Overview In this role you will design and build AI-enabled market intelligence products that transform public web data into actionable insights. You'll modernize a legacy, build scalable, event-driven services, and collaborate with cross-functional teams to meet customer needs. You will influence architecture and engineering practices while mentoring peers. The position centers on improving pricing, compliance, and competitive visibility for merchants through innovative tech.

Compensaciones / Incentivos Gym membership discounts via Wellhub

Private health insurance discounts

Free organic fruit and coffee

Learning & development opportunities

Office in Barcelona with 360° city views

Flexible working hours (as per schedule)

Responsabilidades Design, implement, and maintain new products and features for clients

Lead technical projects from discovery to delivery and continuous improvement

Modernize legacy codebase toward a scalable, asynchronous architecture

Develop and deploy AI-based solutions (ML/DL, LLMs) to generate insights

Collaborate with UX, Infrastructure, Data, Support, and CSM teams to solve customer problems

Improve engineering practices,



architecture, and technical standards

Contribute to products that help customers optimize pricing and monitor compliance

Work on systems processing large volumes of public web data to generate insights

Requisitos principales Senior-level software engineering experience with production-grade software delivery

Experience reviewing and improving AI-generated code from AI coding agents

Experience with cloud infrastructure and distributed systems (Kubernetes, Redis, Celery)

Proven track record building and maintaining SaaS in production

Strong fundamentals: maintainable, testable, scalable, well-structured code

Experience with Domain-Driven Design (DDD) and modular architectures

Professional English proficiency (written and spoken)

Strong collaboration across cross-functional teams

Mentoring and knowledge sharing

Leadership in driving architectural decision-making

PHP and/or Python

AI/ML/DL model experience and LLM-based solutions

Cloud-native and microservices architectures

📌 Senior Software Engineer (Barcelona)
🏢 Lengow
📍 Barcelona