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.
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What you'll do
* Inspire, motivate, and lead senior and junior developers, fostering a culture of technical excellence and continuous learning.
* Work closely with our design team and clients to deliver beautiful, thoughtful, and effective products that have a real impact on their business.
* Drive the technical evolution of our clients' projects, from architectural decisions to day-to-day implementation.
* Champion high-quality engineering practices: TDD, clean code, code reviews, pair programming, and continuous refactoring.
* 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.
* Prioritize and coordinate code improvement initiatives across the team.
* Bring your ideas and knowledge to help us keep raising the bar.
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.
* Solid understanding of Domain-Driven Design (DDD): bounded contexts, aggregates, ubiquitous language, and strategic design.
* Practical experience designing and building applications with Hexagonal Architecture (Ports & Adapters) or similar approaches such as Clean Architecture or Onion Architecture.
* Significant back-end experience with Java, with a clear understanding of its strengths and trade-offs.
* Experience designing and exposing APIs (REST and ideally event-driven).
* Solid SQL skills and working knowledge of PostgreSQL, plus familiarity with non-relational databases such as Redis and MongoDB.
* Confident with Git, Linux environments, and the command line.
Nice to have
* Experience with CQRS, Event Sourcing, or asynchronous messaging (Kafka, RabbitMQ).
* Exposure to microservices and distributed systems.
* Familiarity with CI/CD pipelines and observability tooling.
What we offer
* Competitive salary by level: Senior (35–45K), Architect (45–55K), Tech Lead (55–65K).
* Performance-based bonus of up to 12% of your salary.
* €1,000/year education budget to keep growing.
* Flexible working hours and the option to work from home.
* €300 to improve your home setup.
* Challenging projects with a focus on innovation.
* A dynamic, diverse team that wants to leave a mark.
* International clients with thousands of users. xohynlm
If you think you'd be a good fit, we'd love to talk. ;-)