{"id":2010539,"url":"https://alion.io/job/londonstockexchange-senior-java-engineer","title":"Senior Java Engineer","company":{"id":44904,"name":"London Stock Exchange","domain":"londonstockexchange.com","url":"https://alion.io/company/londonstockexchange","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Welcome to the Jungle","truth_index":{"grade":"A","score":95,"open_postings":16,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":70,"computed_at":"2026-10-17T05:46:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":104000,"max_usd":198000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":125},"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Java","optional":false},{"name":"Python","optional":false},{"name":"Agile","optional":true},{"name":"AI Agents","optional":true},{"name":"Apache Kafka","optional":true},{"name":"CI/CD","optional":true},{"name":"Docker","optional":true},{"name":"GitLab","optional":true},{"name":"Jenkins","optional":true},{"name":"Kubernetes","optional":true},{"name":"LangChain","optional":true},{"name":"LangGraph","optional":true},{"name":"Oracle","optional":true},{"name":"PostgreSQL","optional":true},{"name":"Redis","optional":true},{"name":"Rest API","optional":true},{"name":"Scrum","optional":true},{"name":"Spring Boot","optional":true},{"name":"SQL","optional":true}],"status":"live","first_seen_at":"2026-09-20T00:14:26Z","employer_posted_date":"2026-10-07","last_verified_at":"2026-10-18T07:14:10Z","board_verified":true,"closed_at":null,"days_open":28,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":28},"description":"Join the London Stock Exchange Group (LSEG) as a Senior Java Engineer in Fort Mill. You will be responsible for the development of a new Index platform, collaborating with global teams, and ensuring high-quality products. You should have 10+ years of backend software engineering experience, expertise in core Java and Python, and a strong understanding of algorithms and data structures. Experience in financial services is a plus.\nMissions\nDesign, develop, and maintain complex Java and Python-based applications and services, ensuring high standards of quality and performance.\nCollaborate with cross-functional teams to gather requirements, implement sophisticated algorithms, and deliver outstanding products.\nLead individual project priorities, perform code reviews, mentor junior developers, and provide Level 3 production support.\nProfil recherché\n - Good command of coding standards and Strong understanding of both high level and low level software design- Prior exposure to Level 3 production support\n- 10+ years of hands-on backend software engineering experience\n- A proactive, creative engineering leader who enjoys solving complex problems, working hands-on with modern technologies, and driving AI enabled innovation. If you’re passionate about building resilient, intelligent, data intensive systems that power global financial markets, we’d love to hear from you\n- Support the organisation’s AI adoption journey. Develop and enhance intelligent solutions using LLMs, LangChain/LangGraph, and agentic AI frameworks\n- CI/CD tools (Jenkins/GitLab), DevOps automation\n- Establish engineering best practices for safe, scalable, traceable and production ready AI deployments across internal platforms and external product suites\n- Building highly distributed, data intensive systems\n- Expertise in:\n- Core Java, Python\n- Docker, Kubernetes\n- Strong algorithms, data structures, problem solving skills, and ability to translate business problems into scalable solutions\n- RDBMS (Oracle/SQL Server/Postgres)\n- JVM profiling & performance optimisation\n- Microservices, REST APIs\n- What We’re Looking For:\n- Experience leading or mentoring a team of engineers\n- Experience within financial services or with financial market data\n- Familiarity with in-memory caching, Spring Boot, Redis, Kafka\n- Experience with BDD frameworks such as Cucumber, JBehave, or Karate\n- Background as a Scrum Master or experience running Agile teams","description_format":"text","description_chars":2435,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-07T13:01:52Z"}],"visa":[],"liveness":{"score":78,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.865,"p_room":0.9,"age_days":27,"expected_fill_days":70,"reasons":["conf:0","velocity","win:mid"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/londonstockexchange-senior-java-engineer","json_url":"https://alion.io/job/londonstockexchange-senior-java-engineer.json","meta":{"generated_at":"2026-10-18T07:34:26Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":11273,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-19T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":44904},"rest":"https://alion.io/mcp/rest/get_company?id=44904"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Flondonstockexchange-senior-java-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Flondonstockexchange-senior-java-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Flondonstockexchange-senior-java-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/londonstockexchange-senior-java-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Flondonstockexchange-senior-java-engineer"}]}