PHP Technical Lead - B2B SaaS (H/F)

As a Technical Lead Developer at Questel, you will play a crucial role in developing our Markify tool. Markify is a global leader in trademark search and brand protection solutions. Our SaaS platform leverages advanced similarity algorithms to deliver industry-leading accuracy for word and image trademark searches, supporting law firms and enterprises worldwide.

We are hiring a hands-on Tech Lead to take ownership of our core algorithmic engine while driving modernization efforts, observability and AI-based improvements.

Your main responsibilities:

• Lead and mentor a team of engineers and algorithm specialists
• Design and optimize similarity, search and ranking algorithms
• Perform reverse-engineering and propose architectural improvements
• Structure the team's work: visibility, traceability, task ownership, and prioritization ensuring scalability and performance of large-scale data systems
• Interact closely with Product, Marketing and Data teams in a Scrum environment
• Drive best practices in code quality, CI/CD and architecture
• Continuously improve production performance and reliability
• Contribute to AI/LLM-based evolution (dataset choices, experimentation)

Do you have experience in Solr?, You have a builder mindset, comfortable in environments without rigid processes. You're curious, pragmatic and able to listen before acting

• 10+ years of experience in software engineering
• Strong hands-on expertise in PHP and/or Java
• Proven Technical Leadership experience in Agile/Scrum teams
• Comfortable digging, debugging, and understanding complex systems
• Experience with distributed systems and performance optimization
• Strong analytical mindset and problem-solving skills
• Fluency in English & French

Good to have:

• Search technologies (Elasticsearch, Manticore, Solr)
• Knowledge in image processing, similarity algorithms or AI/ML or prior work with LLMs and training datasets
• Familiarity with DevOps, monitoring, and observability tools (Grafana, Prometheus)
• SaaS or Intellectual Property experience

• Full-time permanent contract

• Empowerment to bring your own ideas and shape our software and processes.

• Thrive in a flat hierarchy that champions courtesy, honesty, and courage.

• Unlock exciting career development paths in a supportive and ambitious company

• Work with global teams on cutting-edge tech and complex data.

• Design impactful IP solutions for thousands of users worldwide.

• Work with a diverse range of prestigious international clients (Fortune 500, CAC 40, etc.)