Senior Back-End Security Engineer Java / Kotlin / Golang

Ocho People; Belfast; On-site; GBP 120,000; Full time

Job summary

A fast-growing Cloud Security Client in the United Kingdom is seeking a Senior Back-end Security Engineer with experience in Java, Kotlin, or Golang. You will own the full lifecycle of backend services and enhance architectural direction within a cloud-native environment. Responsibilities include conducting code reviews and collaborating with cross-functional teams. Benefits include a salary of up to £120k, 35 days holiday, and private pension & healthcare.

Benefits

Salary up to £120k

35 days holiday

Private pension & healthcare

Qualifications

• Experience building high-performance backend systems using Java, Kotlin, or Golang.
• Strong understanding of cloud platforms (AWS, GCP, or Azure) and modern deployment workflows.
• Proven ability to deliver production-grade services in a microservices-based architecture.
• Comfortable working in CI/CD pipelines and containerised environments.

Responsibilities

• Own the full lifecycle of backend services from design to production.
• Contribute to architectural direction and technical decision-making.
• Conduct peer design and code reviews.
• Collaborate with DevOps, frontend, and product teams.
• Continuously improve system performance and reliability.

Skills

Java

Kotlin

Golang

Cloud platforms (AWS, GCP, or Azure)

CI/CD pipelines

Containerised environments (e.g. Docker, Kubernetes)

Microservices-based architecture

Data-intensive systems

Tools

Docker

Kubernetes

Neo4j

ElasticSearch

TimescaleDB

RabbitMQ

Redis

Job description

Senior Back-end Security Engineer - Java / Kotlin / Golang

Overview

We're working with a fast-growing Cloud Security Client on the hunt for an experienced Senior Backend Engineer to join their world-class engineering team.

This is a rare opportunity to shape the architecture and scalability of a runtime-powered Cloud-Native Application Protection Platform used by global enterprise customers.

As part of a highly skilled, collaborative team, you'll work on complex backend challenges using modern Java/Kotlin in a fully cloud-native environment with exposure to cutting-edge tools and real-world security impact.

Key Responsibilities

• Own the full lifecycle of backend services, from design and development through to deployment, monitoring, and optimisation
• Contribute to architectural direction and technical decision-making across microservices
• Conduct peer design and code reviews as part of a high-trust, high-performing team
• Collaborate with DevOps, frontend, and product teams to deliver scalable and secure features
• Continuously improve system performance, reliability, and efficiency in production at scale

Essential Skills & Experience

• Experience building high-performance backend systems using Java, Kotlin, or Golang
• Strong understanding of cloud platforms (AWS, GCP, or Azure) and modern deployment workflows
• Experience working with data-intensive systems - including databases, messaging queues, and event-driven services
• Proven ability to deliver production-grade services in a microservices-based architecture
• Comfortable working in CI/CD pipelines and containerised environments (e.g. Docker, Kubernetes)
• Collaborative mindset and a strong sense of ownership and initiative

Desirable Skills

• Exposure to systems like Neo4j, ElasticSearch, TimescaleDB, RabbitMQ, Redis
• Experience working on security-focused platforms or distributed cloud infrastructure
• Familiarity with observability and monitoring tools at scale

Why Apply?

• Play a key role in one of the most exciting and fast-growing companies in cloud security
• Tackle complex engineering challenges with a talented global team
• Work with modern tech in a truly cloud-first, high-impact environment
• Competitive salary, flexibility, and the opportunity to shape product and platform direction from an early stage

What’s in it for you?

• Salary up to £120k
• 35 days holiday
• Private pension & healthcare

For more information about this opportunity, connect with Neill Ferguson on LinkedIn or submit your CV via the link below.