Sr Backend Engineer (English, Network/cybersecurity)

Top 3 reasons to join us

• Competitive Salary & internal shares program
• Annual allowances for personal development & sport
• 20 days annual leave & 5 days sick leave

Job description

The Senior Software Engineer, GeoGuard contributes to the success of the GeoGuard team by leading the design and implementation of advanced VPN detection, proxy identification, and IP threat investigation solutions. This role combines deep technical development expertise with specialized network security knowledge to combat emerging IP spoofing threats and anonymization technologies.

Reporting directly to the Manager, Technical Product, this position develops and maintains GeoGuard's core products by architecting sophisticated detection algorithms, researching emerging VPN/proxy technologies, and implementing robust countermeasures against IP obfuscation techniques.

Key Responsibilities

Accountabilities

• Lead technical research and development of VPN/proxy detection algorithms and IP threat assessment systems
• Provide technical guidance to developers on network security, IP geolocation, and threat detection methodologies
• Research emerging VPN services, proxy networks, and IP spoofing techniques; analyze their methods and develop countermeasures
• Design and architect scalable solutions for real-time IP threat analysis and geolocation verification
• Conduct technical reviews of threat detection models and validation algorithms for customer releases
• Establish and maintain best practices for cybersecurity-focused development within the team
• Immediately escalate critical security vulnerabilities or emerging threat vectors that could impact product effectiveness

Responsibilities

VPN/Proxy Investigation & Research:

• Continuously monitor and analyze new VPN providers, proxy services, and anonymization tools
• Investigate IP allocation patterns, hosting provider behaviors, and network infrastructure changes
• Develop and maintain comprehensive databases of known VPN/proxy IP ranges and behavioral signatures
• Research emerging threats including residential proxies, mobile proxies, and distributed proxy networks
• Monitor darkweb marketplaces and security forums for emerging proxy/VPN trends
• Perform deep packet analysis and network traffic pattern recognition

Technical Development:

• Develop and maintain GeoGuard's system using PHP, Python, and/or Go
• Optimize VPN/ Proxy detection algorithms

System Architecture & Operations:

• Design scalable infrastructure to handle millions of IP lookups per day
• Implement monitoring and alerting systems for detection accuracy and system performance
• Analyze production incidents related to false positives/negatives in threat detection
• Collaborate with DevOps team on deployment of detection rule updates and model improvements

Customer & Stakeholder Support:

• Investigate customer-reported bypass attempts and develop rapid response solutions
• Provide technical expertise during customer security consultations
• Support sales engineering team with technical demonstrations and proof-of-concepts
• Document threat analysis findings and detection methodologies for internal and customer use

Industry Intelligence & Collaboration:

• Maintain relationships with cybersecurity vendors, threat intelligence providers, and ISPs
• Monitor industry threat reports, security advisories, and academic research
• Participate in cybersecurity conferences and forums to stay current with threat landscape
• Contribute to open-source security tools and research when appropriate

Your skills and experience

• 5+ years of experience with PHP and Python/Go. Experience leading technical teams is a plus
• Experience with cybersecurity is particularly valuable.
• Ability to research new technologies, deep knowledge in IP network/ CDN technologies, develop specifications, and code
• Problem solver and solutions-oriented
• Ability to multi-task and schedule, collaborate with teams and follow up with team members on actions
• Good communication skills
• Good written and spoken English skills
• Good understanding of object-oriented programming and design patterns
• Good understanding of relational databases (if applicable)
• Experience working in a multinational team
• Experience using modern version control and project management systems
• Teamwork skills
• Ability to work a flexible schedule or overtime in the event of emergencies on the project
• Striving for professional development
• Analytical skills
• Quick learner

Why you'll love working here

Our Benefits:

1. Learning opportunities & personal development allowance
2. 20 annual leave days, 5 sick leave days
3. Extensive health insurance
4. Competitive salary package, 100% salary during the probation period
5. Attractive bonuses (13th month, business performance, equity plans)
6. Annual salary performance review
7. Hybrid working mode & Modern office at a prime location in District 1
8. Free parking
9. Annual company trip & year-end party
10. Quarterly team-building activities
11. In-office snacks and drinks
12. International working environment
13. Weekly yoga classes in the office

About GeoComply

We’re GeoComply! We are at the forefront of geolocation, cybersecurity, and anti-fraud innovation, developing and delivering cutting-edge technologies to help ensure regulatory compliance, combat bad online actors, alleviate user friction, and protect businesses from fraud.

Achieving significant business and revenue growth over the past three years and dubbed a tech “Unicorn,” GeoComply has been trusted by leading global brands and regulators for over ten years. Our compliance-grade geolocation technology solutions are installed on over 400 million devices and analyze over 12 billion transactions a year.

At the heart of it all is the people, united by a deep commitment to problem-solving and revolutionizing how people and businesses use the internet to instill confidence in every online interaction. With teams across five countries, three continents, and a global customer base, we have no plans to slow down.

Now What? Send us your resume and a cover letter. We Can’t-Wait To Meet You.