Kryptos Technologies UK Limited

Apache Flink Engineer

Kryptos Technologies UK Limited

contract

Posted on:

Location Type: Hybrid

Location: London • United Kingdom

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Tech Stack

ApacheAWSCloudGrafanaJavaKafkaMongoDBPythonSplunk

About the role

  • Design and implement stateful stream-processing jobs in Apache Flink (primarily Java), to process user interaction events and produce near real-time outputs for downstream services.
  • Integrate Flink with Kafka/AWS MSK, S3 and the chosen online store (MongoDB/MongoDB Atlas).
  • Own streaming non-functional requirements: correctness, fault tolerance, checkpointing/recovery, backpressure handling, and performance tuning.
  • Define and implement production readiness: observability (metrics/logs/tracing), alerting, dashboards and runbooks.
  • Support CI/CD and infrastructure-as-code practices to deploy and operate Flink workloads safely in AWS.
  • Enable the team via knowledge transfer (pairing, design/code reviews, documentation and handover).

Requirements

  • Strong experience building and operating production Apache Flink applications (event-time concepts, windows/watermarks, state, checkpointing and fault tolerance).
  • Hands-on AWS experience operating streaming/data workloads (IAM, networking/VPC basics, deployment, observability and incident troubleshooting).
  • Experience integrating Flink with Kafka (including AWS MSK) and cloud services/storage (e.g., S3).
  • Highly proficient in Java and Python (production experience required).
  • Strong software engineering fundamentals: clean, maintainable code; pragmatic testing; effective code review.
  • Comfort mentoring/pairing with engineers to up-skill the team.
  • Experience with Amazon Managed Service for Apache Flink and/or running Flink on EKS/ECS is desirable.
  • Experience with MongoDB or MongoDB Atlas for low-latency, online-serving use cases is desirable.
  • Infrastructure-as-code (CloudFormation) and modern observability tooling (CloudWatch, Grafana, OpenTelemetry, Splunk) is desirable.
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
Apache FlinkJavaPythonKafkaAWSMongoDBCloudFormationCloudWatchGrafanaOpenTelemetry
Soft Skills
mentoringpairingdesign/code reviewsdocumentationknowledge transfereffective code reviewpragmatic testingclean codemaintainable codeperformance tuning