{"id":3970921,"url":"https://alion.io/job/citi-senior-java-full-stack-developer-2","title":"Senior Java Full Stack Developer","company":{"id":7841,"name":"Citi","domain":"citi.com","url":"https://alion.io/company/citi","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":98,"open_postings":557,"ghost_share":0.009,"stale_share":0.206,"repost_share":0.068,"time_to_fill_p50_days":9,"computed_at":"2026-11-09T06:03:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Belfast, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"Copilot","optional":false},{"name":"Cursor","optional":false},{"name":"Devin","optional":false},{"name":"Docker","optional":false},{"name":"Git","optional":false},{"name":"Gradle","optional":false},{"name":"Java","optional":false},{"name":"Jenkins","optional":false},{"name":"JUnit","optional":false},{"name":"Kubernetes","optional":false},{"name":"Maven","optional":false},{"name":"Mockito","optional":false},{"name":"OpenShift","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"Spring Boot","optional":false},{"name":"Spring Security","optional":false},{"name":"SQL","optional":false},{"name":"Tekton","optional":false},{"name":"Testcontainers","optional":false},{"name":"TypeScript","optional":false},{"name":"Apache Kafka","optional":true},{"name":"DuckDB","optional":true},{"name":"JavaScript","optional":true},{"name":"Kotlin","optional":true}],"status":"live","first_seen_at":"2026-11-05T00:00:00Z","employer_posted_date":"2026-11-05","last_verified_at":"2026-11-09T23:14:06Z","board_verified":true,"closed_at":null,"days_open":5,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":5},"description":"We are seeking a high-caliber Applications Development Technical Lead (C13 / Vice President) to spearhead the backend architecture and technical execution of our core Enterprise Vendor & Market Data Services Registry Platform in Belfast.\nIn this pivotal role, you will serve as the senior technical anchor for our Belfast engineering team-driving technical strategy, system architecture, and modern engineering practices while remaining hands-on with mission-critical Java microservices and complex data pipelines. You will collaborate closely with global engineering counterparts, product managers, and enterprise architects to deliver high-throughput data reconciliation, automated ingestion, and robust REST APIs.\nIf you are an experienced senior backend technologist who thrives on building scalable distributed data systems, mentoring talented engineers, and leveraging modern GenAI tools (e.g., Devin, GitHub Copilot, Cursor) to drive high engineering velocity, this role offers an exceptional platform for technical leadership and impact.\nKey Responsibilities & Technical Leadership:\nArchitectural Stewardship & Hands-On Engineering\nArchitect, design, and deliver high-performance, resilient Java (21/25) and Spring Boot microservices powering core enterprise data ingestion, deduplication, and reconciliation engines.\nLead the design and implementation of relational data models, audit trails, and transactional staging pipelines handling complex multi-source data feeds (billing, contracts, and organizational hierarchies).\nDefine, build, and maintain clean, secure, and well-documented RESTful APIs supporting internal maintenance workbenches and downstream analytical consumers.\nChampion cloud-native deployment patterns across containerized platforms (Docker, OpenShift / Kubernetes) with CI/CD automation and strict security governance.\nStrategic Engineering Leadership & Team Mentorship (Indirect Platform Lead)\nAct as the senior engineering authority for the Belfast development hub, shaping technical roadmaps and setting high benchmarks for code quality, architectural integrity, and automated testing.\nMentor and coach mid-level and senior engineers (C11/C12), fostering a culture of continuous learning, technical autonomy, and engineering excellence.\nPartner closely with global product management, domain analysts, and solution architects to translate complex business requirements into clear, phased technical deliverables.\nDrive rapid engineering and innovation by integrating autonomous AI-assisted development tools (such as Devin, GitHub Copilot, and Cursor) across the software development lifecycle.\nFull-Stack Awareness & End-to-End Ownership\nWhile heavily focused on backend architecture and data systems, provide architectural oversight across the full application stack, collaborating effectively with frontend engineers building modern React/TypeScript maintenance interfaces.\nEnsure seamless end-to-end integration, predictable API contracts, and consistent telemetry/monitoring across all tiers.\nTechnical Profile & Qualifications:\nRequired Technical Skills:\n7+ years of hands-on software engineering experience with deep expertise in Modern Java (Java 21/25) and the Spring Ecosystem (Spring Boot, Spring Data, Spring Security).\n Data Engineering & Architecture: Strong experience with relational databases (Oracle, PostgreSQL), complex SQL, schema design, data deduplication, batch/stream processing, and transaction management.\nDistributed Systems & API Design: Proven track record designing enterprise RESTful APIs, microservices architectures, and event-driven patterns.\n Modern DevOps & Tooling: Solid experience with Git, Maven/Gradle, automated CI/CD pipelines (Tekton, Jenkins), containerization (Docker, OpenShift/K8s), and automated testing frameworks (JUnit 5, Mockito, Testcontainers).