Senior Backend Engineer (Java)

Job Title Senior Backend Engineer (Java) Job Description Minimum compensation: starting from 22 000 PLN. The final offer will be determined based on the candidate's experience and competencies. So, who are we? IG has been at the centre of retail trading and investment since 1974, when we helped create the market for financial spread betting. Today, we're a FTSE100 fintech operating across five continents, serving over 700,000 clients and handling billions in transactions - built on decades of 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 The Lifecycle team is a product-aligned, customer-first engineering team owning onboarding, activation, and engagement experiences across IG's platform. We build and support the critical first-mile customer journey and ongoing engagement features - with an obsessive focus on reducing friction, improving conversion, and driving engineering excellence to ensure our systems are reliable, performant, and easy to change. Your role in the Team's Success You'll be the engineering force behind services that handle massive transaction volumes, real-time market data, and split-second decision making. Your primary responsibility is designing and building backend systems that are robust, observable, and wickedly fast. You won't just write code – you'll own the full lifecycle from architecture to production, ensuring our systems perform flawlessly when millions of pounds are on the line. You'll leverage AI-assisted development tools as a core part of your workflow — we expect engineers to actively embrace AI to multiply their impact. We believe in "you build it, you run it, you love it" – so if that ownership mindset excites you, keep reading. What you'll do Design, build, and maintain high-performance Java services (Spring Boot WebFlux/MVC) that handle real-time trading operations and massive data throughput Own the full stack from code to cloud – architect solutions, build CI/CD pipelines, deploy to Kubernetes (AWS EKS), and keep production humming Partner with Product, Design, and Frontend teams to deliver features that move the needle for our clients and business – not just tick boxes Actively participate in product development, from requirements discussions to seeing customers using your software in production Implement observability that matters – build monitoring, alerting, and tracing (Grafana, Honeycomb, OpenTelemetry) that catches issues before clients notice them Drive technical excellence in performance, scalability, and security – in fintech, "good enough" isn't good enough Troubleshoot and resolve production incidents with urgency and precision – when something breaks at 3am, you're the person who fixes it (and then makes sure it never breaks again) Mentor engineers, lead technical discussions, and raise the bar across the team through thoughtful code reviews and knowledge sharing Leverage AI-assisted development tools to accelerate delivery, improve code quality, and stay at the cutting edge of modern engineering practices Challenge the status quo – question architectural decisions, propose improvements, and help shape our technical direction What you'll need for this role Key Qualification Requirements: Extensive backend engineering experience with Java as your weapon of choice (Spring Boot, REST/gRPC, reactive patterns) Battle-tested experience running production workloads on Kubernetes (AWS EKS preferred) – you've debugged pod crashes at midnight and lived to tell the tale Deep knowledge of relational databases (PostgreSQL) and caching layers (Redis) – you know when to use each and how to make them sing Solid DevOps chops: CI/CD pipelines (GitLab CI), infrastructure-as-code (Terraform), and container orchestration aren't buzzwords to you – they're daily tools Experience with distributed systems, microservice architectures, and the observability tooling needed to keep them healthy A security-first mindset baked into how you design and code – not bolted on as an afterthought Bachelor's degree in Computer Science, Engineering, or equivalent experience from real-world engineering An ownership mindset that borders on obsessive - you treat every system like you built it with your own money AI-positive mindset - you see AI tools as amplifiers of engineering capability, not replacements, and you're excited to push the boundaries of what's possible with AI-assisted development Being a champion for engineering excellence - you advocate for practices like pair programming, test-driven development (TDD), and automated testing not because a process demands it, but because you've seen how they elevate code quality and team capability Strong English-language communication skills and the ability to thrive in globally distributed, cross-functional teams Hunger for continuous learning - you'll gain deep understanding of IG's trading products, financial markets, and the complex regulations that govern them Familiarity with financial services, trading platforms, or crypto/fintech is a plus - but we'll teach you if you bring the engineering firepower Willingness to participate in on-call rotations - production ownership means being there when it counts This is a hybrid position (3 days onsite, 2 days remote work) How we work We try to take a thoughtful approach to our ways of working as a company. We follow a hybrid working model with 3 days in the office -- which we think balances the need to collaborate effectively and connect with each other. When it comes to how we deliver, there are 5 things we want everyone to do to drive high performance, better learning and career satisfaction: Lead and Inspire: Drives trust, alignment, and enthusiasm Think Big: Focus on the problems that most impact commercial outcomes Champion the client: Understand and prioritise client's needs Deliver at pace: Push for fast, sustainable growth; Raise the bar: Take ownership, be accountable and share feedback We believe that diversity is vital to success, it fuels creativity, drives innovation and sets us up for global success. We're committed to building teams with a variety of perspectives and skills to help us realise our vision and strategy, that's why we encourage applications from people with diverse backgrounds and experiences to join us on this journey. Learn more about our D&I approach here. The Perks Your growth fuels our success! Thrive with tailored development programs, mentoring opportunities with leaders, and clear career progression. Expand your network through committees, sports and social clubs. Enjoy extra time off for volunteering and community work. Flexible working hours & hybrid working Home office equipment reimbursement Performance-related bonus Private medical cover for you and your family/partner (Medicover) Multikafeteria system (you can choose a multisport card, vouchers, etc.) Life insurance (Generali) Employee-led LGBTQ+, Women's, Black, and Parents & Carers networks with an annual budget for organizing events & projects that foster an open, diverse, and inclusive culture Career-focused technical and leadership training in-class and online, incl. unlimited access to the LinkedIn Learning platform Well-being events as well as Employee Assistance Programme Summer picnic, New Year party and other social events 3 additional days off a year - 1 to celebrate your Birthday and 2 for voluntary work Learn more about the Perks here! Join us for this exciting journey. Apply now! Number of openings 1 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.