Software Engineer (FinTech)

G MASS is supporting a global FinTech organisation with the expansion of a core engineering team building enterprise-scale, AI-enabled data products. This role sits within a highly collaborative, Agile engineering environment focused on delivering scalable, cloud-native platforms used across the business.

You’ll work as part of a senior engineering group responsible for designing, building and maintaining high-performance software components within a distributed data ecosystem. The focus is on clean architecture, modern Java development and strong engineering practices.

Key Responsibilities

• Design, develop and maintain scalable software and data-modelling components within a distributed platform
• Translate business and technical requirements into robust, well-designed solutions
• Apply best-practice software engineering standards including code reviews, TDD and CI/CD
• Troubleshoot and resolve complex software defects and performance issues
• Actively participate in Agile ceremonies including sprint planning, stand‑ups, demos and retrospectives
• Mentor junior engineers through code reviews, pairing and knowledge sharing
• Contribute to architectural decisions to ensure scalability, reliability and security
• Produce and maintain clear technical documentation covering designs and workflows
• Engage with stakeholders to communicate progress, risks and solutions
• Continuously evaluate new tools, frameworks and approaches to improve engineering quality

Requirements

• Strong commercial experience in software engineering, with deep expertise in Java (modern versions preferred)
• Experience building distributed, enterprise‑grade systems
• Proficiency in SQL and experience working with relational and big‑data technologies
• Hands‑on experience with commonly used databases such as PostgreSQL, HBase or Trino
• Knowledge of gRPC patterns (unary, streaming and REST mapping)
• Solid understanding of OOP design patterns, TDD and enterprise system design
• Comfortable working in Linux environments using command‑line tools
• Experience with version control and collaborative development workflows

Nice to have

• Experience with modern Java UI frameworks
• Exposure to Apache Spark, Kafka or Avro
• Cloud experience across AWS, Azure, GCP or Oracle Cloud
• Knowledge of Kubernetes and containerised environments
• Familiarity with DevOps practices and automation
• Experience with additional languages or runtimes (e.g. C#, .NET, Python, JavaScript, GraalVM)

Benefits

Initial 6-month contract, with strong possibility of extension and/or permanency.

Salary to be discussed.

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