Mid Java Backend Developer (Hybrid/Remote in Spain)

About Techsoulogy and Tappx

Techsoulogy is our way of doing things and our corporate brand that unifies a broad portfolio of specialist advertising, media, and entertainment firms. It combines the latest technology with a human‑first approach and a constant exploration of knowledge in order to shape the media landscape.

At Techsoulogy we aim to provide a technology and human service that guarantee all areas of the advertising industry throughout the world achieving their goals profitably, effectively and ethically.

Tappx is a fast‑growth AdTech company inside the Techsoulogy family. It delivers digital advertising solutions for multiple platforms including mobile, OTT/CTV and desktop.

Tappx’s proprietary technology empowers publishers to maximise ad revenues across mobile and OTT channels. It offers a distinct point of difference—technology specifically engineered for mobile and OTT markets—thereby offering brands and agencies increased trust and transparency.

Tappx has headlined across numerous high‑profile competitive growth rankings such as Red Herring in 2016, TECH5 in 2018, and in 2020 Tappx was featured as Europe’s 2nd fastest growing advertising company in The Financial Times FT1000.

In Tappx we keep growing and, therefore, we are looking for new talented people to join our Performance Tech team in our IT department.

Position

Mid Java Backend Developer

Responsibilities

• Participate in the entire application life cycle with focus on coding and debugging.
• Write clean and maintainable code of high quality accomplishing estimated hours and due dates.
• Offer technical support to the Performance department.
• Troubleshoot and debug applications.
• Collect technical needs and design requirements.
• Identify new needs and propose solutions to improve our applications.
• Learn about technologies different than Java existing in our tech stack.
• Measure the impact of new features, interpret key metrics and collaborate with the data team for data‑driven decision making.
• Deeply understand the business you are working with.

Benefits

Indefinite contract with competitive conditions.

• Flexible working hours (take control of your schedule) with core time.
• Hybrid model in Barcelona & Madrid (1 day in the office and the rest teleworking) or 100% remote work anywhere in Spain.
• Cool HQ offices in Barcelona and co‑working in Madrid.
• Private health insurance.
• Mental health care with 20 free hours of psychologist support.
• 1 & 1 English or Spanish language lessons.
• Continuous training & development budget.
• Healthy snacks, coffee and a lot of tea (HQ).
• Fun‑filled arcade room (HQ).
• Team building activities.
• Inspiring internal talks and events.
• Interesting employee referral program.
• Engage in Techsoulogy’s CSR initiatives.
• Flexible compensation for transport, meals, and kindergartens.

Salary

For this Mid‑level position, the salary range is €30,000 – €42,000 gross per year, structured across three internal levels that reflect different degrees of skills, autonomy, and impact. The exact band within this range will be determined by our technical team through the assessment process. We are open to negotiating if the candidate exceeds our mid‑level criteria and qualifies for a senior role. The position is currently open for a mid‑level candidate.

Inclusive Statement

At Tappx, we believe the best ideas come from the most diverse minds. We are committed to building a team where different backgrounds, perspectives, and experiences are not just welcomed — they are essential. We foster an inclusive, respectful, and psychologically safe environment where everyone can do their best work and grow as a professional. We take ethics seriously: in how we build our technology, how we treat our people, and how we show up in the industry. Because doing things right and doing things well are not in conflict—they go hand in hand.

Requirements

• 2-3+ years of experience as Backend Developer.
• Minimum 2 years of experience developing in Java, Spring, and MySQL.

Desirable

• Medium knowledge of Git.
• Basic knowledge of Linux.
• Basic knowledge of Docker.
• Basic knowledge of Kafka.
• Basic knowledge of AGILE tools (such as Jira).