\n AI-Accelerated Engineering: Active practitioner or champion of AI coding assistants (Devin, Copilot, Cursor) to accelerate prototyping, code generation, and test coverage.\nLeadership & Soft Skills:\nDemonstrated experience acting as a lead engineer, technical authority, or architectural mentor within enterprise or high-scale environments.\nExcellent communication skills with the ability to articulate complex technical trade-offs to senior business and technology stakeholders.\nStrong pragmatic problem-solving skills with a focus on delivering incremental business value.\nNice-to-Have / Valuable Extras:\nFamiliarity with modern frontend ecosystems (React, TypeScript, State Management) and end-to-end UI-to-backend integration.\nExposure to Market Data systems, financial data models, or vendor contract management domains.\nExperience with high-performance analytics engines or in-memory data processing (DuckDB, Parquet, Kafka).\nEducation & Experience\nBachelor’s / Master’s degree in Computer Science, Software Engineering, or equivalent practical experience.\nTrack record of technical delivery and leadership in mid-to-large scale enterprise technology organizations.\nWhat we offer:\nWe work hard to have a positive financial and social impact on the communities we serve. In turn, we put our employees first and provide the best-in-class benefits they need to be well, live well and save well.\nBy joining Citi Belfast, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:\nGenerous holiday allowance starting at 27 days plus bank holidays; increasing with tenure\nA discretional annual performance related bonus \nPrivate medical insurance packages to suit your personal circumstances\nEmployee Assistance Program \nPension Plan \nPaid Parental Leave \nSpecial discounts for employees, family, and friends \nAccess to an array of learning and development resources \nAlongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self every day. We want the best talent around the world to be energized to join us, motivated to stay, and empowered to thrive.\nSounds like Citi has everything you need? Then apply to discover the true extent of your capabilities.\n#LI-KK5\nThis job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.\n------------------------------------------------------\nJob Family Group:\nTechnology------------------------------------------------------\nJob Family:\nApplications Development------------------------------------------------------\nTime Type:\nFull time------------------------------------------------------\nMost Relevant Skills\nPlease see the requirements listed above.------------------------------------------------------\nOther Relevant Skills\nFor complementary skills, please see above and/or contact the recruiter.------------------------------------------------------\nCiti is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.\nIf you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi.\nView Citi’s EEO Policy Statement and the Know Your Rights poster.","description_format":"text","description_chars":7495,"description_truncated":false,"requirements":{"experience_years_min":7,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Continuous learning","Health insurance","Hybrid work","Parental leave"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Cards & Card Issuing","Wealth Management & Financial Advisors","Payment Processing & Gateways","Investment Banking & M&A Advisory"],"lifecycle":[{"event":"open","at":"2026-11-09T16:03:40Z"}],"visa":[{"country":"GB","licensed_sponsor":true,"adverts_offering_sponsorship_24m":0,"sanctioned_now":false,"evidence":"Licensed UK visa sponsor (Senior or Specialist Worker, Graduate Trainee, Skilled Worker)","filings_12m":null,"filings_prev_12m":null,"green_card_filings_12m":null,"median_offered_wage_usd":null,"route":"Global Business Mobility: Senior or Specialist Worker; Global Business Mobility: Graduate Trainee; Skilled Worker","cap_exempt":false,"checked_at":"2026-11-09T07:32:21+00:00","sources":["UK Home Office: register of licensed sponsors (workers)"],"filings_for_role_12m":0}],"liveness":{"score":77,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.858,"p_room":0.9,"age_days":5,"expected_fill_days":9,"reasons":["conf:1","win:mid","comp:brand"],"computed_at":"2026-11-10T00:51:38Z"},"pay":null,"html_url":"https://alion.io/job/citi-senior-java-full-stack-developer-2","json_url":"https://alion.io/job/citi-senior-java-full-stack-developer-2.json","meta":{"generated_at":"2026-11-10T00:51:38Z","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":1851,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-11T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":7841},"rest":"https://alion.io/mcp/rest/get_company?id=7841"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fciti-senior-java-full-stack-developer-2"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"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%2Fciti-senior-java-full-stack-developer-2"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Fciti-senior-java-full-stack-developer-2"},{"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/citi-senior-java-full-stack-developer-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fciti-senior-java-full-stack-developer-2"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3970921}},{"tool":"search_jobs","arguments":{"company":"citi.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3970921},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. Docs: https://alion.io/developers"}}