Senior Backend Engineer (B2B SaaS) – Sophia Antipolis

About usiLex is a rapidly growing next-gen B2B SaaS fintech start-up headquartered in Singapore, with operations in Hong Kong, London, and Sophia Antipolis. iLex integrates on a single platform access to global loan markets and a large network of investors, primary and secondary deal sites, advanced investor intelligence and market analytics for banks, debt advisors and institutional lenders.iLex’s vision is to drive liquidity, efficiency, transparency, and security in loan capital markets. In collaboration with the industry, iLex builds cutting-edge solutions across the loan value chain to create more resilient and efficient loan markets. By doing so, we actively contribute to providing better access to financing opportunities for all businesses and projects, advancing global growth and progress.About the roleWe are looking for a Senior Backend Engineer to join our team in Sophia Antipolis. As a integral member of the Engineering team and working closely with the Product and Frontend teams, you’ll be responsible for designing, improving, and maintaining our backend architecture and the codebase.Our stackCore: Java 21, Spring Boot 3 (WebMVC/WebFlux, Validation, Security, OAuth2 Resource Server), RESTful APIs, microservicesData: PostgreSQL, Redis, jOOQ, LiquibaseMessaging & Auth: Apache Kafka, Keycloak (OIDC/OAuth2)Build & Infra: Maven, Docker, Kubernetes, AWS (EKS, S3, SQS, SES, Secrets Manager), JibObservability: Micrometer + OpenTelemetry (OTLP), Actuator, structured logging (Logstash)Tooling: Testcontainers, Springdoc OpenAPIYou will:Design, build and maintain scalable backend services for the iLex electronic market & trading platformDesign and optimize database schemas, queries, and data access patternsContribute to all phases of product developmentPerform code analysis, troubleshooting, improvement and bug fixingBuild event-driven architectures using KafkaImplement comprehensive monitoring, logging, and observability solutionsEnsure system security, compliance, and data integrity across all servicesCollaborate with frontend engineers to design efficient API contractsParticipate in code reviews, architectural decisions, and system design discussionsProvide L2/L3 application support for the iLex platform hosted on AWSWhat we look for:Must haves:6+ years of backend development experience with Java (Java 17+ preferred)Strong experience with Spring Boot and Spring ecosystem (Spring Data, Spring Security, etc.)Hands-on experience with:o  RESTful API design and implementationo  Relational databases (PostgreSQL) and SQL optimizationo  Build tools (Maven or Gradle)o  Git/GitHub workflows and modern CI/CD practicesExperience building and operating microservices and distributed systemsUnderstanding of containerization (Docker) and orchestration conceptsKnowledge of authentication and authorization mechanisms (JWT, OAuth2)Experience with message brokers (Kafka, RabbitMQ, or similar)Strong problem-solving skills and attention to detailProactive and autonomous, with the ability to take ownership and drive solutions end-to-endNice to have:Experience with Quarkus or other cloud-native frameworksBackground in financial services or trading systemsKnowledge of Jakarta EEHands-on experience with Kubernetes and cloud platforms (AWS preferred)Familiarity with event sourcing and CQRS patternsExperience with Keycloak or similar identity management systemsExperience with database migration tools (Liquibase, Flyway)Skills in performance optimization and profilingExperience with monitoring/observability tools (Prometheus, Grafana, ELK stack)Familiarity with DevOps practices and infrastructure as codeWho you areWe are a lean team and as we continue to grow, maintaining our company culture and living by our values is key, so it’s important to us that you display:Transparency – effectively communicate in good times and bad timesSimplicity – be focused and straightforwardImpact – spend time where it matters to get resultsCommitment – take initiative, do what you say, and stick with the journeyChallenge – be curious and take feedback to continuously improveGoodwill – appreciate your team and colleaguesYou should also be keen on working in a fast paced, quickly scaling, start-up environment. If you are motivated and results-focused, we’d like to meet you.What we offerCompetitive salaryFlexible leave structureFlexible working arrangements so you can work from office, from home and from anywhereAnnual allowance for health & wellbeing including access to corporate medical and dental insurance planAnnual allowance for learning & developmentGreat career development in a fast-paced environmentRegular company social eventsBeing part of a team of seasoned professionals providing revolutionary solutions to the marketBeing part of a fintech pioneer with opportunities to grow with us in APAC, EMEA and beyondiLex is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.