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)

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!

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/.

You can also find us on Facebook and Instagram.

Employment relationship: Commission

Wage: Other

Number of positions: 4

Source: Job Market Finland/Työmarkkinatori

Osaamisalue: IT & tietoliikenne