Kotlin-Java Full Stack Application Developer

We are currently looking for four (4) Kotlin-Java Full Stack Application Developers with at least 5 years of work experience. A fluent Finnish and English is a mandatory requirement for consultant.

Mandatory (Core Requirements):

Development & Architecture:
· Kotlin (primary focus) + Java, Spring Boot
· REST/JSON and SOAP/XML APIs
· Microservices (scalable, fault-tolerant)

Frontend:
· React · TypeScript / JavaScript

Infrastructure & Cloud:
· Kubernetes
· AWS / cloud environments
· NGINX / reverse proxy

DevOps:
· Git · CI/CD (Jenkins, GitHub Actions, etc.)
· Bash / scripting
· Ansible · Linux
· Terraform / CloudFormation

Data:
· SQL + relational databases · Redis / in-memory data store

Security:
· Secure coding (e.g., VAHTI or similar guidelines) · Code reviews
· SSO (SAML2, OpenID Connect)

Testing:
· Integration and unit testing

Other:
· Multi-vendor environments · Finnish + English language skills

Not Mandatory (Scored / Nice to Have):

Advanced Architecture & Production:
· High availability / continuous production
· Classified (high-security) environments

Integrations & Backend:
· mTLS · RabbitMQ
· JWT-based APIs · Shibboleth

Cloud & Operations:
· Monitoring (Prometheus)
· Serverless (AWS Lambda)

Data:
· Elasticsearch
· AWS RDS / Aurora
· Database migrations/conversions

Testing & Quality:
· End-to-end (E2E) test automation
· Test-Driven Development (TDD)
· Security testing (OWASP, Burp, etc.)

Other:
· Data migrations/conversions · Public sector systems (e.g., SÄHKE2, Information Management Act compliance)

Please apply with your CV in English, clearly showing how you match the requirements and answer to the questions above. The client is continously reviewing candidates and we ask you to submit your application as soon as possible.

Allocation: 100%
Assignment start date: 26.10.2026
Assignment end date: 31.12.2027
Location: Helsinki, Finland
Language: Fluent in English and Finnish, both written and spoken

We offer you: We offer a versatile assignment where every day is different and interesting. We also offer a very competitive salary and good employee benefits.

Are you interested in becoming a part of our dynamic team? The position will be filled as soon as a suitable person is found, so please be quick and submit your application!

Please include your salary expectation in your application. For more information, contact Kimmo Kärsämä, tel. 050 412 7500, kimmo.karsama@lokki.fi

Explore Lokki, through our blog and website: https://www.lokki.fi/ .

Lokki Henkilöstöpalvelut Oy (Finnish for Seagull Recruitment Services) has been active in providing recruitment services since 2005 and we belong to The Private Employment Agencies Association HPL. Our vision is to provide the best customer experience with our reliable, humane and effortless service around Finland. Our most important asset is a person who, as we know, thrives in a reliable and supportive atmosphere. At Loki you will be supported by your own human resources consultant throughout your employment relationship. At Lokki, we believe in a partnership achieved as a result of flexible service. Explore us and our vacancies: https://www.lokki.fi/.

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