Senior Kotlin Engineer

As a Senior Kotlin Engineer, you’ll join a newly forming pod with the opportunity to influence architectural decisions, shape design discussions, and help deliver elegant solutions to complex financial challenges. This is a role for an engineer who not only writes clean, idiomatic Kotlin but also elevates those around them through collaboration and thoughtful technical leadership.

What You’ll Do

Design & Build Scalable Backend Systems

Develop and maintain high-performance backend services in Kotlin, contributing to APIs, internal tooling, and new product capabilities.

Shape Architecture & Engineering Standards

Participate in collaborative design forums across engineering and business teams, influencing architectural decisions and system evolution.

Support Product Expansion

Build and integrate APIs supporting collections functionality, new financial products, and US market expansion.

Write Clean, Tested Code

Deliver simple, maintainable, well-tested code across all layers of the testing pyramid using modern Kotlin testing frameworks.

Collaborate Across the Business

Work closely with stakeholders across product, operations, and engineering to deeply understand complex financial domains and translate them into scalable systems.

Who You Are

You write elegant, idiomatic Kotlin and value simplicity in design.

You understand that great engineering is about people, not just code.

You’re comfortable navigating complex financial domains and abstract system design.

You think critically about architecture and understand trade-offs between quality and speed.

You’re collaborative, pragmatic, and motivated to continuously improve yourself and your team.

You can solve problems independently but know when to involve others.

Tech Stack You’ll Work With

Backend

Kotlin (1.7+)

AWS

PostgreSQL

RabbitMQ

Docker & Kubernetes

GraphQL (nice to have)

Frontend Ecosystem (Context Awareness)

React & React Native

TypeScript

MobX, Redux

Stylus & SASS

Tooling & Engineering Practices

Gradle

GitHub & GitHub Actions (continuous deployment)

JUnit Jupiter

Kotest

TestContainers

Kanban methodology

Qualifications

Must-Have

Strong commercial experience with Kotlin

Ability to write clean, simple, maintainable code

Solid experience with relational databases (PostgreSQL or similar)

Understanding of software architecture and abstraction principles

Experience writing comprehensive automated tests

Ability to understand and work within complex financial domains

Nice-to-Have

Experience with NoSQL databases

Familiarity with GraphQL

Experience working in FinTech or regulated environments

Experience with Kanban or flow-based agile methodologies