Our client is a cybersecurity company helping organisations protect sensitive information through large-scale data collection, correlation, and real-time alerting. Their platform supports enterprise and government clients operating in high-trust environments.
Overview
Our client is building a cloud-native cybersecurity platform for large-scale data collection, correlation, and real-time alerting. Their systems process high volumes of data to deliver actionable intelligence for enterprise and government clients.
They are looking for a Senior Software Engineer (PHP) to join a small, highly technical backend team working on performance-critical, data-driven services in a security-focused environment.
Key Responsibilities
- Take ownership of requirements discovery, scope definition, and delivery planning for key projects and initiatives.
- Work closely with Product Owners and business stakeholders to take ideas from concept through to clearly defined user stories, technical approaches, and delivery estimates.
- Contribute to and help shape roadmaps and delivery plans, balancing business priorities, technical constraints, and engineering effort.
- Design, develop, and maintain backend services and REST APIs using PHP (Laravel v10).
- Own and evolve Elasticsearch implementations, including index design, mappings, query optimisation, aggregations, and performance tuning.
- Design and optimise MySQL schemas and queries for high-volume workloads, including indexing strategies and query performance analysis.
- Build and maintain data ingestion and processing pipelines from multiple internal and external sources.
- Design microservices and distributed systems supporting search, analytics, and alerting use cases.
- Deploy, monitor, and scale services using Docker, CI/CD pipelines, and AWS.
- Ensure secure coding practices and compliance with data protection and security requirements.
- Implement automated testing and maintain high standards of code quality and reliability.
- Write clear technical documentation covering APIs, data models, and system behaviour.
- Mentor junior and mid-level engineers and contribute to architectural decision-making.
Tech Stack and Tools
- Primary Backend: PHP (Laravel) – core application and API development
- Supporting Services: Java and Golang (smaller services and components), Python where appropriate
- Messaging & Streaming: Kafka (or similar)
Requirements/experience
- 5+ years of backend development experience, with strong PHP and Laravel expertise.
- Deep, hands-on experience with Elasticsearch, including index design, query optimisation, and performance tuning in production.
- Strong MySQL knowledge, including schema design, indexing strategies, and query optimisation.
- Experience building data-heavy or search-driven systems.
- Solid understanding of API design, microservices, and cloud-native architecture.
- Practical experience with Docker, cloud deployments, and CI/CD workflows.
- Strong understanding of secure coding and system hardening practices.
- Experience writing automated tests (unit and functional).
- Strong problem-solving skills and ownership mindset.
- Experience with large-scale data ingestion or cross-referencing platforms.
- Knowledge of cybersecurity, threat intelligence, or data protection domains.
- Hands-on experience with monitoring, observability, and performance profiling.
- Experience integrating analytics, AI, or LLM-powered features.
- Working knowledge of Python or Java.
- Fully remote and flexible working
- Supportive, collaborative engineering culture
- Opportunity to work on data-intensive, mission-critical systems
- Exposure to modern backend, cloud, and search technologies
- Clear opportunities for technical growth and mentorship
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