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ABOUT US: Mobwizards is a fast-growing, agile ad-tech company operating in the mobile Value-Added Services (mVAS) space across multiple international markets. We build and run the infrastructure that connects mobile operators, advertisers, and users—from direct carrier billing flows to campaign tracking, data pipelines, and internal tools. We’re looking for a Senior Developer who can work independently and take ownership of problems from start to finish. You’ll work closely with the CTO on backend systems, APIs, integrations, and internal tools, helping to build and improve the technology that powers our business. This role requires strong problem-solving skills, initiative, and the ability to communicate clearly with clients and partners in English. Responsabilities Design, develop, and implement technology solutions across the full stack, from user interfaces (frontend) to server-side logic and databases (backend). Contribute throughout the entire software development lifecycle—from concept and design to delivery and maintenance—ensuring high quality and alignment with business objectives. Develop software based on technical specifications defined by clients or the company, performing analysis, design, implementation, and testing as part of collaborative team projects. Participate in the creation and integration of APIs with client systems, while also contributing to the development of MobWizards’ frontend applications and web pages, ensuring an efficient, reliable, and user-friendly experience. Qualifications 5+ years of professional software development experience, with a strong foundation in PHP. Fluent English, both written and spoken, used daily with clients and external partners. Good knowledge of HTML, CSS, and JavaScript — you’ll be responsible for the full stack, including frontend development. Strong understanding of relational databases (MySQL/MariaDB), including schema design, query optimization, and core database principles. Experience with REST APIs, both building and consuming them. Familiarity with Linux environments and basic DevOps/infrastructure concepts (Docker, cloud platforms). Strong debugging and troubleshooting skills — able to read logs, trace issues across systems, and formulate hypotheses to identify root causes. Availability to work in a hybrid model (3 days a week at the Lisbon office). What We Offer A Welcoming Workplace: Enjoy our newly renovated office in Alcântara, designed for a dynamic, friendly, and multidisciplinary team. Work-Life Balance: We offer a hybrid and flexible work model, respecting both your professional and personal time. Professional Development: We are committed to helping you grow and achieve your goals. With our Training Plan, you will find opportunities to enhance your professional skills while pursuing your personal ambitions. Wellness Activities.
Here's where they are and how to stand out in your next interview.
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Most developer ads you'll see are written in English: 18,397 of the 24,795. That doesn't tell you whether the job itself requires you to speak English or work in English daily, so read each posting carefully. Don't assume the language of the ad matches the language of the team.
The employers posting the most developer roles are Link Group (369 jobs), Upvanta (257), jobgether (226), and OfferZen (212). If you're applying to any of these, research their hiring patterns. They move fast and post often, which means they're either scaling hard or replacing people who didn't fit.
In your interview, expect this: 'Walk me through the last time you had to debug something that took you more than an hour. What was it, what did you try first, and what would you do differently?' Hiring managers ask this to see if you think systematically or just try random fixes. Have a real example ready with specifics.