MarbleX - Java Solution Architect

Role Summary :

We are looking for a hands-on Java Solution Architect to design and lead scalable, secure, event-driven platforms. The ideal candidate has deep expertise in Java/Spring Boot microservices, Kafka, Redis/KeyDB, and open-source databases (Cassandra, PostgreSQL), with experience building high-throughput, low-latency systems.

Key Responsibilities :

Architecture &

• Design :
• Define service boundaries using DDD; create service contracts and API specifications.
• Design Kafka-based event flows (topics, partitions, retention, DLQs, idempotency).
• Choose fit-for-purpose storage (Cassandra vs PostgreSQL) for workloads :
• Cassandra for time-series, high write throughput, and horizontal scaling.
• PostgreSQL for transactional integrity, complex joins, and reporting.
• Engineer caching strategies using Redis/KeyDB (read-through/write-through, TTL, eviction).
• Establish NFRs (performance, availability, RPO/RTO) and capacity planning.

Security &

• Compliance :
• Implement OAuth2/OIDC, mTLS, token-based auth, key rotation, encryption at rest/in transit.
• Work with InfoSec/AppSec for threat modeling, VAPT, secure SDLC integration.

DevOps &

• Observability :
• Drive CI/CD pipelines (blue/green/canary), container orchestration (Kubernetes).
• Define SLOs/SLIs; implement metrics, logs, traces; promote proactive alerting.

Governance &

• Standards :
• Publish architecture guidelines, coding standards, and API governance (versioning, deprecation).
• Champion documentation (ADR, sequence diagrams, data flow, runbooks).

Mentoring &

• Leadership :
• Coach engineers; conduct design/code reviews; lead PoCs and migrations.
• Collaborate with Product/Delivery to align scope, timelines, and risk mitigation.

Required Technical Skills (Deep Expertise) :

• Java : Java 17 , Spring Boot, Spring Cloud, reactive programming (WebFlux).
• Microservices : API Gateway, service mesh (Istio/Linkerd), resilience (Resilience4j).
• Kafka : Kafka Connect, Streams, consumer lag management, schema registry (Avro/JSON).
• Redis/KeyDB : Cluster configuration, HA, persistence (AOF/RDB), pub/sub and streams.
• Databases :

1.

Cassandra : Data modeling (partition keys, clustering), consistency levels, compaction strategies.

2.

PostgreSQL : Indexing strategies, partitioning, query planning, isolation levels, VACUUM.

• Cloud &
• Infra : Docker, Kubernetes, Helm/Terraform
• AWS/Azure/GCP (EKS/AKS/GKE).
• Observability : Prometheus, Grafana, ELK/EFK, OpenTelemetry.
• Security : JWT, mTLS, secrets management (Vault/KMS), OWASP Top 10, compliance-aware design.

Soft Skills :

• Strong stakeholder communication; ability to simplify complex technical decisions.
• Ownership mindset; risk identification and mitigation.
• Mentorship; collaborative leadership across cross-functional teams.

Preferred Experience :

• Payments, reconciliation/settlement, high-throughput transaction systems.
• Event-driven architecture, CQRS, outbox/CDC patterns (Debezium).
• Performance tuning under production loads; chaos testing.