Infinity Quest
Software Engineer
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Role: Kafka Migration Engineer
Location: London
Note: This role requires strong .NET skills in addition to Kafka expertise. All producers and consumers are.NET applications — APIs produce messages, and some services both consume and produce. This is not an infrastructure-only Kafka role; it requires reading, modifying, and validating .NET Kafka client code.
Responsibilities
- Migrate all Kafka producers and consumers from DHLParcel.UK.Kafka to Confluent Cloud
- Update Confluent.Kafka .NET client configuration (SASL auth, Schema Registry, bootstrap servers)
- Validate message flows end-to-end for apps acting as both producer and consumer
- Ensure consumer group configurations, offset management, and error handling are correct post-migration
- Kafka throughput validation and performance testing
- Work with.NET engineers to resolve application-level Kafka integration issues
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Required Skills
- C#/.NET — strong coding ability (reading and modifying producer/consumer code)
- Confluent.Kafka .NET client library (ProducerBuilder, ConsumerBuilder, configuration)
- Confluent Cloud — SASL/PLAIN authentication, Schema Registry, ACLs
- Kafka internals: topics, partitions, consumer groups, offset management, rebalancing
- Message serialization (Avro, JSON Schema) with.NET-specific serializers/deserializers
- Troubleshooting Kafka connectivity and message flow issues in .NET applications
- Kafka monitoring (consumer lag, throughput, error rates)
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Nice to Have
- Experience with apps that are both consumers and producers (event-driven architectures)
- Schema evolution and compatibility strategies in Schema Registry
- Performance tuning (batch size, linger.ms, compression) for.NET producers
- Kafka Connect and MirrorMaker for migration scenarios
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