Senior Backend Software Engineer

At Semperis, our mission is to be a Force for Good. Starting with being a great place to work. We believe that when people feel valued, supported, and empowered, they do their best work. That’s why we focus on creating an employee experience rooted in purpose, growth, and balance. Semperis has been recognized as one of America’s Fastest-Growing Cybersecurity Companies by the Inc. 5000, a DUNS 100 Top Startup to Work For, and a multi-year Inc. Best Workplace awardee. About The Role We are seeking an exceptional Senior Backend Engineer to join our Platform Group team in Dublin, Ireland. You will architect and develop shared infrastructure components that power Semperis's enterprise security and identity products. This is a highly collaborative role requiring both technical excellence and strong cross-functional partnership skills. product engineers, DevOps, and architects to define platform capabilities and technical standards What You'll Do As a Senior Backend Engineer on our Core Platform team, you will: Design and build shared platform components used across multiple product teams, ensuring scalability, reliability, and maintainabilityArchitect distributed systems using microservices and event-driven patterns that support enterprise-scale workloadsOwn critical backend services from conception through deployment, including code quality, performance optimization, and operational excellenceCollaborate extensively with architects, team leads and other stakeholders.Mentor junior engineers through code reviews, pair programming, and technical guidanceDrive technical initiatives that improve developer productivity, system observability, and platform resilienceContribute to architectural decisions and establish best practices for backend development across the organizationAnalyze system performance and data patterns to identify optimization opportunities and inform future platform investments What You Bring Required Qualifications 7+ years of professional software engineering experience, with strong expertise in backend developmentDeep proficiency in C# and .NET Core, including modern framework features and performance optimizationProduction experience with Kubernetes and container orchestration in cloud environments (Azure/AWS/GCP preferred)Proven track record designing and implementing microservices architectures and event-driven systems at scaleExperience developing shared libraries, frameworks, or platform components consumed by multiple teamsDemonstrated ability building enterprise SaaS applications serving high-volume, multi-tenant environmentsStrong collaborative mindset with excellent communication skills and experience working across teams to drive consensusBachelor's degree in Computer Science or equivalent practical experienceTechnical leadership experience, including mentoring engineers and leading technical initiativesFluency in English (written and verbal) Preferred Qualifications Experience in the Enterprise Identity and Access Management (IAM) domainHands-on expertise with Kafka, RabbitMQ, or similar message brokersKnowledge of ElasticSearch or other distributed search/analytics platformsOpen-source contributions or experience maintaining shared component librariesExperience with observability tools (Prometheus, Grafana, distributed tracing)Background in API design and governance for platform servicesFamiliarity with CI/CD pipelines and infrastructure-as-code practices Why Join Semperis? You’ll be part of a global team on the front lines of cybersecurity innovation. At Semperis, we celebrate curiosity, integrity, and people who take initiative. If you’re someone who sees the glass as half full, embraces challenges as growth opportunities, and values a healthy balance between work and life—we’d love to meet you. Semperis maintains office locations in several cities across the globe. Where the job description specifies a required location, candidates will follow our hybrid work model. This includes working up to three days per week and remotely the remaining days. Semperis is an equal opportunity employer and will not discriminate against an applicant or employee based on race, color, religion, creed, national origin or ancestry, ethnicity, sex (including gender, pregnancy, sexual orientation, and gender identity), age, physical or mental disability, veteran or military status, genetic information, citizenship, marital status, or any other legally recognized protected basis under federal, state, or local law. The information collected by the Semperis application is solely to determine suitability for employment, verify identity, and maintain employment statistics. Applicants with disabilities may be entitled to reasonable accommodation under the Americans with Disabilities Act and/or other applicable state or local laws. A reasonable accommodation is a change in the way things are normally done which will ensure an equal employment opportunity without imposing undue hardship on Semperis. Please inform Semperis representative Anna Taylor, Director of Global Recruiting, if you need assistance completing this application or to otherwise participate in the application process.