Java Software Engineer

About the company: Apexon is a digital-first technology services firm specializing in accelerating business transformation and delivering human-centric digital experiences. We have been meeting customers wherever they are in the digital lifecycle and helping them outperform their competition through speed and innovation Apexon brings together distinct core competencies – in AI, analytics, app development, cloud, commerce, CX, data, DevOps, IoT, mobile, quality engineering and UX, and our deep expertise in BFSI, healthcare, and life sciences – to help businesses capitalize on the unlimited opportunities digital offers. Our reputation is built on a comprehensive suite of engineering services, a dedication to solving clients' toughest technology problems, and a commitment to continuous improvement. Backed by Goldman Sachs Asset Management and Everstone Capital, Apexon now has a global presence. Role Summary We're looking for ambitious, talented, technical Java engineers to help build out Orion, with the US Clearing convergence as a defining near-term priority. This is a hands-on delivery role, and we're looking for engineers who bring genuine quality and excellence to their work: meticulous attention to detail, a motivated and self-driven approach, and a progressive mindset that continually raises the bar rather than settling for "good enough." Your Impact You will become a fully integrated member of the global development team, building and extending Orion, directly contributing to the accelerated delivery of our US Clearing convergence program. You have the opportunity to work with existing Operational and legacy platform SMEs to gain a deep understanding of the business, as well as growing your technical skills alongside the strong team of junior and senior Orion developers. Responsibilities

• Build and maintain low-latency Java components within Orion, following its established platform patterns
• Own delivery end-to-end: implementation, testing, migration cutover support, and production support
• Investigate production issues and drive root-cause analysis, translating findings into durable fixes
• Uphold high standards of execution quality — strong test coverage and performance discipline, especially given increased load from convergence
• Support incident management, post-incident remediation, and UAT for products migrating onto Orion Required Qualifications
• Bachelor's or Master's degree in Computer Science or a related technical field
• 5+ years of professional backend development in Java, with strong command of core language features, concurrency, and JVM performance
• Solid understanding of distributed systems concepts — messaging, event ordering, consistency, fault tolerance
• Strong problem-solving and root-cause analysis skills in high-volume production environments
• Experience with relational or object-oriented data stores (e.g., PostgreSQL, MongoDB)
• Clear, confident communication with business and operations stakeholders
• High ownership — able to work independently and deliver in a fast-paced environment, especially during active migration
• Genuine focus on execution quality: well-tested, maintainable, performant code
• Experience with sequencer-based, event-sourced architectures. Preferred Qualifications
• Experience of Realtime, high volume platforms in an Equities environment.
• Exposure to securities clearing, settlement, custody, or regulatory reporting
• Experience with large-scale platform migrations or system consolidations
• Familiarity with high-performance messaging/middleware (e.g., Kafka, Chronicle Queue, Aeron, Solace)
• UNIX/Linux experience and JVM performance tuning