Senior Software Engineer - (Java/AI) Client Platform

IG KnowHow; City Of London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Hybrid work (3 days in office)

Competitive salary

Flexible Benefits Package (12%)

Private medical cover for you and your

Life insurance

Gym memberships

25 Days holiday (+ birthday & charity)

Job summary

IG Group is seeking a Senior React Native Engineer for its Client Platform to advance AI-assisted coding, testing, and deployment within a high-scale fintech environment. You’ll own React Native architecture, drive performance improvements, and build tooling that safely connects AI capabilities to Jira, GitLab, and our CI/CD pipeline.

The role emphasizes automation, security, and production ownership. You will mentor peers, collaborate with product and security teams, and help define standards

Qualifications

• Strong background as a Software Engineer with production systems experience.
• Highly skilled in React Native and UI development, improving performance and architecture.
• Fluency in test-driven development and pair programming as practices.
• Real ownership: designed, built, deployed, and supported features in production.
• Interest in automation and using AI tools in engineering workflows.

Responsibilities

• Apply React Native and UI expertise to improve performance and code quality across the Client Platform.
• Build and maintain internal tooling embedding AI into day-to-day engineering work.
• Contribute to observability of the AI-assisted pipeline and track tooling effectiveness.
• Identify manual steps in coding/testing/releases and help automate them.
• Split work into small releasable pieces and ship continuously.

Skills

React Native

UI development

Test-driven development

Code review

Technical judgement

Tools

Jira

Confluence

GitLab

Job description

Job Title Senior React Native Engineer - Client Platform

Job Description

So, who are we? IG Group is a FTSE 100 fintech operating across five continents, serving over 1.4m customers and handling billions of dollars in transactions – built on scale, trust, and proof. We didn't pivot to innovation; it's how we've always operated. What that means for the people who work here is real: genuinely complex problems to solve, the technology and resources to tackle them properly, and the kind of scope that's rare in established businesses. The bar is high – bring a curious and forward-thinking mindset and we'll give you the platform to define what comes next. Join us at IG – the future gets built here.

Your team:

We're looking for a Senior React Native Engineer to join our Client Platform team to push hard on AI across our React Native and UI engineering practice: AI-assisted coding, testing and deployments, shift left on security, defect triage and observability, and the internal tooling that connects our AI tools safely to Jira, GitLab, and our CI/CD pipeline. You'll bring strong React Native and front-end UI expertise, with a sharp eye for component architecture, performance, and cross-platform consistency. This is a hands-on role. You'll build tooling yourself, and you'll help set how your team adopts it.

Your role in the Team’s Success:

This role suits engineers with a strong grounding in software engineering practice: test-driven development, pair programming, and real ownership of systems from design through to production support, with real depth in Java or a comparable backend service ecosystem. The fundamentals matter most: engineers who can write their own tests, review their own designs, and catch their own defects, and who use AI to extend that practice further and faster. Growing into the person the whole group comes to for technical judgement is part of the role.

Our ambition:

The long-term goal is a pipeline where AI agents handle the bulk of coding support, testing, and triage end-to-end, largely unattended, with engineers stepping in for genuine judgement calls and exceptions. We’re early on that path today, and we want someone in this role who treats the destination as real and pushes their team toward it deliberately.

What you’ll do:

• Apply highly skilled React Native and UI expertise to improve application performance, architecture, and code quality across the Client Platform.
• Build and maintain internal tooling that embeds AI into day-to-day engineering work: coding assistants, AI-assisted test generation, deployments, and defect triage.
• Contribute to observability in the AI-assisted pipeline, so every stage shows what the tooling is doing, catching, and missing.
• Identify manual steps in coding, testing, and release that can run largely unattended, and help build the automation to get there.
• Split work into small, releasable pieces that ship continuously.
• Work closely with a product person on your product domain, so what you build is grounded in real delivery.
• Treat improving ways of working and driving AI adoption as a fundamental, ongoing part of delivering value.
• Work with the test and PM function to bring AI into the testing pipeline: exploratory test generation, defect clustering, flaky-test detection, and smarter prioritisation of what to test.
• Evaluate and help roll out LLM-based developer tools, for example Claude Code and similar, integrating them safely with our Jira, Confluence, and GitLab environments.
• Follow and help refine standards for responsible AI use in the SDLC: data handling, prompt hygiene, and guardrails around production and customer data.
• Mentor less experienced engineers on effective use of AI tooling, as well as React Native architecture and performance best practices.
• Work with security and compliance to make sure AI tooling meets IG's regulatory and data-handling requirements.
• Track the metrics that show whether AI tooling is helping: cycle time, defect escape rate, test coverage, delivery turnaround.
• Iterate based on what the data shows.

What you’ll need for this role:

• Extensive background as a Software Engineer, with demonstrated technical judgement on production systems.
• Highly skilled in React Native and UI development, with a strong track record of improving performance and architecture in production applications.
• Strong fluency in test-driven development and pair programming as working disciplines.
• Real ownership experience: you've designed features or systems, built them, deployed them, and supported them in production.
• A genuine appetite for aggressive automation. You get energised by removing manual steps entirely.
• Some experience evaluating or using LLM-based developer tools in a real engineering environment.
• Preferred Experience with MCP, agentic tooling, or Spec Driven Development.
• Familiarity with the Atlassian ecosystem (Jira, Confluence) and its APIs.
• Prior experience in financial services, trading platforms, or another regulated, high-reliability environment.

The Perks:

We work hybrid, which means three days in the office.

• Competitive salary
• Flexible Benefits Package on top of your salary (12%)
• Private medical cover for you and your family
• Life insurance
• Contribution to gym memberships
• 25 Days holiday, with 1 additional day off to celebrate your Birthday & 2 additional days off a year for voluntary work (28 in total)
• The option to buy or sell holiday days
• A comprehensive global and local onboarding process
• Enhanced primary (maternity), secondary (paternity), and shared parental pay and leave, as well as a range of support and benefits for parents

Join us for this exciting journey.

Looking for a career at a company that will support you, challenge you and help you grow? IG Group can provide that. IG Group is a FTSE 100 fintech operating across five continents, serving over 1.3m customers and handling billions of dollars in transactions – built on scale, trust, and proof. We didn't pivot to innovation; it's how we've always operated. What that means for the people who work here is real: genuinely complex problems to solve, the technology and resources to tackle them properly, and the kind of scope that's rare in established businesses. The bar is high – bring a curious and forward-thinking mindset and we'll give you the platform to define what comes next. Join us at IG – the future gets built here.