Senior Backend Engineer - AWS, Event-Driven, Hybrid

Jit Team; Województwo pomorskie; Hybrid; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Flexible work organization

International environment

Community integration meetings

Job summary

Jit Team in Poland is seeking an experienced back-end engineer to join a mature, self-organised agile team. You will design and build serverless, event-driven services on AWS, focusing on consolidation of tracking channels and scalable APIs.

You will optimise PostgreSQL performance, improve AWS architecture for cost and resilience, and contribute to architecture discussions while maintaining high-quality tests and observability. English is used daily in an international environment.

Qualifications

• 5+ years back-end development experience with Python or Scala.
• 5+ years hands-on AWS experience in production.
• Experience with AWS services: API Gateway, Step Functions, ECS/Fargate, SQS, SNS, EventBridge, Kinesis and/or MSK (Kafka).
• Knowledge of RDS/Aurora PostgreSQL, DynamoDB and S3.
• Strong understanding of event-driven architecture, message processing, idempotency, retries, dead-letter queues and schema evolution.

Responsibilities

• Design, develop and optimise serverless and event-driven backend services on AWS.
• Improve AWS architecture in terms of cost, performance, scalability and resilience.
• Optimise event stream processing, including throughput, latency, message ordering, retries and error handling.
• Improve PostgreSQL performance through query optimisation, indexing, partitioning and data modelling.
• Implement observability solutions, including metrics, distributed tracing, alerting and SLOs.
• Ensure code quality through unit and integration testing, as well as load and performance testing.
• Contribute to architectural discussions and evaluate technical trade-offs.

Skills

Back-end development (Python/Scala)

AWS in production

Event-driven architecture

PostgreSQL optimization

English communication

Tools

API Gateway

Step Functions

ECS/Fargate

SQS

SNS

EventBridge

Kinesis

MSK (Kafka)

CloudFormation

Job description

Jit Team in Poland is seeking an experienced back-end engineer to join a mature, self-organised agile team. You will design and build serverless, event-driven services on AWS, focusing on consolidation of tracking channels and scalable APIs.

You will optimise PostgreSQL performance, improve AWS architecture for cost and resilience, and contribute to architecture discussions while maintaining high-quality tests and observability. English is used daily in an international environment.