Cyber Security Engineer - Email

Are you someone who can spot patterns others miss? Do you know what Regex and pattern matching means?

We’re looking for a highly analytical Cyber Security Engineer - Email with strong expertise in regular expressions (PCRE, RE2, Hyperscan or similar) to help us detect, prevent, and respond to evolving abuse across large-scale platforms.

While this role sits within email security, we’re open to talent from any industry—as long as you’ve applied regex and pattern-matching to solve real-world problems at scale.

The Role

You’ll play a critical role in protecting our platform from spam, phishing, malware, and emerging abuse vectors. This is a hands-on, operational role where you’ll design and optimise detection logic, monitor live systems, and continuously adapt to new threats. Working closely with technical teams, you’ll help ensure a secure, high-quality experience for end users while contributing to ongoing improvements in our anti-abuse capabilities.

What You’ll Be Doing

• Work closely with the Team Lead, Email Specialists to ensure Atmail lives up to its promise to customers with respect to providing a secure email service.
• You will be instrumental monitoring systems for False Positives, False Negatives and adjusting rules to compensate for the changing attacks.
• Provide guidance, resolve technical issues, and facilitate technical communication to assist Atmail’s customer support staff to improve the customer experience.
• Work closely with other members of the Email Specialists team when new anti-abuse features are needed or being implemented
• As part of the Email Specialists team, engage and contribute to the formation of operational plans and be a contributing member in the decision-making processes to drive our technology forwards.
• Provide technical guidance and facilitate technical communication between stakeholders to improve the product, service and customer experience.

What We’re Looking For

• Strong, hands-on experience with regular expressions (PCRE, RE2, Hyperscan or similar)
• Experience building or tuning pattern-matching, filtering, or detection systems
• Proven ability to analyse large datasets/logs to identify anomalies or threats
• Comfortable working in Linux/UNIX environments using command-line tools
• Strong problem-solving mindset and ability to work autonomously in a remote setup
• Excellent communication and collaboration skills

Essential Experience

• Experience in anti-abuse, messaging security, or large-scale operational environments
• Background in creating and tuning filtering or rule-based systems
• Strong understanding of log analysis and signal-based detection
• Familiarity with:
• Filtering tools (e.g. Rspamd, SpamAssassin)
• Blocklists/reputation systems (e.g. Spamhaus, Abusix)
• Proficient with standards such as SMTP, DNS, SPF, DKIM, DMARC
• Minimum 10+ years professional experience, , including at least 5 years in hands-on anti-abuse, messaging security, or large-scale email operations role
• A Bachelor (or higher) degree in a technology field, or equivalent experience

Nice to Have

• Scripting experience (Python, Bash, Go, etc.)
• Cloud experience (AWS or similar)
• Email infrastructure or server configuration experience
• Background in trust & safety or abuse prevention teams
• Experience working in distributed/global teams

Why Join Us?

• Fully remote with flexibility across APAC
• Work on real-time, large-scale detection challenges
• High-impact role protecting users from evolving threats
• Collaborative, technical environment focused on innovation
• Strong emphasis on work-life balance and autonomy

Who This Role Suits

You might come from:

• Email infrastructure or deliverability
• Cybersecurity / SOC / threat detection
• Data engineering / log analysis
• Fraud, risk, or abuse detection
• Any role where you’ve built pattern recognition systems using regex

If you’ve used regex to solve complex, real-world problems at scale, we want to hear from you.