Senior Software Engineer, AI-Driven SaaS (Barcelona)

Lengow; Bellprat; Presencial; EUR 70.000 - 110.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Gym membership discounts via Wellhub.

Private health insurance discounts.

Free organic fruit and coffee.

Descripción de la vacante

Lengow in Barcelona is seeking a Senior Software Engineer to join the Market Intelligence team. You will design, build, and maintain AI-driven features, collaborating with the Engineering Manager and Product Manager to deliver scalable SaaS capabilities.

You will explore ML/DL models and LLM-based insights, own projects from discovery to delivery, and help modernize a large codebase toward modular, event-driven architecture. Proficiency in English is required.

Formación

• Senior-level software engineering experience with a track record of delivering production-grade software.
• Experience using AI coding agents as part of the software development workflow, with the ability to review, validate, and improve AI-generated code.
• Experience with cloud infrastructure and distributed systems (Kubernetes, queues like Celery, Redis).
• Experience building and maintaining SaaS applications in production.
• Strong fundamentals: maintainable, testable, scalable, well-structured code.
• Experience with Domain-Driven Design (DDD) and modular architecture.
• Professional proficiency in English, both written and spoken.

Responsabilidades

• Join the Market Intelligence team, working alongside Senior Software Engineers and Software Engineers.
• Design, build, and maintain new products and features for clients, in collaboration with Engineering Manager and Product Manager.
• Explore and develop AI-based solutions, using ML/DL models and LLMs to generate insights and automate product capabilities.
• Take ownership of projects from discovery and technical design through implementation and delivery.
• Contribute to modernization of legacy codebase toward a modern, scalable, event-driven architecture.
• Work on systems that process large amounts of public web data to generate actionable insights.
• Collaborate with UX, Infrastructure, and Data teams, as well as Support and CSMs, to solve customer problems.
• Mentor less experienced engineers and share knowledge to improve engineering practices.

Conocimientos

Senior-level software engineering

AI coding agents

DDD principles

Software engineering fundamentals

English proficiency

Herramientas

Kubernetes

Celery

Redis

Descripción del empleo

Lengow in Barcelona is seeking a Senior Software Engineer to join the Market Intelligence team. You will design, build, and maintain AI-driven features, collaborating with the Engineering Manager and Product Manager to deliver scalable SaaS capabilities.

You will explore ML/DL models and LLM-based insights, own projects from discovery to delivery, and help modernize a large codebase toward modular, event-driven architecture. Proficiency in English is required.