Acid Tango is a digital product studio. We transform our clients' ideas into digital products, with a focus on digital innovation and bringing disruptive ideas to life.
In every project, we search for the perfect harmony between simplicity, aesthetics, and technology.
We're currently looking for a Lead software developer with solid Java expertise to join us.
You'll bring experience in complex architectures and large-scale data systems, and you'll lead a team of talented developers building products that matter.
What you'll do Inspire, motivate, and lead senior and junior developers, fostering a culture of technical excellence and continuous learning.
Drive the technical evolution of our clients' projects, from architectural decisions to day-to-day implementation.
Champion high-quality engineering practices: Define and evolve software architectures based on Domain-Driven Design (DDD) and Hexagonal Architecture principles, ensuring our codebases stay maintainable, testable, and aligned with business needs.
What we're looking for 5+ years of experience in software development with Java.




Strong command of the Spring Boot framework.
Passion for software craftsmanship and clean, maintainable code.
Deep knowledge of object-oriented programming, algorithms, and software architecture.
Hands-on experience with Test-Driven Development (TDD) as a daily working practice.
Significant back-end experience with Java, with a clear understanding of its strengths and trade-offs.
Solid SQL skills and working knowledge of Postgre SQL, plus familiarity with non-relational databases such as Redis and Mongo DB.
Confident with Git, Linux environments, and the command line.
Nice to have Experience with CQRS, Event Sourcing, or asynchronous messaging (Kafka, Rabbit MQ).
Senior (35–45 K), Architect (45–55 K), Tech Lead (55–65 K).
Performance-based bonus of up to 12% of your salary.
€1,000/year education budget to keep growing.
Versátil working hours and the option to work from home.
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📌 Lead Java Software Engineer (Madrid)
🏢 Acid Tango
📍 Madrid