Senior Scala Engineer

mthree; Greater London; On-site; GBP 110,000 - 150,000; Full time

Benefits offered by this job

Competitive salary and benefits

Job summary

mthree seeks an engineering leader to scale a strategic Post Trade Data Platform for a tier-one global bank. You will drive architecture and strategy, mentor teams, and deliver resilient data solutions across London, New York, and India.

You will work within a cross-functional engineering and architecture group, owning code quality and platform capabilities while guiding modern software design and agile practices in a high-performance environment.

Qualifications

• Expertise in JVM languages (Scala/Java) and performance tuning.
• Experience with large-scale data platforms and databases.
• Strong cloud/DevOps knowledge (Linux, OpenShift/Kubernetes, Ansible).
• Practical experience with reactive, event-sourced architectures and Spark/Flink.

Responsibilities

• Build the Strategic Platform and scale ingestion and resilience.
• Own architecture and strategy to support Operations and the business.
• Provide technical leadership via design reviews and coding standards.
• Mentor engineers and drive continuous platform improvement.

Skills

Scala/Java JVM

Data platforms (Oracle Exadata, Mongo,

OpenShift/Kubernetes

Apache Spark

Apache Flink

APIs & data formats (REST, Protobuf,Av

Iceberg/Databricks/Hadoop

CI/CD (Jenkins/Gradle)

Scrum/Agile

Job description

A tier-one global investment bank is scaling its strategic Post Trade Data Platform across Global Markets, with upcoming initiatives set to grow the platform to 10x current ingestion volumes while raising the bar on data accessibility, usability, resilience and quality.

You will join a horizontal Engineering and Architecture team spanning London, New York and India, sitting at the centre of a major transformation programme that underpins operational intelligence, advanced analytics and next-generation AI-driven use cases.

Key Responsibilities

• Build the Strategic Platform: Engineer innovative, scalable and resilient solutions that advance the core data platform.
• Own Architecture & Strategy: Define and drive the technical direction needed to support the future needs of Operations and the business.
• Lead Through Craft: Provide technical leadership via architecture, design, and code/PR reviews, championing high standards of code quality and engineering excellence.
• Mentor & Improve: Mentor engineers and drive continuous improvement in platform capabilities, development practices, and operational effectiveness.

Required Skills

• Core Technical Stack: Deep expertise in Scala, Java, or another JVM language, including performance optimisation and tuning.
• Data Platforms: Strong experience with database technologies including Oracle Exadata at scale, MongoDB, Elasticsearch, or similar.
• Cloud & DevOps: Solid knowledge of Linux/Unix, OpenShift/Kubernetes, and Ansible.
• Distributed Systems: Experience building and supporting reactive, event-sourced systems, with hands-on Apache Spark and Apache Flink.
• APIs & Data Formats: Strong understanding of Apache HTTP, Envoy, and REST API design, plus experience with Protobuf, Avro, and Parquet.
• Knowledge of Iceberg, Databricks, and Hadoop ecosystems.
• TDD, ATDD, and Clean Coding practices within a CI/CD environment (e.g. Jenkins, Gradle).
• Experience with Scrum/Agile methods and modern software design patterns.

The mthree Model

Operating from Bromley, you will join mthree as a permanent, salaried consultant deployed exclusively to this leading investment bank. You'll receive a competitive salary and benefits package, dedicated professional support, and a transparent, contractually defined pathway to transition directly into the client's permanent headcount.