Backend Technical Lead (Java, Golang, NextJS, API)

Job OverviewWe are an emerging securities firm in Vietnam building next-generation platforms for trading, customer management, and digital services. We are seeking a Backend Technical Lead with deep expertise in distributed systems, microservices, and high-throughput transaction processing to join our core engineering team.You will be responsible for designing and leading the development of scalable backend systems that handle hundreds of thousands of transactions per day, with a strong focus on performance, resilience, and scalability. This role combines hands-on technical leadership, architectural ownership, and team mentorship.Key ResponsibilitiesLead and mentor a backend engineering team working with Go, Java, JavaScript; Database with SQL and non-SQL. Own the architecture and implementation of microservices-based systems, leveraging event-driven architecture using Kafka. Design and implement workflow automation using technologies such as Temporal or Camunda to model complex business processes. Integrate and manage IAM system using KeyCloak for secure, centralized user management across services. Ensure system scalability, availability, and observability, particularly for systems handling 500,000 transactions/day.Ensure system efficiency through well-balanced orchestration of synchronous and asynchronous workflows, enabling scalable rule-based processing and robust business operations.Collaborate with BA, QC, DevOps, and other teams to ensure high code quality and alignment with business goals.Establish technical best practices, code standards, and review processes for the team.Participate in roadmap planning, system audits, and continuous improvement of platform infrastructure.