Senior Java Technical Lead - RESTful API, Spring Boot

HCL Technologies Limited; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

HCLTech is seeking a Senior Java Technical Lead to design, develop, and maintain high-performance microservices using Java 17 and Spring Boot in a City of London-based team. You will build reactive systems with Spring WebFlux, implement robust RESTful APIs, and drive event-driven integration with IBM MQ and Apache Kafka.

You will collaborate across cross-functional teams to ensure scalable, well-documented code and contribute to continuous improvement initiatives.

Qualifications

• Proficient in design and development of Java-based microservices using Spring Boot and Spring WebFlux.

Responsibilities

• Designing and building high-performance microservices with Java 17 and Spring Boot.
• Developing reactive, non-blocking apps with Spring WebFlux.
• Designing, developing, and securing RESTful APIs with proper versioning and error handling.
• Implementing event-driven architecture using IBM MQ and Apache Kafka.
• Collaborating with frontend, architecture, and product teams to deliver end-to-end solutions.
• Troubleshooting production issues and performing root cause analysis.

Skills

Java 17

Spring Boot

Spring WebFlux

REST APIs

Microservices

IBM MQ

Apache Kafka

MongoDB

AWS Cloud

OpenShift

Kubernetes

Helm

Harness

Git

Bitbucket

JIRA

Gradle

Lightspeed

Kibana

Tools

MongoDB

AWS

OpenShift

Kubernetes

Helm

Harness

Git

Bitbucket

JIRA

Gradle

Lightspeed

Kibana

Job description

Senior Java Technical Lead - RESTful API, Spring Boot

City Of London, England, United Kingdom

Job Summary

Designing, developing, and maintaining high-performance, scalable microservices using Java 17 and Spring Boot frameworkBuilding reactive and non-blocking applications leveraging Spring WebFlux to handle high-concurrency workloads efficientlyDeveloping and consuming RESTful APIs following industry best practices and ensuring proper documentationImplementing event-driven architecture using IBM MQ and Apache Kafka for seamless asynchronous communication between servicesCollaborating with cross-functional teams including frontend developers, architects, and product owners to deliver end-to-end solutionsWriting clean, maintainable, and well-documented code adhering to coding standards and best practices. Participating in code reviews, providing constructive feedback, and ensuring code quality across the teamTroubleshooting production issues, performing root cause analysis, and implementing effective fixesContributing to continuous improvement initiatives by identifying opportunities for optimization and automation

Key Responsibilities

• Java 17Expert-level understanding of Java 17 features including records, sealed classes, pattern matching, and enhanced switch expressions
• Spring BootStrong hands-on experience in building production-grade applications using Spring Boot
• Spring WebFluxProficiency in developing reactive, non-blocking applications using Spring WebFlux and Project Reactor
• REST APIsExpertise in designing, developing, and securing RESTful APIs with proper versioning and error handling
• MicroservicesSolid experience in microservices architecture including service discovery, API gateway, circuit breakers, and distributed tracing
• IBM MQHands-on experience with IBM MQ for enterprise messaging and integration
• Apache KafkaStrong knowledge of Kafka for building event-driven systems, including producers, consumers, and stream processing

Skill Requirements

• MongoDBExperience with MongoDB for NoSQL database design, queries, and aggregation pipelines
• AWS CloudFamiliarity with AWS services such as EC2, S3, Lambda, ECS, and RDS
• OpenShiftExperience deploying and managing applications on OpenShift or similar container platforms
• KubernetesKnowledge of Kubernetes for container orchestration, deployments, and scaling
• HelmExperience with Helm charts for Kubernetes application packaging and deployment
• HarnessFamiliarity with Harness for continuous delivery and deployment automation
• Git & BitbucketProficiency in version control using Git and collaboration via Bitbucket
• JIRAExperience using JIRA for agile project management and issue tracking
• GradleHands-on experience with Gradle for build automation and dependency management
• LightspeedFamiliarity with Lightspeed for development acceleration
• KibanaExperience with Kibana for log visualization, monitoring, and troubleshooting

Why HCLTech?

At HCLTech, you'll supercharge your potential. You'll find your career. And you'll find your spark. All at a place that knows that helping its customers stay on top starts by putting its people first.

HCLTech is a global technology company, home to more than 223,000 people across 60 countries, delivering industry-leading capabilities centered around digital, engineering, cloud and AI, powered by a broad portfolio of technology services and products. We work with clients across all major verticals, providing industry solutions for Financial Services, Manufacturing, Life Sciences and Healthcare, Technology and Services, Telecom and Media, Retail and CPG, and Public Services. Consolidated revenues as of 12 months ending June 2026totaled $14.8billion.