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.- 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 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).- Exposure to microservices and distributed systems.- Familiarity with CI/CD pipelines and observability tooling.What we offer- Competitive salary by level: 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.- 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.
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