Senior Kotlin Developer (Fintech)

TL;DR

Senior Kotlin Developer (Fintech): Audit and modernize dependencies, build systems, and tooling for Affirm's Code Standards Team with an accent on Kotlin/JVM ecosystems, Gradle modularization, and open-source alignment. Focus on implementing linters, guardrails, testing standardization, and safe language upgrades to elevate engineering quality at scale.

Location: Colombia

Company

Consulting firm placing talent with top fintech partners like Affirm to drive digital transformation through software engineering and platform solutions.

What you will do

• Audit and update dependencies, replacing deprecated packages with modern open-source alternatives.
• Implement and extend build tooling for service-oriented architecture and repository structure.
• Contribute to testing and standardization for safe Kotlin version upgrades.
• Introduce linters, tooling, and guardrails to enforce best practices.
• Participate in code and design reviews to maintain open-source quality standards.

Requirements

• 5+ years of professional Kotlin development.
• Deep knowledge of Gradle and Kotlin build systems (modularization, dependency resolution, version alignment).
• Understanding of semantic and open-source versioning strategies.
• Experience integrating static analysis, linting, and formatting into CI/CD.
• Strong foundation in unit, integration, and matrix testing for version upgrades.
• Proven ability to identify and replace deprecated dependencies.
• Comfortable in distributed, asynchronous engineering environments.

Nice to have

• Experience upgrading Kotlin versions or JVM transitions.
• Modernizing large or legacy Kotlin codebases.
• Python ecosystems experience.
• Familiarity with Kotlin DSL, multiplatform, structured concurrency, coroutines.
• Contributions to developer productivity or platform engineering tooling.