Software Developer (Apache Kafka)

📍 Location: Jakarta Utara, Sunter

💼 Employment Type: Contract (6 - 12 month)

Job Description

We are looking for a Kafka Developer to join our team and support our client in designing, developing, and optimizing event-driven systems using Apache Kafka to support reliable, secure, and high-performance real-time payment transaction processing.

Responsibilities

• Design and develop Kafka Producers, Consumers, Kafka Streams, and Kafka Connect.
• Design and optimize Kafka topics, partitions, retention policies, and data serialization such as Avro, Protobuf, or JSON.
• Develop and maintain real-time data processing pipelines for payment and fund transfer systems.
• Support payment processes involving clearing, fund transfer, and settlement.
• Implement reliable transaction processing using Exactly-Once Semantics (EOS) and transactional messaging.
• Implement fault-tolerant mechanisms such as retry, Dead Letter Queue (DLQ), and error handling.
• Monitor Kafka cluster performance, including consumer lag, throughput, and latency.
• Collaborate with engineering and payment system teams to ensure system reliability, scalability, and security.
• Develop and execute unit testing, integration testing, and load/performance testing.

Requirements

• Minimum 2–4 years of experience as a Kafka Developer, Software Developer or similar role.
• Strong hands-on experience with Apache Kafka and real-time/event-driven architecture.
• Proficiency in at least one programming language: Java, Scala, or Python.
• Preferred: Experience developing or implementing payment systems, payment gateways, core banking systems, or fund transfer systems.
• Highly preferred: Experience with payment processes involving clearing and/or final settlement.
• Good understanding of fund transfer and financial transaction processing.
• Familiarity with financial messaging standards such as ISO 20022, SWIFT, or other local/regional payment messaging standards is a plus.
• Experience with relational databases such as PostgreSQL or Oracle and/or NoSQL databases.
• Basic knowledge of Docker and Kubernetes.
• Familiarity with Kafka monitoring tools such as Prometheus, Grafana, or Kafdrop is a plus.
• Understanding of Kafka security mechanisms such as SSL/TLS, SASL, or similar is a plus.

Preferred Experience

• Candidates with experience in the following areas are highly preferred:
• Payment System
• Fund Transfer
• Clearing
• Settlement / RTGS
• Payment Gateway
• Core Banking
• ISO 20022 / SWIFT
• High-volume and real-time financial transaction processing