Senior Software Engineer (Java/Kotlin)

What you will be doing: 

At ComplyAdvantage, we’re building cutting-edge technology to stop money from ending up in the hands of criminals. Our mission is to reveal the truth for a safer world, and our platform helps thousands of organizations detect and prevent financial crime in real time.
We’re looking for Senior Software Engineers who want to work on high-scale, distributed systems and solve complex data and architecture challenges - all in service of a mission that matters.

As a Senior software Engineer, you’ll play a critical role in designing, building, and scaling our cloud-native services. You’ll work closely with cross-functional teams, including ML engineers, data scientists, to power key features of our platform:

• Build and maintain backend services that process and enrich massive volumes of data - extracting signals from media sources, applying machine learning models, and merging insights with structured datasets.
• Join a cross-functional squad and help drive backend architecture decisions as we continue to evolve and scale our systems.
• Design APIs and backend services that are robust, secure, and performant under load.
• Implement event-driven workflows using Kafka, and manage distributed processing pipelines.
• Ensure code quality through tests, code reviews, observability best practices, and DevOps ownership.
• Take technical ownership and contribute to mentoring less experienced engineers in the team.

Our Tech Stack:

• Cloud-Based Infrastructure: Fully cloud-based with a Kubernetes-focused tech stack. Compute workloads run in Kubernetes clusters across multiple regions.
• Development is organised around Kotlin and Python for our backend languages and TypeScript/ES6+React for our frontend stack
• We make substantial use of relational database technologies, notably Postgres, Yugabyte
• We use an event-sourced model powered by Kafka for our communication bus and gRPC for our intra-service communication protocol
• We use modern observability solutions from Grafana Cloud, we build with GitLab tooling and deploy our code using ArgoCD

About you:

We're looking for experienced backend engineers who:

• Have 5+ years of experience building backend systems in Kotlin or Java
  
• Understand modern backend architecture: microservices, APIs, event sourcing
• Have hands-on experience with distributed systems or large-scale data processing
• Have deployed and maintained production systems on cloud platforms (AWS or GCP)
• Know how to write clean, testable, well-documented code — and care about doing it right
• Are comfortable with CI/CD, containerisation, and observability tools
• Can mentor teammates, lead by example, and thrive in collaborative environments

Nice to haves

• Experience working in cross-disciplinary teams with ML engineers or SREs
• Familiarity with infrastructure-as-code, security best practices, or SRE practices
• Exposure to agile development, pair programming, and continuous delivery

Education:

• BSc/BA degree in computer science, engineering or related discipline OR relevant years of experience in required skills.

What’s in it for you? 

• Equity as we want you to have a part of what we are building 
• Private medical insurance designed to keep you ensuring peace of mind while you excel in your career.
• Unlimited Time Off Policy- A work-life balance and focus on our well-being are critical to keeping us performing at our best 
• We embrace a hybrid approach that requires employees to be in the office for two days a week. We strongly believe that this approach fosters collaboration and enables the building of meaningful relationships
• You will also get a new starter budget to kit out your home office 
• Opportunity to work on innovative projects with smart-minded people keen to share their knowledge and continuously improve 
• Annual learning budget (prorated based on start date) to drive your performance and career development.