Senior Backend Engineer
Job Description
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About the role
Senior Backend Engineers work across our backend organisation. Your team match will reflect your strengths, interests and where you can contribute most.
Across every team, the model is the same: small, autonomous groups, short release cycles and ownership from problem definition through production.
What you’ll do
- Own backend solutions end to end: understand the business problem, shape the requirements, design the solution, build it, test it, deploy it and run it in production.
- Design and evolve services for performance, scale, resilience and data integrity.
- Make clear technical decisions with a full understanding of the constraints, alternatives and trade-offs.
- Keep code and systems maintainable as products and requirements evolve.
- Diagnose difficult production problems, address their underlying causes and prevent recurrence.
- Work closely with product and engineering colleagues to turn complex requirements into simple, durable solutions.
- Review work critically, share knowledge and raise the engineering standard across the team.
What you need to have
- Proven ownership of backend services built and operated within a microservices architecture.
- A strong grasp of communication protocols such as HTTP, WebSockets and AMQP, including when to apply each.
- Production fluency in at least one modern backend framework.
- Deep knowledge of relational databases, including indexing, transactions, isolation levels, locking mechanisms and high-performance design.
- A track record of designing systems for high availability, scalability and resilience.
- Clear, structured problem-solving and the ability to explain technical decisions and trade-offs.
- Strong engineering fundamentals, sound judgement and confidence learning unfamiliar technologies.
Depth in one backend ecosystem and sound tool choice matter more than familiarity with every technology listed.
What to expect
- Recruiter conversation
- Code Review
- System Design
- Managerial interview
Your recruiter will explain each stage clearly and follow up after every conversation.
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Trading 212
View Company ProfileTrading 212 (operating under trading212.com) is the premier, enterprise-grade fintech brokerage pioneer, democratized asset management innovator, and cross-border financial technology powerhouse engineered to operate as the definitive, high-velocity commission-free stock trading, fractional share investing, and contract-for-difference (CFD) execution layer for retail investors across the United Kingdom, Europe, and global financial markets. The company completely eliminates the severe systemic friction of traditional retail investing—where individual capital builders lose immense wealth-building momentum to predatory per-trade commissions, hidden account custody fees, rigid minimum investment thresholds, and fragmented currency exchange markups—by deploying an advanced, zero-commission multi-asset delivery matrix. Moving far beyond traditional, legacy retail brokerages or basic high-fee financial apps, Trading 212 natively unifies a seamless mobile-first equity ecosystem, automated savings and investment portfolios (\"Pies & AutoInvest\"), tax-free Individual Savings Accounts (ISAs), self-invested personal pensions (SIPPs), and its unique multi-currency payment card featuring zero FX fees at true interbank rates into a single high-availability digital workspace. Managing over 5 million active funded accounts and safeguarding more than £25 billion in total client assets, the platform handles massive transactional concurrency and high-throughput order routing with production-hardened engineering precision. Under the hood, its sophisticated technical architecture coordinates real-time financial market data feeds, high-volume automated collateralized stock lending pipelines, and robust regulatory compliance guardrails strictly audited under elite supervisory bodies including the UK's Financial Conduct Authority (FCA), BaFin in Germany, and CySEC in Cyprus. What sets Trading 212 apart is its uncompromising dedication to replacing complex financial gatekeeping with absolute transactional transparency, cross-border accessibility, and wealth velocity; by bridging the gap between performance-intensive low-level systems engineering and an intuitive, retail-optimized interface, the group remains the definitive cornerstone of modern algorithmic retail investing and worldwide fintech infrastructure transformation.
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