Senior Fullstack Engineer (Go/React)

Working at the company

The company is an  AI-native consulting partner  where people do work that matters and are supported to do it well. We work alongside organisations such as PayPal, adidas, NatWest, FanDuel and Money Saving Expert, building digital products and services that make a difference  while always putting people first.

We’re a team of creators. We write code, shape delivery, build go-to-market strategies, develop AI solutions and create the practices that support our people. We work side by side with our clients, challenging what’s not working and helping them to build the future. Our commitment to craft, quality, and culture has helped us scale to over 600 people in just a few years.

The company is a Great Place to Work-Certified™ company and has won Best Workplaces UK multiple years in a row.

We're looking for an experienced Senior Fullstack Engineer who is passionate about building scalable, high-quality software and helping teams grow. This is more than a hands-on engineering role—you'll influence technical direction, mentor other engineers, drive architectural decisions, and help us embed AI and automation into the way we deliver value for our clients.

You'll thrive here if you enjoy solving complex problems, challenging assumptions, collaborating openly, and taking pride in delivering software that makes a real business impact.

What You'll Do

As a Senior Fullstack Engineer, you will

• Design, build and maintain scalable, secure and resilient backend systems using Go, alongside rich, responsive frontends built with React.

• Lead technical design and architectural discussions, ensuring solutions are maintainable, performant and aligned with best practices across the stack.

• Develop and evolve RESTful and gRPC APIs with a focus on security, versioning, performance and reliability.

• Build intuitive, high-performance user interfaces in React that integrate seamlessly with backend services.

• Champion engineering excellence through clean code, automated testing, documentation and code reviews.

• Drive delivery across multiple initiatives while balancing speed, quality and commercial value.

• Mentor engineers through coaching, pairing and constructive feedback, helping raise capability across the team.

• Collaborate with cross-functional teams to solve problems together and deliver outstanding outcomes for clients.

• Research and evaluate emerging technologies, frameworks and AI capabilities that improve how we build software.

• Promote automation wherever possible, removing repetitive work so teams can focus on solving meaningful problems.

• Contribute to a culture of continuous learning, innovation and technical excellence

What You'll Bring

Technical Expertise

You'll have strong commercial experience with

• Go, including interfaces, error handling, generics and the standard library

• Go concurrency patterns, including goroutines, channels and the context package

• React, including modern hooks-based development and state management

• TypeScript for building robust, type-safe frontends

• Go web frameworks and routers such as net/http, Gin, Echo or Chi

• Data access in Go using tools such as database/sql, sqlx, sqlc or GORM

• Authentication and authorisation including OAuth2, OIDC and JWT

• REST API design and implementation, with exposure to gRPC and Protocol Buffers

• Microservices and distributed system design

• SQL databases with strong query optimisation skills

• NoSQL databases

• Messaging technologies such as Kafka or RabbitMQ

• Docker and containerised application development

• Cloud platforms, AWS

• CI/CD pipelines using tools such as Jenkins, GitLab CI or GitHub Actions

• Git and modern software development workflows

• Observability tooling including logging, metrics and distributed tracing (e.g. OpenTelemetry, Prometheus)

• Comprehensive testing across unit, integration and functional layers, including Go's built-in testing tooling and frontend testing frameworks such as Jest or React Testing Library

• Go modules and dependency management

• Go performance fundamentals, including profiling with pprof, memory management and garbage collection behaviou

You'll demonstrate

Technical Excellence & Craft Mastery

• Write clean, maintainable and highly optimised code across both backend and frontend.

• Set high standards for quality, testing and documentation.

• Coach others in engineering best practices and modern development techniques.

Architectural Leadership

• Design scalable, resilient and secure systems.

• Make thoughtful architectural decisions that support long-term maintainability.

• Evaluate new technologies and guide adoption where they add value.

Commercial Delivery

• Lead projects from discovery through delivery.

• Understand client challenges and translate them into practical technical solutions.

• Deliver outcomes that create measurable business value.

Leadership & Collaboration

• Lead engineering ceremonies and facilitate productive technical discussions.

• Mentor and develop engineers across the team.

• Communicate effectively with both technical and non-technical stakeholders.

• Foster an environment where knowledge sharing and continuous improvement are part of everyday work.

AI & Innovation

• Explore and implement AI-driven approaches that improve engineering efficiency.

• Champion responsible adoption of AI across delivery teams.

• Help shape our engineering practices for the future.

What we’ll offer you

We trust people to do their best work. That means flexibility over rigid rules, impact over activity, and real investment in your growth both professionally and personally. You’ll be part of a supportive, and friendly culture, surrounded by smart, curious people who care deeply about what they do.

We offer flexible working, including hybrid and remote options. Our office hubs are located in Edinburgh, Leeds, Manchester, London and Bulgaria, with occasional travel to client sites or the company offices when needed.

We trust you to manage your time balancing collaboration with client time and focused work. What matters is the impact you have, not how busy you look.

Our hiring process

We try to keep our hiring process clear, fair and respectful of your time. We aim to get back to everyone who applies and we will be upfront about where you are in the process.

It usually looks like this

• Call with our Talent Acquisition Team

• Role specific capability interview

Depending on the role, we might also ask you to do a short presentation, a practical or technical task or have a values focused conversation. We will explain what is involved before anything happens.

Inclusion at the company

We believe diverse teams build better workplaces and better products. We want the company to be a place where people feel able to be themselves and do their best work.

If you need any adjustments or support during the application process, just. We will do what we can to help.

We look forward to your application!