Principal Engineer

Ozone Talent; London; Hybrid; GBP 110,000 - 140,000; Full time

Benefits offered by this job

Private Health Insurance

Pension Scheme

Life Assurance Scheme with death in service benefit of 4x salary

Hybrid/Remote work

Job summary

A leading tech company in London is seeking a Principal Engineer with strong expertise in Kotlin to enhance their backend systems. You will contribute to the technology strategy and mentor junior engineers while working in a hybrid environment. The ideal candidate has experience with Spring Boot or Ktor and a solid understanding of software development principles.

Qualifications

• Strong commercial experience in the Kotlin ecosystem for backend development.
• Ability to align engineering to ambitious commercial objectives.
• Experience in line management responsibilities while remaining deeply technical.
• Experience in aligning engineering to ambitious commercial objectives.

Responsibilities

• Contribute to the businesses technology strategy and architecture.
• Ship resilient and well tested production code.
• Mentor and coach more junior members of the team.
• Collaborate with different teams to deliver value aligned to business objectives.
• Mentor and coach more junior team members.
• Continuously evolve and improve ways of working in the business.

Skills

Kotlin expertise

Spring Boot or Ktor

Secure coding practices

Software design patterns

Agile methodologies

Test-driven development

Agile methodologies

Backend architecture

API design

Job description

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This range is provided by Ozone Talent. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range

Principal Engineer

London Hybrid

We’re working with a rapidly growing tech for good company that is transforming how data, automation, and smart integrations shape the future of digital infrastructure. Their platform optimises real-time operations, connecting users with seamless, intelligent technology solutions.

We are looking for Principal Engineer with deep expertise in Kotlin to help scale and enhance their high performance systems. This is an opportunity to work with modern backend architecture, collaborating with top-tier engineers in a fast-moving, product-focused environment.

Responsibilities as a Principal Engineer:

• Contribute to the businesses technology strategy and architecture
• Contribute to the backend Kotlin infrastructure
• Ship resilient and well tested production code
• Collaborate with different teams to deliver value that aligns to business objectives
• Mentor and coach more junior members of the team
• Continuously evolve and improve the ways of working in the business

Key Requirements:

• Strong commercial experience in the Kotlin ecosystem for backend development
• Confidence to work with Spring Boot or Ktor to build robust microservices
• Strong ability to write secure, resilient, and well-tested code
• Ability to align engineering to ambitious commercial objectives
• Experience in line management responsibilities while remaining deeply technical
• Desire for building API-first products
• Deep understanding of software design patterns, SOLID principles, and test-driven development
• Experience with Agile methodologies, including peer reviews & pair programming.
• Ability to translate business needs into scalable technical solutions
• Competitive salary and bonus
• Hybrid office / remote-working practices
• Private Health Insurance
• Pension Scheme
• Life Assurance Scheme with death in service benefit of 4x salary

This is a career defining Principal Engineer position with the potential to have a massive impact on the technology strategy of a business that is directly shaping the future of intelligent digital infrastructure.

**Unfortunately, due to the high volume of applications, not all applicants will receive feedback.**

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

• Industries

  Software Development

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