenfield build.
• Backend-leaning full stack: C#, ASP.NET, Entity Framework and React
• Salary £55,000- £65,000
• Hybrid: three days a week in a Belfast office

About the Company

Our client is a global leader in financial and commodities market infrastructure, connecting traders and institutions to liquidity and data in every major financial centre. With a heritage stretching back well over a century and thousands of people worldwide, they offer the stability and scale of an established market leader. Their engineering teams build the software that brokers rely on every day to trade more efficiently across some of the world's most dynamic markets.

The Role

You'll join a small, self-directed team building a new trade ledgering and reporting product... described by the Head of Engineering as a mini start-up inside a corporate. The product is still taking shape, so you'll have real influence over what gets built and how, with end-to-end ownership of features from idea to production. The team moves quickly, embraces AI-assisted coding and is learning as it grows, so curiosity matters as much as a perfect CV. It suits a backend-leaning full stack engineer with a strong C# foundation who wants autonomy, pace and a genuine route towards technical leadership.

Key Responsibilities

• Build new product features end to end, from design through to production
• Shape the architecture of a greenfield product as it evolves
• Develop robust back-end services and APIs using C#, ASP.NET and Entity Framework
• Deliver clean, usable front-end features in React and TypeScript
• Use AI-assisted coding tools to move faster and raise quality
• Work directly with product owners and analysts to turn ambiguous requirements into clear solutions
• Champion automated testing, CI/CD and good engineering practice
• Troubleshoot and resolve issues in production
• Mentor less experienced engineers as the team grows

What You'll Need

Essential:

• Solid commercial experience as a full stack or backend-leaning engineer
• Strong C#, .NET and ASP.NET skills, ideally with Entity Framework
• Good relational database experience with SQL Server or PostgreSQL
• Working React experience... you don't need to be a front-end specialist
• Experience building and integrating APIs (REST, GraphQL or WebSockets)
• Comfortable owning features end to end within an Agile, autonomous team
• A curious, problem-solving mindset and the confidence to learn new technologies quickly
• Able to work three days a week from Belfast

Desirable:

• AWS and containerisation (Docker, Kubernetes)
• Exposure to AI-assisted coding tools, microservices or event-driven systems
• Interest in financial or commodities markets... not essential, you'll learn it here

Why Apply?

• Salary of £55,000
• Hybrid working: three days a week in the Belfast office
• Excellent Annual leave and benefits package
• Greenfield product with real ownership and start-up pace, backed by the security of an established global business
• A clear route to lead and principal level... the team's current principal engineer progressed along this exact path
• A team that expects you to grow, so gaps in your skill set are something to develop, not a barrier
• Modern ways of working, with AI-assisted development already part of the day job
• A practical interview process built around real scenarios and collaboration, not trick questions or syntax trivia