Senior Developer – Kotlin

Soluções eSales | Logística, Financeiro, Analytics e File Transfer

Senior Kotlin Developer responsible for microservices in financial communication gateway. Collaborating with cross-functional teams and ensuring robust performance.

Posted 6/26/2026full-timeRemote • 🇧🇷 BrazilSeniorWebsite

Tech Stack

Tools & technologies

AzureCloudKotlinKubernetesMicroservicesPostgresSOAP

About the role

Key responsibilities & impact

Develop and evolve Kotlin microservices with a focus on robustness, performance and scalability.
Implement end-to-end integrations with financial institutions' APIs — interpreting bank manuals and technical specifications and translating them into reliable solutions.
Model domain-driven solutions (DDD) and manage communication between services (REST and event-driven patterns).
Act as a partner to Product, providing technical perspective to refine requirements and anticipate gaps.
Ensure security, observability and reliability from the design stage; participate in code reviews and in production incident resolution.

Requirements

What you’ll need

5+ years of JVM development experience, with solid, proven expertise in idiomatic Kotlin.
Experience with microservices architecture and inter-service communication.
Integration fundamentals: REST and SOAP APIs; deep HTTP knowledge (status codes, headers, idempotency, retries); authentication (OAuth2, mTLS, payload signing); digital certificates and queues/messaging.
Ability to interpret third-party documentation and specifications (APIs, banking manuals) and implement them autonomously.
Strong foundation in DDD, Clean Code and SOLID principles; experience with relational databases (PostgreSQL).
Strong analytical skills and clear technical communication for a remote team.
Experience applying AI to development (assistants, agents, analysis support) — we use AI heavily in our workflow and value candidates who have already integrated it into their routine.
Prior experience with financial, banking or payments systems.
Experience with Ktor, event-driven architecture, automated testing, CI/CD and cloud (Azure/AKS, Kubernetes); API documentation (OpenAPI).

Benefits

Comp & perks

Totalpass for your physical and mental well-being.
Psychological support program.
Company-provided equipment.
Day OFF.
Referral bonus for recommending professionals.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Kotlinmicroservices architectureREST APIsSOAP APIsdomain-driven design (DDD)Clean CodeSOLID principlesPostgreSQLautomated testingCI/CD

Soft Skills

analytical skillstechnical communication