Senior Software Engineer - Payment (80-100%)

TWINT AG is hiring a Senior Software Engineer for payment systems in Zurich. The role involves building reliable payment features, mentoring teammates, and improving system performance using tools like Datadog and Kubernetes.

This position focuses on the end-to-end technical ownership of new payment features, guiding them from initial concept through implementation to live operation. The engineer ensures a seamless and dependable payment experience for millions of Swiss users while continuously refining the underlying architecture.

Responsibilities

• Design and build payment features to guarantee a reliable experience for millions of users across Switzerland.
• Take full technical responsibility for new features, managing their lifecycle from initial design to production operation.
• Support team members during sprint cycles and drive ongoing team improvements.
• Maintain high code quality through rigorous reviews and a focus on clean, maintainable code.
• Diagnose complex technical problems, manage incidents with internal and external partners, and create long-term solutions.
• Champion a strong test automation culture within the engineering group.
• Enhance system performance and observability by leveraging tools such as Datadog, Kibana, and Grafana.
• Help evolve the technology stack and architecture, prioritizing performance, reliability, and scalability.

Requirements

• A university or university of applied sciences degree in a technical field, or equivalent education.
• Several years of hands-on software engineering experience in complex business and technical environments.
• Deep expertise in Java, Spring Boot, Gradle, Git, and GitHub Actions.
• Solid background with Hibernate, RESTful APIs, SQL, Kafka, Docker, and Kubernetes.
• Experience in application performance monitoring, log analysis, and implementing performance optimizations.
• Willingness to participate in on-call rotations and standby duties for special assignments.
• Strong grasp of agile methodologies and DevSecOps principles.
• Proficiency in automated testing across multiple levels, Test-Driven Development, and frameworks like JUnit.
• Fluent English communication skills.

Nice to have

• Prior experience handling credit card payment processing.
• German language proficiency.

What the company offers

• Professional growth through challenging projects and extensive training opportunities in an innovative tech environment.
• Six weeks of vacation, flexible working hours, and the ability to work remotely.
• Enhanced family benefits, including increased allowances and extended parental leave.
• A supportive, healthy work culture with regular team-building events.
• Competitive compensation and a commitment to fair pay practices, plus additional perks.
• Office locations in central Zurich and Bern with easy public transport access.

About the company

TWINT AG fosters a collegial and healthy work environment where collaboration is strengthened through regular team events. The company prioritizes a positive atmosphere and supports work-life balance with flexible arrangements and family-friendly policies.

• A collegial and healthy work culture supported by regular team-building events.
• Flexible working hours and remote work options to support work-life balance.
• Enhanced family allowances and extended parental leave.
• Competitive compensation and a commitment to fair pay practices.