{"id":1694752,"url":"https://alion.io/job/interactive-brokers-sr-software-developer-trading-platform","title":"Sr Software Developer - Trading Platform","company":{"id":58627,"name":"Interactive Brokers","domain":"interactivebrokers.com","url":"https://alion.io/company/interactive-brokers","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Dayforce","truth_index":{"grade":"B","score":75,"open_postings":50,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-05T05:45:15Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Greenwich, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":130000,"max_usd":240000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":2745},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"Git","optional":false},{"name":"Java","optional":false},{"name":"React Native","optional":false},{"name":"WebSockets","optional":false},{"name":"AI Agents","optional":true},{"name":"Claude Code","optional":true},{"name":"Gradle","optional":true},{"name":"JavaScript","optional":true},{"name":"Linux","optional":true},{"name":"React.js","optional":true}],"status":"live","first_seen_at":"2026-07-23T10:00:00Z","employer_posted_date":"2026-10-02","last_verified_at":"2026-10-05T23:21:37Z","board_verified":true,"closed_at":null,"days_open":74,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":74},"description":"This is a hybrid role (3 days in the office/2 days remote).\nAbout your team: \nThe Interactive Brokers Trading team is seeking an experienced Senior Software Developer to join the group building the high-performance, scalable trading application that our clients use to trade stocks, futures, options, and other financial instruments. The platform is mature and feature-rich, and we are continuously extending it with new capabilities, improving performance, and refining the experience for a demanding global user base. You will contribute to a Java-based product that our customers rely on in real time.\nWhat will be your responsibilities within IBKR: \nDesign, develop, and maintain features across the trading application, with a primary focus on the Java business layer. \nIntegrate with backend services over REST, WebSockets, and FIX to deliver responsive, reliable functionality to end users. \nParticipate in the full software development lifecycle, including design, implementation, unit testing, code review, and ongoing maintenance of the features you deliver. \nCollaborate with business analysts, product managers, and other developers to translate requirements into high-quality software. \nWrite and maintain clear technical documentation for the code and designs you produce. \nInvestigate and resolve complex technical issues across the stack. \nStay current with relevant tools, libraries, and techniques that can improve the platform. \nSkills Required:\nMaster's degree in Computer Science or a related field with a minimum of 3 years of professional software development experience, or a Bachelor's degree in Computer Science or a related field with a minimum of 5 years of professional software development experience. \nStrong proficiency in Java, with a deep understanding of object-oriented programming and software design patterns. \nSolid software development fundamentals, including writing clean, maintainable, well-tested code and producing clear documentation. \nWorking knowledge of multithreading and concurrency, with an appreciation for lean, low-latency programming. \nProficiency with Git for source control and collaborative development. \nStrong analytical and problem-solving skills, with the ability to troubleshoot complex technical issues across a large codebase. \nExcellent verbal and written communication skills. \nTo be successful in this position, you should be:\nExperience with declarative, state-driven UI frameworks (React Native, Flutter, QML, etc.); prior Qt/QML experience is a plus, but genuine interest in learning it is equally valued. \nPrior work on financial trading platforms and familiarity with instruments such as stocks, futures, and options, or a strong interest in learning the domain. \nExposure to Linux as a development or deployment environment. \nWorking familiarity with Gradle as a build automation tool. \nAwareness of AI-assisted development tools such as Claude Code and other agentic coding tools. \nComfortable working within an established codebase, following existing architectural patterns, team conventions, and development protocols. \nAble to ramp up quickly on a mature platform and deliver incremental value while respecting existing design decisions. \nFlexible and pragmatic, with the judgment to know when to follow precedent and when to raise a well-reasoned alternative. \nSelf-motivated and able to handle tasks with minimal supervision in a fast-paced team. \nHigh-ownership mindset, taking features from design 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