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Java Developer
Zusammenfassung
A leading technology recruitment firm is seeking a Java Developer to deliver scalable services and manage payment flows. This hybrid role requires strong Java skills and experience with Apache Kafka and OpenShift. Responsibilities include designing microservices, developing event-driven solutions, and ensuring security across payment operations. Ideal candidates will have a deep understanding of payments and a collaborative mindset. Located in the City of London, this position offers flexibility with 1-2 days a week on-site.
Qualifikationen
- Strong core Java skills, experience with collections and concurrency.
- Hands-on expertise with Kafka and experience building microservices.
- Practical knowledge of deploying applications to OpenShift or Kubernetes.
Aufgaben
- Design and maintain microservices for payment flows.
- Develop event-driven solutions using Kafka.
- Deploy services on OpenShift and manage CI/CD pipelines.
Kenntnisse
Tools
Hybrid Working - Local - 1-2 days a week on site.
Lorien's leading banking client is looking for a Java Developer who thrives on delivering low‑latency, scalable services and event‑driven architectures. If you're experienced with Java, Apache Kafka, OpenShift, and have a strong understanding of payments (cards, international payments).
This role is based in a local office.
This role will be Via Umbrella.
Working in a Hybrid Model of 2 days a week on site.
- Design, build, and maintain microservices in Java (preferably Java 11+ / 17) for mission‑critical payment flows.
- Develop event‑driven solutions using Kafka (producers/consumers, schema management, stream processing).
- Deploy and operate services on OpenShift (Kubernetes-based), including CI/CD pipelines, configuration, scaling, and observability.
- Implement robust error handling, idempotency, retries, and exactly‑once/at‑least‑once delivery where appropriate.
- Ensure security, compliance, and auditability across the payments lifecycle (encryption, secrets management, logging).
- Collaborate with product, QA, SRE, and architecture teams to deliver high‑quality features in iterative releases.
- Contribute to performance tuning, resilience testing, and SLAs/SLOs for real‑time processing.
- Write clean, testable code with unit, integration, and contract tests; participate in code reviews.
- Strong core Java skills (collections, concurrency, JVM fundamentals) and experience building production microservices (Spring Boot/Quarkus/Micronaut).
- Hands‑on expertise with Kafka (topics, partitions, consumer groups, schema registry/Avro/JSON, Kafka Streams/KSQL is a plus).
- Practical experience deploying to OpenShift (routes, deployments, operators) or Kubernetes (Helm, manifests).
- Solid understanding of payments: funds movement, reconciliation, authorisation/capture, settlement, chargebacks, or real‑time payments (e.g. Faster Payments/SEPA Instant). Familiarity with ISO 8583/ISO 20022, PCI basics, or PSD2/Open Banking is beneficial.
- Exposure to CI/CD (GitHub Actions/Jenkins/Argo), containerisation (Docker), and observability (Prometheus/Grafana/ELK/OpenTelemetry).
- Experience with databases (SQL/NoSQL), caching (Redis), and message semantics (idempotency, deduplication).
- A collaborative mindset, ownership of outcomes, and a passion for building resilient, scalable systems.
- Experience with Hazelcast, Kafka Connect, Schema Registry, or Confluent Platform.
- Knowledge of security in payments: OAuth2/OpenID Connect, mTLS, HSMs, tokenisation.
- Background in performance engineering (JMH, Gatling, k6) and chaos/resilience testing.
- Cloud experience (AWS/GCP/Azure) and infrastructure‑as‑code (Terraform/Ansible).
- Domain experience in card acquiring, issuer processing, merchant services, AML/fraud, or risk engines.
* Der Gehaltsbenchmark wird auf Basis der Zielgehälter bei führenden Unternehmen in der jeweiligen Branche ermittelt und dient Premium-Nutzer:innen als Richtlinie zur Bewertung offener Positionen und als Orientierungshilfe bei Gehaltsverhandlungen. Der Gehaltsbenchmark wird nicht direkt vom Unternehmen angegeben. Er kann deutlich über bzw. unter diesem Wert liegen.