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# Sr. Software Engineer

- **Company:** Proofpoint
- **Location:** Belfast, United Kingdom
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Microsoft Windows, Artificial Intelligence, Microsoft Online Services, Software as a Service, Computer Programming, Databases, Relational Databases, Software Debugging, Distributed Systems, Python (Programming Language), PostgreSQL, Performance Tuning, Query Optimization, Software Tools, Cloud Services, Software Engineering, Systems Integration, TypeScript, ReactJS, Backend, Information Technology, Apache Kafka, Gsuite, Front End Software Development, Video Streaming, Amazon Simple Queue Service (SQS)
- **Published:** October 23, 2026
- **Apply:** https://dejobs.org/x/x/28C01FBEF796496FA8CDA0458B63BC6B/job/

## About the Role

* Excellent programming skills in Java and/or Python, with a demonstrated ability to design, implement, and maintain large-scale production systems
 * Experience building and operating large-scale, multi-tenant SaaS platforms.
 * Experience designing scalable distributed systems that process high volumes of events, messages, or transactions
 * Experience designing scalable processing frameworks that support parallel execution, tenant isolation, and fair resource utilization
 * Experience working with PostgreSQL or other relational databases, including query optimization, performance tuning, and database scalability
 * Demonstrated ability to effectively leverage AI-assisted engineering tools as a force multiplier for software design, implementation, testing, debugging, and operational support
 * Strong analytical, problem-solving, communication, and collaboration skills.
 * BSc degree in Computer Science, Engineering, or equivalent practical experience

Preferred Qualifications

 * Experience with AWS cloud services and modern cloud application architectures
 * Experience with messaging and streaming technologies such as Kafka, SQS, or similar platforms
 * Experience optimizing application efficiency, system throughput, and resource utilization in large-scale production environments
 * Experience integrating with Microsoft 365, Microsoft Graph, Google Workspace, or other enterprise SaaS platforms
 * Experience with modern frontend technologies such as React or TypeScript.

## Description

Proofpoint is looking for a highly motivated Sr. Software Engineer to join the Threat Response product engineering team. This role focuses on designing distributed systems, solving scalability challenges, and building high-performance backend services operating at scale.