{"id":650310,"url":"https://alion.io/job/trading-212-senior-backend-engineer","title":"Senior Backend Engineer","company":{"id":51399,"name":"Trading 212","domain":"trading212.com","url":"https://alion.io/company/trading-212","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":80,"open_postings":10,"ghost_share":0,"stale_share":0.8,"repost_share":0,"time_to_fill_p50_days":27,"computed_at":"2026-10-13T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":["ES"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":58000,"max_usd":124000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":13},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"WebSockets","optional":false},{"name":"Apache Kafka","optional":true},{"name":"AWS","optional":true},{"name":"ClickHouse","optional":true},{"name":"Docker","optional":true},{"name":"ElasticSearch","optional":true},{"name":"Go","optional":true},{"name":"Grafana","optional":true},{"name":"Java","optional":true},{"name":"JavaScript","optional":true},{"name":"Kibana","optional":true},{"name":"Kubernetes","optional":true},{"name":"MariaDB","optional":true},{"name":"Node JS","optional":true},{"name":"PostgreSQL","optional":true},{"name":"Redis","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-08-25T15:48:10Z","employer_posted_date":"2026-08-25","last_verified_at":"2026-10-13T10:18:43Z","board_verified":true,"closed_at":null,"days_open":48,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":48},"description":"Our mission is to enable everyone to build wealth\nWe reinvent how trading and investing work by creating exceptional products people love.\nThat takes high standards, high velocity and engineers who own what they ship.\nToday, we serve over 6 million clients, with more than €38 billion in assets under management - a testament to the scale and trust we have built in just a few years. At that scale, performance, reliability and data integrity are part of the product.\nOur platform is powered by a modern, high-performance engineering stack designed for scale and reliability: Java 21 (Spring), Go, Node.js (TypeScript), PostgreSQL, MariaDB, Redis, Kafka, ClickHouse, Elasticsearch, Docker, Grafana, AWS, Kubernetes and Kibana.\nAbout the role\nSenior Backend Engineers work across our backend organisation. Your team match will reflect your strengths, interests and where you can contribute most.\nAcross every team, the model is the same: small, autonomous groups, short release cycles and ownership from problem definition through production.\nWhat you’ll do\nOwn 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.\n\nDesign and evolve services for performance, scale, resilience and data integrity.\n\nMake clear technical decisions with a full understanding of the constraints, alternatives and trade-offs.\n\nKeep code and systems maintainable as products and requirements evolve.\n\nDiagnose difficult production problems, address their underlying causes and prevent recurrence.\n\nWork closely with product and engineering colleagues to turn complex requirements into simple, durable solutions.\n\nReview work critically, share knowledge and raise the engineering standard across the team.\n\nWhat you need to have\nProven ownership of backend services built and operated within a microservices architecture.\n\nA strong grasp of communication protocols such as HTTP, WebSockets and AMQP, including when to apply each.\n\nProduction fluency in at least one modern backend framework.\n\nDeep knowledge of relational databases, including indexing, transactions, isolation levels, locking mechanisms and high-performance design.\n\nA track record of designing systems for high availability, scalability and resilience.\n\nClear, structured problem-solving and the ability to explain technical decisions and trade-offs.\n\nStrong engineering fundamentals, sound judgement and confidence learning unfamiliar technologies.\n\n Depth in one backend ecosystem and sound tool choice matter more than familiarity with every technology listed.\nBring your ambition to Europe’s fastest-growing mobile 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