Senior Java Backend Engineer—Kafka & Event-Driven Microservices

Luxoft; Hong Kong; On-site; HKD 900,000 - 1,300,000; Full time

Job summary

Luxoft is seeking a Senior Backend Engineer to design, build and operate event-driven microservices for structured-products trading. You will work across APAC, AMER and EMEA, integrating external trading platforms with internal services including FIX connectivity.

Your role emphasizes robust testing, secure operation, and production-ready observability with Java, Spring Boot and Kafka technologies. Collaboration with product, support and platform teams is essential.

Qualifications

• 6 years deep hands-on experience with modern Java, Spring Boot, dependency injection, configuration, Spring WebFlux, Project Reactor and Spring Security.
• strong knowledge of Apache Kafka, Kafka Streams, Reactor Kafka, Spring Kafka, Confluent Schema Registry, Apache Avro and schema evolution.
• a strong testing mindset using JUnit 5, Mockito, AssertJ, reactor-test, JSON comparison and Kafka test tooling, including deterministic and parameterized tests.
• experience with Maven, GitLab CI/CD and Kubernetes-based delivery; familiarity with Node and npm is beneficial.
• familiarity with Micrometer, Prometheus, Actuator, OpenTelemetry, Log4j2, Splunk integration and HashiCorp Vault (good to have).
• an understanding of structured products, RFQ and quote workflows, order routing, trade lifecycle events, pricing subscriptions and reporting is beneficial.
• experience with AI solutions, MCP servers and AI agents is a plus.
• Strong technical communication skills, a collaborative approach to code reviews, and the ability to thrive within regulated environment.

Responsibilities

• design, build and operate event-driven microservices that power structured-products negotiations and trading.
• the solution enables the routing, transformation, enrichment and exchange of communications between internal and external partners.
• design, build and test stateless Java services and shared libraries that consume, transform and produce Kafka messages.
• ensure reliable and secure operation through robust stream error handling, schema compatibility, deterministic behavior and production-ready observability.
• deliver services across multiple environments, contributing to GitLab CI/CD, Kubernetes deployments and operational support.
• write high-quality unit and integration tests, review code and promote consistent engineering standards across a broad application estate.
• integrate external trading platforms and venues with internal instrument, reference-data and product services, including FIX connectivity.

Skills

Java

Spring Boot

Spring WebFlux

Project Reactor

Spring Security

Kafka

Kafka Streams

Schema Registry / Avro

JUnit 5 / Mockito

CI/CD

Kubernetes

Maven

Node / npm

Observability (Micrometer/Prometheus/O

OpenTelemetry

HashiCorp Vault

Tools

Maven

GitLab CI/CD

Kubernetes

Node

npm

Micrometer

Prometheus

OpenTelemetry

Log4j2

Splunk integration

HashiCorp Vault

Job description

Luxoft is seeking a Senior Backend Engineer to design, build and operate event-driven microservices for structured-products trading. You will work across APAC, AMER and EMEA, integrating external trading platforms with internal services including FIX connectivity.

Your role emphasizes robust testing, secure operation, and production-ready observability with Java, Spring Boot and Kafka technologies. Collaboration with product, support and platform teams is essential.