Software Engineer (Kotlin/React)

TL;DR

Software Engineer (Kotlin/React): Building and owning end-to-end user-facing product features for a SaaS platform for tradespeople with an accent on fullstack development across React and Kotlin services. Focus on translating product ideas into pragmatic technical solutions, maintaining software quality via CI/CD, and scaling the platform to drive MRR growth.

Location: Hybrid (2 days per week in the Berlin office, Friedrichshain)

Company

A well-funded SaaS startup providing cloud-based software to digitize workflows and reduce administration for craft businesses.

What you will do

• Build and own user-facing product features end-to-end using React, TypeScript, and Kotlin backend services.
• Manage the full delivery lifecycle from initial design through production rollout and iteration.
• Collaborate with product and design teams to shape requirements and deliver high-impact features.
• Translate product ideas into pragmatic technical solutions within a mature codebase.
• Ensure software quality through testing, CI/CD, and production monitoring.
• Work within the Expansion Squad to create new MRR opportunities and increase product completeness.

Requirements

• 5+ years of professional software engineering experience.
• Strong production experience with Java and/or Kotlin, ideally using Spring Boot.
• Proven experience building production frontend applications with JavaScript, TypeScript, and React.
• Solid understanding of API design (REST and GraphQL), data modeling, and relational databases (PostgreSQL).
• Experience with AWS services (SNS, SES, S3) and cloud-native environments (Docker, Kubernetes, Terraform).
• Must be based in or able to commute to the Berlin office 2 days per week.

Nice to have

• Experience with Quarkus.
• Knowledge of Kotlin Multiplatform (KMP), Jetpack Compose, or SwiftUI.

Culture & Benefits

• Hybrid work model with workation options.
• Customizable benefits package from over 35 partners (e.g., Urban Sports Club, Blinkist).
• 30 days of vacation and two Company Weeks per year.
• €500 annual Learning & Development budget and 5 days of paid educational leave.
• Engineering-first culture featuring "TechMondays" for tackling technical debt and Tech Forums for transparent decision-making.