Sardine seeks a senior backend Software Engineer based in India to design, construct, and maintain scalable APIs and backend services, collaborate with product and engineering teams, and contribute to technical roadmaps and documentation. The role expects 7+ years of web backend experience, strong production delivery, proficiency in English, Golang experience preferred, and familiarity with data engineering, fraud prevention, or fintech domains.

Senior Software Engineer (Frontend) responsible for designing and delivering polished, performant React + TypeScript interfaces, mentoring engineers, and setting frontend technical direction. Role requires 7+ years experience, fluent use of AI/agentic development tools, and the ability to work with Go for backend services. Remote-first within the United States; candidates must reside in the Eastern Time Zone.

Sardine is hiring a Senior Software Engineer, Frontend to design and deliver polished, accessible, and performant user-facing experiences using React and TypeScript. The role involves setting frontend technical direction, mentoring engineers, using AI/agentic development tools, and occasionally working in Go on backend services. Requires 7+ years of software engineering experience, strong React/TypeScript expertise, leadership experience, and proficiency in English. Position is remote within Canada (Ontario) and works in Eastern Time.

Serve as technical steward and platform architect for fraud engineering teams: design and optimize ultra-low-latency backend services and a high-throughput rules engine, define data access patterns and partitioning, build real-time pipelines for feature computation, and mentor senior engineers. Requires 7+ years of software engineering experience and hands-on expertise with distributed systems, stream processing (e.g., Kafka, Flink, SQS, Pub/Sub), and polyglot persistence.

Remote-first Senior Backend Engineer role (must reside in specified cities in Brazil). Responsible for designing, building, and maintaining robust backend services and APIs, contributing to data pipelines and internal tooling, collaborating with product and engineering teams, and producing technical documentation. Requires 7+ years of web backend experience; proficiency in English; Golang is a significant advantage; data engineering and fraud/fintech domain experience are desirable.

Sardine seeks a Machine Learning Engineer to own model serving, real-time inference, feature retrieval, and deployment pipelines for fraud detection under a sub-250ms latency budget. The role requires production ownership (monitoring, drift detection, retraining, incident response, on-call), strong Python and solid software engineering practices, experience with Kubernetes/containers and a major cloud (primarily GCP), and working across Python and Go. Remote within the United States or Canada.