Backend Developer, Kotlin – Senior

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🕒 July 21

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Internas

WebsiteLinkedInAll Job Openings

- employees

📦 Logistics

🍽️ Food & Beverage

💼 Consulting

Logistics • Food & Beverage • Consulting

Internas is a Polish wholesaler and retailer of gardening and outdoor-living products, offering a catalogue of about 15,000 items including seeds, bulbs, seedlings, shrubs and trees, soils, fertilizers, plant protection products, gardening tools, irrigation equipment, and seasonal goods. Operating for 25 years, Internas serves both retail customers through brick-and-mortar stores and online shops and business customers via wholesale distribution from its central warehouse and an additional market branch, offering professional buying support, its own delivery fleet, and fast logistics.

📋 Description

• Develop, evolve, and maintain backend services using Kotlin, ensuring high performance, scalability, and security for core banking systems in a mission-critical environment. • Contribute to the architecture and implementation of cloud-native solutions on AWS, using EKS/Fargate for container orchestration, SQS for messaging, DynamoDB for persistence, and applying AWS Well-Architected Framework practices to ensure robustness, cost efficiency, and compliance. • Implement messaging and streaming integrations with Kafka and SQS, ensuring resilience, monitoring, and reliable event processing in distributed systems. • Develop and automate unit, integration, and performance tests, build robust CI/CD pipelines, and contribute to the continuous improvement of code quality. • Build, maintain, and evolve Docker containers, implementing orchestration via Kubernetes (EKS) to ensure secure, scalable, and highly available deployments. • Actively participate in technical discussions, code reviews, the definition of architectural patterns, and design decisions—questioning approaches, proposing improvements, and sharing knowledge with the team. • Apply security-by-default practices, such as IAM least privilege, encryption at rest and in transit, and secure secrets management—anticipating risks and ensuring solution compliance. • Explore and validate the use of AI tools to support development, critically reviewing AI-generated outputs and promoting responsible innovation in day-to-day work. • Collaborate with multidisciplinary teams (Product, QA, SRE, Security), participating in agile ceremonies, technical alignments, and continuous improvement initiatives.

🎯 Requirements

• Strong experience in backend development with Kotlin • Hands-on experience with AWS, especially EKS/Fargate, SQS, and DynamoDB • Practical knowledge of the AWS Well-Architected Framework • Messaging & streaming: Kafka and SQS • Testing: Experience with unit, integration, and performance tests • Containers: Docker and orchestration with Kubernetes (EKS)

🏖️ Benefits

• We value the continuous growth of zuppers, encouraging each person to pursue paths that accelerate their professional development.