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Kotlin/Java Backend Engineer - Fintech Payments

Smartcore Ag
Barcelona, Spain
2 days ago

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Compensation
€90,000.0 - €150,000.0
Working hours
Regular working hours
Job source
www.jobleads.com

Tech stack

Clean Code Principles Java (Programming Language) Fault Tolerance Java Virtual Machine (JVM) PostgreSQL MongoDB RabbitMQ Spring-boot Kotlin Apache Kafka Microservices

Job description

SmartCore AG is building a scalable core acquiring platform for a fast-growing fintech. You will design and implement microservices in Kotlin/Java, focusing on high performance, fault tolerance, and security. You will work with Kafka/RabbitMQ, PostgreSQL, MongoDB, and modern containers in a distributed team.

Requirements

The role requires deep JVM, Spring Boot expertise, and strong problem-solving skills. You will mentor peers, participate in R&D and ensure high-quality code with tests, while collaborating

Apply for this position

This job is hosted externally. Click below to view the full posting and apply.

Apply on www.jobleads.com

Good distractions

Talks and stories from around this role — technically off-topic, practically not.

Moments

Explore playlists

2:15 min

Developing front-end client applications using Kotlin Multiplatform libraries

Mario Bodemann Mario Bodemann

3:09 min

Understanding Kotlin Multiplatform and its compiler targets

Petar Marijanović · LIVE

2:01 min

Migrating existing applications from MongoDB to Postgres

Nikita Shamgunov Nikita Shamgunov · WWC 2024

1:48 min

Managing asynchronous communications and load leveling

Paweł Siwek Paweł Siwek · WWC 2025

2:18 min

Recommended resources and frameworks for learning Kotlin natively

Iris Hunkeler · LIVE

1:21 min

Realizing the limitations of MongoDB for live statistics

Josip Stuhli Josip Stuhli · WWC 2023

Videos

See all
Why Kotlin is the better Java and how you can start using it thumbnail
58:11
LIVE • almost 3 years ago

Why Kotlin is the better Java and how you can start using it

Iris Hunkeler

Kotlin Multiplatform - True power of native code reuse thumbnail
35:10
LIVE • about 6 years ago

Kotlin Multiplatform - True power of native code reuse

Petar Marijanović

Beyond Kafka & RabbitMQ: Why NATS is the Future of Microservices Messaging thumbnail
22:01
WWC 2025 • 12 months ago

Beyond Kafka & RabbitMQ: Why NATS is the Future of Microservices Messaging

Um e Habiba

40 Minutes to Build a Serverless COVID-19 REST and GraphQL APIs thumbnail
47:16
WWC 2021 • about 5 years ago

40 Minutes to Build a Serverless COVID-19 REST and GraphQL APIs

Maxime Beugnet

Moving from Java to Kotlin thumbnail
28:22
WWC 2022 • about 4 years ago

Moving from Java to Kotlin

Urs Peter

Back(end) to the Future: Embracing the continuous Evolution of Infrastructure and Code thumbnail
40:32
WWC 2022 • about 4 years ago

Back(end) to the Future: Embracing the continuous Evolution of Infrastructure and Code

Matthias Falkenberg, Timo Knapp

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