Back End Developer

HCL is a $11 billion leading global technology enterprise consisting of over 200,000 professionals operating from 52 countries. Founded in 1976, HCL is one of India's original IT garage start-ups. For more on HCL, please visit www.hcl.com

Job Title: Senior Java Backend Developer

Experience: 10 Years

Work Location: Edinburgh, UK

Employment Type: Full-time

Hybrid- 2 days onsite and 3 days remote

Job Description:

Mandatory Skills & Experience

• Java 17: Functional programming features, records, sealed classes, performance considerations.
• Spring Boot: Auto-configuration, profiles, Spring Data/JPA, WebFlux (nice), validation, actuator.
• SQL & RDBMS: Schema design, indexes, query optimization, transactions, isolation levels.
• Apache Kafka: Topic design, partitioning strategy, consumer groups, offsets, retries/DLQ, schema registry/Avro/Protobuf.
• GCP: Familiarity with Cloud Run or GKE, Cloud SQL, Cloud Storage, Secret Manager, IAM, VPC; cost/perf trade-offs.
• DevOps Tooling: Git, CI/CD (Jenkins/GitHub Actions/GitLab), Docker; Kubernetes fundamentals; IaC awareness.
• Software Engineering Fundamentals: DDD concepts, SOLID, testing (unit/integration), performance profiling, and security basics (OAuth2/JWT, OWASP Top 10).

Non-Mandatory (Nice-to-Have)

• MongoDB (schema design, indexes, aggregation).
• Messaging systems: RabbitMQ, GCP Pub/Sub, or SQS/SNS.
• Caching & Performance: Redis, Hazelcast; rate limiting; API gateways (Kong/Apigee).
• Observability: Prometheus/Grafana, ELK/EFK, OpenTelemetry, distributed tracing.
• Build & Infra: Maven/Gradle tuning, Helm charts, Terraform, Argo CD.
• Testing: Testcontainers, WireMock/MockServer, contract testing (Pact), chaos testing basics.
• Security: mTLS, secrets rotation, vulnerability scanning (Snyk/Trivy), supply chain security.