Senior Backend Engineer

Posted 5 Days Ago
Be an Early Applicant
Kraków, Małopolskie
In-Office
18K-18K Annually
Senior level
Fintech • Payments • Financial Services
The Role
Design and build high-performance backend systems for a trading platform, ensuring robust data handling and system reliability. Lead technical discussions, mentor engineers, and embrace AI-assisted tools in a collaborative team environment.
Summary Generated by Built In

Job Title

Senior Backend Engineer

Job Description

Minimum compensation: starting from 18 000 PLN. The final offer will be determined based on the candidate's experience and competencies.

Join the game-changers! 

Power the systems that execute millions of trades across the world. As an experienced engineer, you'll architect and build the high-performance, mission-critical services that run our award-winning trading platforms. When markets move fast, your code moves faster - processing real-time data streams, executing complex business logic, and ensuring every transaction happens flawlessly. Join us on our sprint towards the FTSE 100. 

So, who are we?

Hello, we're IG Group. We are a publicly-traded FTSE250 FinTech company who run mobile, web and desktop platforms that help our clients trade stocks & shares, leveraged products, Futures & Options and Crypto.

We are ambitious. Over 340,000 people already use our platforms. We're global with offices in 18 countries and products in 16 regions. We're hungry to move faster, ship better product for our customers and grow our user base. We believe in high autonomy, and we want people who are looking to do things differently in order to create better experiences for our customers.

We work in cross-functional teams and are laser focused on increasing the number of active clients we serve to drive sustainable growth.

Your team

We are IG UK's Crypto product engineering team, having successfully delivered the company's #1 strategic priority - a fully licensed, FCA-regulated crypto trading platform launched in December 2025. We maintain elite engineering standards through cloud-native AWS architecture, comprehensive observability, and a culture of end-to-end ownership where engineers drive product outcomes, not just technical deliverables.

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 

Who we're are looking for? 

For this role, we're looking for someone with: 

  • 8+ years of 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 

What you'll need for this role

Key Qualification Requirements:

  • 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.

  • Home office equipment reimbursement   

  • Performance relate bonus 

  • Private medical cover for you and your family/partner (Medicover) 

  • Multikafeteria system (you can choose a multisport card, vouchers, etc.)  

  • Life insurance (Generali)  

  • LinkedIn Learning platform free access 

  • Share Plans for Employees 

  • 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 LinkedIn Learning platform 

  • Well-being events as well as Employee Assistance Programme 

  • Summer picnic, New Year party and other social events   

  • Three additional days off a year - one to celebrate your Birthday and two for voluntary work 

  • App-based parking spots booking system 

  • Stretching sessions 

  • Wellbeing weeks 

Learn more about the Perks here!

Join us for this exciting journey. Apply now!

Number of openings

1

Top Skills

Aws Eks
Gitlab Ci
Grafana
Honeycomb
Java
Kubernetes
Opentelemetry
Postgres
Redis
Spring Boot
Terraform
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The Company
HQ: London
2,748 Employees

What We Do

We’ve been at the forefront of trading innovation since 1974, taking on the challenge to deliver an unmatched experience for our clients and raise the bar for tomorrow’s opportunities.

Today, we’re a global fintech company incorporating the IG, tasty, IG Prime, Spectrum and DailyFX brands, with a presence in 18 countries across five continents – Europe, North America, Africa, Asia-Pacific and the Middle East.

We’re an organisation of positive problem-solvers, united and inspired by our purpose, which is to power the pursuit of financial freedom for the ambitious. Our award-winning products and platforms empower go-getters the world over to unlock opportunities around the clock, giving them access to over 19,000 financial markets.

Today, more than 400,000 clients call IG Group home.

IG Group Holdings plc is an established member of the FTSE 250 and holds a long-term investment grade credit rating of BBB- with a stable outlook from Fitch Ratings

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