Senior Freelance Scala Software Engineer - Team PaymentSwan is looking for a Senior Freelance Software Engineer to join is tech team of 70+ people for a specific project over a few months.
The Engineering team is by far the largest at Swan. This team includes Software developers, who build payments and end-customer applications, as well as Infrastructure, DevOps, QA, and Security.
We build with intent, focusing on solving real problems that matter. In a regulated environment, compliance, security, and resilience are at our core. We value ownership, open collaboration, and a shared vocabulary to keep complexity manageable. Simplicity is key, clean, maintainable code wins over clever tricks. We ship fast, learn continuously, and always strive for excellence. 💡
✨ Your mission
You will be technically responsible for one or more projects.
You will have the opportunity to solve problems in one of the most demanding IT domains with a reactive architecture.
You will design with the product team the bank by API.
You will improve the performance of a system with a rapidly growing load.
You will ensure the respect of the architecture rules and of the automated tests
Our technical environment
Experience: From 4/5 years as a Software Developer with a strong grasp of back-end systems.
Mastery of common back-end issues (perfomance improvements, observability, database queries (SQL) and SQL performance improvements)
Good knowledge of a JVM language (Kotlin, Scala or Java)
Hands-on experience with automated testing & CI/CD
Bonus: Familiarity with GraphQL, Kafka, and microservices architecture
Passionate about functional programming & open source
Always up to date with tech trends (meetups, blogs, side projects)
Fluent in English
Our ideal teammate: Empathetic. Skilled. Frank. We love to challenge each other, and we leave our egos at the door.
It’s okay if you don’t tick all the boxes — don’t let imposter syndrome prevent you from applying! 🙌
Swan is committed to providing a caring work environment for all employees, regardless of age, sex, disability, sexual orientation, race, religion, or belief.
When it comes to recruitment, we’re interested in your work experience, skills, and overall personality. Because diversity makes the workplace stronger and is necessary for Swan’s success, we are intensifying efforts to incorporate concrete actions to help us improve in this area.