Lead Java Developer

Acid Tango; España; Híbrido; EUR 35.000 - 65.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Flexible working hours

Home office option

Education budget €1,000/year

Performance-based bonus up to 12%

Challenging projects

International clients

Descripción de la vacante

Acid Tango is seeking a Lead software developer with strong Java expertise to join our digital product studio in Spain. You will lead a team of developers, tackle complex architectures and large-scale data systems, and drive products that matter.

You will collaborate with design teams and clients to deliver impactful solutions, champion TDD and clean code, and steer architectural decisions using Domain-Driven Design and Hexagonal Architecture.

Formación

• 5+ years of experience in Java software development.
• Strong command of the Spring Boot framework.
• Deep knowledge of object-oriented programming, algorithms, and software architecture.
• Hands-on experience with Test-Driven Development (TDD) as a daily practice.
• Solid understanding of Domain-Driven Design (DDD): bounded contexts, aggregates, ubiquitous language, and strategic design.
• Experience designing and exposing APIs (REST and ideally event-driven).

Responsabilidades

• 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 products that have a real business impact.
• Drive the technical evolution of clients' projects, from architecture decisions to implementation.
• Champion high-quality engineering practices: TDD, clean code, code reviews, pair programming, and refactoring.
• Define and evolve software architectures based on DDD and Hexagonal Architecture principles.
• Coordinate code improvement initiatives across the team.
• Bring ideas and knowledge to help raise the bar.

Conocimientos

Java

Spring Boot

TDD

DDD

Hexagonal Architecture

REST APIs

Git

Linux

Herramientas

PostgreSQL

Redis

MongoDB

Descripción del empleo

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 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.

If you think you'd be a good fit, we'd love to talk. ;-)