Senior Software Engineer - Budapest
Role Overview
This senior-level role involves designing, developing, and maintaining backend services for usage metering and billing systems at Kong. You'll work on microservices and APIs that process millions of events per second, collaborating with Product and Engineering teams to deliver scalable, customer-focused solutions. The position requires optimizing database performance, ensuring data integrity, and supporting production services through monitoring and on-call rotations.
Perks & Benefits
The job is fully remote, offering flexibility in location, with likely expectations for collaboration across time zones. It includes opportunities for career growth through work on scalable, cloud-native systems and exposure to modern technologies like Kubernetes and Docker. The culture emphasizes innovation, with a focus on developer productivity and secure AI adoption, and may involve contributions to open-source projects.
Full Job Description
Are you ready to power the World's connections?
If you don’t think you meet all of the criteria below but are still interested in the job, please apply. Nobody checks every box - we’re looking for candidates that are particularly strong in a few areas, and have some interest and capabilities in others.
About the role
On the Konnect Monetization & Billing team at Kong, you will design, develop, and maintain the core backend services that power our usage metering and billing systems. As a Backend Engineer, you’ll work closely with Engineering and Product teams to build scalable services and APIs that process millions of events per second, driving measurable impact for our customers.
What you’ll do
Design, implement, and maintain microservices and APIs that enable usage metering, billing, invoicing, and analytics at scale.
Architect backend systems capable of processing millions of events per second in real-time.
Collaborate with Product and Engineering teams to define system requirements and deliver high-quality, customer-focused solutions.
Optimize database performance and ensure data integrity, reliability, and security across distributed systems.
Integrate with third-party services (e.g., Stripe, CRMs) to support billing and reporting needs.
Support production services through monitoring, troubleshooting, and on-call rotation to ensure high availability.
Implement best practices for DevOps, CI/CD, and cloud-native development.
Write automated tests to validate system behavior and prevent regressions.
And any additional tasks required by your manager.
What you’ll bring
5+ years of professional software development experience.
Proven experience building scalable backend services.
Demonstrated ability to deliver and maintain production systems at scale.
Solid understanding of distributed systems, APIs, and database optimization.
Excellent verbal and written communication skills.
Bonus points
Experience with Go.
Contributions to Open Source projects.
Familiarity with Cloud Native technologies (e.g., Kubernetes, Docker).
Exposure to big data systems (e.g., ClickHouse), streaming platforms (e.g., Kafka), and event-driven architectures.
Experience on working on developer focused products.
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About Kong:
Kong Inc., a leading developer of cloud API technologies, is on a mission to enable companies around the world to become “API-first” and securely accelerate AI adoption. Kong helps organizations globally — from startups to Fortune 500 enterprises — unleash developer productivity, build securely, and accelerate time to market. For more information about Kong, please visit www.konghq.com or follow us on X @thekonginc.
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