Kotlin Java Developer

Unikie Oy; Tampere; On-site; EUR 60,000 - 90,000; Full time

Job summary

Unikie Oy is seeking experienced Kotlin/Java Full Stack Developers for a long-term customer project. You will build scalable web applications in a cloud-native setup, spanning Kotlin/Java backend, React frontend, and cloud infrastructure.

The role emphasizes CI/CD, automation, and secure development practices. Ideal candidates will have 5+ years in full stack or backend roles, strong Kotlin/Java/Spring Boot skills, React experience, and hands-on work with Kubernetes and AWS.

Qualifications

• 5+ years of experience in full stack or backend development.
• Strong hands-on experience with Kotlin, Java, and Spring Boot.
• Experience with React and TypeScript/JavaScript.
• Solid understanding of microservices, API integrations, and Kubernetes on AWS.
• Familiar with CI/CD, IaC (Terraform/CloudFormation/Ansible), and cloud-native security practices.

Responsibilities

• Develop backend services using Kotlin, Java, and Spring Boot.
• Build and maintain React applications with TypeScript/JavaScript.
• Design and integrate REST and SOAP APIs.
• Develop scalable microservices on Kubernetes and AWS.
• Contribute to CI/CD pipelines and infrastructure automation.
• Work with SQL databases, Redis, Linux environments, and secure authentication solutions.
• Collaborate with stakeholders in a multi-vendor environment.

Tools

CI/CD tools

Terraform

CloudFormation

Ansible

Job description

Kotlin Java Developer

Unikie is looking for experienced Kotlin Java Full Stack Application Developers to join a long-term customer project. In this role, you will develop and maintain business-critical web applications in a modern cloud-native environment. You will work across the full stack, building Kotlin/Java backend services, developing React frontends, and contributing to cloud infrastructure, CI/CD, and software architecture.

What you'll do

• Develop backend services using Kotlin, Java, and Spring Boot
• Build and maintain React applications with TypeScript/JavaScript
• Design and integrate REST and SOAP APIs
• Develop scalable microservices running on Kubernetes and cloud platforms such as AWS
• Contribute to CI/CD pipelines, DevOps practices, and infrastructure automation
• Work with SQL databases, Redis, Linux environments, and secure authentication solutions
• Collaborate with stakeholders and development teams in a multi-vendor environment

Skills Required

• Kotlin
• Java
• JavaScript
• React
• Java Spring Boot
• AWS
• Kubernetes 5+ years of experience in Full Stack or Backend development, Strong hands-on experience with Kotlin, Java, and Spring Boot, Experience with React and TypeScript/JavaScript, Solid understanding of microservices and API integrations, Experience with Kubernetes, cloud platforms (AWS), and CI/CD tools, Familiarity with Infrastructure as Code tools such as Terraform, CloudFormation, or Ansible, Good knowledge of SQL databases and Redis, Experience with secure development practices and testing, Experience working in multi-vendor environments, Fluent Finnish and English