Senior Software Engineer - Threat Protection

Mimecast; London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A technology company in London is seeking a Senior Software Engineer to focus on Threat Protection. This role involves delivering AWS-based Java services, refactoring monolithic applications, and mentoring junior engineers. Candidates should have expertise in Java 11+, AWS services, and CI/CD. This position offers hybrid working flexibility and an engaging team environment.

Benefits

Comprehensive benefits package

Formal learning opportunities

Flexible hybrid working model

Qualifications

• Demonstrable expertise in Java 11 and above.
• Proven experience in backend system development within AWS.
• Hands-on experience with AWS services like ALB, S3, ElastiCache.

Responsibilities

• Deliver AWS based Java services through CI/CD.
• Refactor monolithic applications into a microservices architecture.
• Provide support during critical production incidents.

Skills

Java development

AWS services

Microservices architecture

CI/CD pipelines

Agile methodologies

Kubernetes

Tools

Terraform

Jenkins

Job description

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Senior Software Engineer - Threat Protection, London

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Client:

Mimecast

Location:

London, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Reference:

20cd32a508fc

Job Views:

18

Posted:

12.08.2025

Expiry Date:

26.09.2025

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Job Description:

Senior Software Engineers – Threat Protection

The driving force behind the scanning platform at Mimecast

Why Join Our Team?

Responsibilities

• Experience in a complex, multi-disciplinary environment, delivering products within specific time-scales and engaging with multiple senior stakeholders
• Deliver AWS based Java services through CI/CD and Infrastructure as code using Terraform
• Deploy, Monitor and analyze AWS usage, providing recommendations for cost optimisations without compromising system performance and reliability
• Refactor monolithic applications into a microservices/k8s architecture
• Provide support during critical production incidents and implement preventive measures
• Adhere to coding standards within the team and ensuring consistency with company-wide technology adoptions
• Adhere to comprehensive technical documentation for architectures, processes, and procedures
• Take part in backlog grooming, planning, design reviews and code reviews
• Guide other engineers, fostering a culture of collaboration, continuous learning, and professional growth
• Be an effective team player through collaboration, problem solving, and teamwork

Experience

• Demonstratable expertise in Java development, with a strong command of Java 11 and above
• Proven experience in designing, developing, and optimizing backend systems for data processing at scale within AWS
• Hands-on experience with AWS services, such as; ALB, S3, ElastiCache, IAM, CloudWatch, DynamoDb, EKS
• Knowledge and experience on Kubernetes is advantageous
• Experience with high concurrency applications, multithreading, low-latency, servers architectures
• Hands-on experience with Jenkins and establishing robust CI/CD pipelines
• Experience in Agile environment using approaches such as Scrum
• Experience in both relational and NoSQL databases, with an understanding of database design, optimization, and management
• Experience in Infrastructure as Code (IaC) tools, such as Terraform or AWS CloudFormation
• Experience in programming languages like python is advantageous

What We Bring

Join our Gateway Security team to accelerate your career journey, working with cutting-edge technologies and contributing to projects that have real customer impact. You will be immersed in a dynamic environment that recognizes and celebrates your achievements.

Mimecast offers formal and on the job learning opportunities, maintains a comprehensive benefits package that helps our employees and their family members to sustain a healthy lifestyle, and importantly - working in cross functional teams to build your knowledge!

Our Hybrid Model: We provide you with the flexibility to live balanced, healthy lives through our hybrid working model that champions both collaborative teamwork and individual flexibility. Employees are expected to come to the office at least two days per week, because working together in person:

• Fosters a culture of collaboration, communication, performance and learning
• Drives innovation and creativity within and between teams
• Introduces employees to priorities outside of their immediate realm
• Ensures important interpersonal relationships and connections with one another and our community!