Senior Java Developers ( NEW TO NI )

We are hiring Senior and Mid-Level Software Engineers to join a high-performance engineering team building distributed, event-driven financial systems at scale.

These roles sit within a fast-moving, product-focused environment working on high-availability trading and payments platforms. You will design, build and optimise cloud-native services with a strong emphasis on reliability, performance and secure engineering practices.

For senior roles, we are seeking deep Java expertise. For mid-level roles, we welcome engineers from strong OO backgrounds who want to develop deep JVM expertise on the job.

What You'll Do

• Build and maintain cloud-native distributed systems
• Work on highly available, event-driven architectures
• Develop JVM-based services with a focus on performance and scale
• Optimise runtime behaviour and troubleshoot production workloads
• Contribute to system design, code reviews and best-practice engineering
• Collaborate with cross-functional teams across product, platform and operations
• Ship reliable, secure and well-tested software into production

Senior Engineer - Must Have

• Strong experience with Java and JVM performance optimisation
• Expertise in event-driven architecture
• Commercial experience building distributed systems
• Hands-on AWS experience (ECS, Lambda, SQS, SNS, Kinesis or similar)

Mid-Level Engineer - You Will Have

• Solid foundation in object-oriented development (Java / C# / Go / Python)
• Desire to develop deep JVM expertise - mentoring and support provided
• Understanding of cloud-native systems and modern software delivery practices

Nice to Have

• Financial systems or low-latency engineering exposure
• Experience in trading, payments, capital markets, or fintech
• Knowledge of digital assets & crypto-native systems

What You'll Bring

• A mindset for performance, scale and clean engineering
• Curiosity, ownership and hunger to learn
• Ability to operate in a fast-paced, product-driven culture
• Pragmatic problem-solving and strong communication skills