Principal Software Engineer

• As a Principal Software Engineer, you’ll play a key role in delivering complex, scalable systems for ambitious clients. This is a hands-on engineering role where you’ll work across the full stack—backend services, APIs, frontend components, data pipelines, and cloud infrastructure
• You’ll collaborate closely with our internal engineering teams and client stakeholders, influencing technical direction while remaining deeply involved in design and delivery
• Design and build backend services for a highly scalable marketing platform
• Own the design of APIs, applications, and supporting infrastructure
• Document technical designs and requirements clearly for both internal teams and clients
• Deliver solutions end-to-end: build, automate, deploy, operate, and support
• Partner with clients and delivery teams to translate business requirements into robust technical solutions
• Work within an Agile, iterative delivery model
• Collaborate in a hybrid setup with both remote and in-person team members and stakeholders
• You’ll join a high-performing engineering team working on a large-scale machine learning platform for a global telecommunications client
• The team operates with a high degree of autonomy and shared ownership. Engineers work across the full stack, support one another’s growth, and collaborate closely with data scientists and adjacent teams to design cross-system solutions
• Strong engineering culture, real influence, and meaningful problems to solve

Benefits

• Employee assistance programme
• Generous parental leave: Three months’ fully paid primary carer leave and one month fully paid secondary carer leave, subject to a minimum 12 month tenure
• Flexible working: Want to work from home or leave early to pick up the kids? Need to start early some days, later on others? No problem!
• “Your day”: One day per year, in addition to annual leave days that you can take off with no explanation required
• Upskill - Learning and development: We all love continually learning and have a generous budget for you to upskill, join conferences, get certified and qualified

• This role suits someone who enjoys solving hard problems, owning outcomes end-to-end, and operating in a consultative engineering environment
• Background working on large-scale web services
• Experience designing and implementing data-driven APIs
• Solid SQL experience, including schema design and performance-aware queries
• Strong foundation in JVM-based development (Kotlin preferred, Java welcome)
• Deep experience with automated testing (unit, integration; TDD/BDD preferred)
• Experience with React, TypeScript, Redux, and Tailwind (or similar modern frameworks)
• Containerised deployments using Docker, ECS, Kubernetes, or equivalent
• Experience with AWS, GCP, Azure, or similar
• Infrastructure-as-code (Terraform, CloudFormation, etc.)
• Exposure to Scala or functional programming concepts
• Experience with asynchronous and highly concurrent backend frameworks (e.g. Ktor, http4k, Play, RxJava)
• NoSQL experience (DynamoDB, Cassandra, BigTable, Cosmos DB, etc.)
• Strong Git workflow experience and the ability to adapt workflows to project needs
• A genuine appetite for learning and adopting new technologies quickly