Senior Backend Engineer

About Us : At Luzia, we ship fast : keep it simple, learn from every experiment, own outcomes, and build what our users need.

We thrive in a fast-paced environment and expect everyone to use AI daily—automating the routine and amplifying creativity—because using AI isn't optional; it's how we win.Backed by top-tier Silicon Valley Investors (Kholsa Ventures and A

• ), Luzia launched in April
• initially designed as a personal assistant on WhatsApp.

By making AI accessible on WhatsApp, we've grown rapidly and have experienced great success; capturing a unique audience of GenZ users based in LATAM.

In our first 18 months, Luzia has become the fastest Spanish consumer-focused company to reach 1M daily active users worldwide.We are constantly evolving and working on improving our app to deliver best-in-class user experience focusing on education and companionship for GenZ - helping them learn, connect and grow.As a Senior Software Engineer, you'll join our founding engineering team, driving the development of scalable, high-impact solutions that power our AI-driven products.Responsibilities : Lead Backend Development : Design, build, and deploy backend services with a focus on scalability, performance, and robustness, particularly for applications utilizing LLMs.Cross-Functional Collaboration : Work closely with product, AI, and engineering teams to translate business needs into scalable, high-performing technical solutions.API Development : Design and manage inter-service communications, ensuring seamless integration across our AI products.Code Excellence : Maintain high standards for code quality, testing, and deployment, championing best practices in continuous integration and development.Mentorship : Provide guidance and mentorship to junior engineers, fostering a culture of innovation, collaboration, and continuous improvement.System Optimization : Continuously analyze and optimize system performance, scalability, and reliability.Architectural Input : Engage in system architecture discussions, influencing the technical roadmap and future development strategies.Requirements : Experience : 5+ years of professional experience in Python development (additional languages are a bonus).

Startup DNA : Previous experience in a startup environment, thriving in fast-paced, dynamic teams.Cloud Expertise : Hands-on experience with cloud environments, modern databases, and distributed data ecosystems.Communication : Strong communication skills.

Fluency in English and being comfortable working in an English environment is necessary.Customer-Centric : Driven by a product-focused mindset, ensuring technical solutions align with customer needs.Proactive Leadership : Self-starter with excellent prioritization skills, able to work autonomously while driving results.Business-Technical Translator : Ability to communicate complex technical concepts in a way that resonates with business stakeholders.Education : Bachelor's degree in Computer Science, Engineering, or related fields.Nice-to-Haves : Experience with high-performance computing and system optimization.Previous leadership or project management experience.B2C experience, particularly with large user databases.Hands-on experience building or contributing to AI products.

Experience or side projects involving AI / ML technologies.Benefits : Be part of an innovative project in the field of artificial intelligence.Opportunities for growth and professional development in cutting-edge technologies.Competitive salary and attractive benefits package.Flexible, inclusive, and collaborative work culture.Why Join Us?

We are on a journey to make AI meaningful, accessible, and transformative for millions of users.

At Luzia, you'll have the opportunity to be part of a fast-growing startup, contributing to products that are transforming the AI space.

We are a product and engineering-oriented team, always seeking to push boundaries and drive forward momentum.Our Culture and Values : We live and breathe agility.

Our culture is steeped in a 'ship, experiment, iterate, ship' mentality, where action, experimentation, and rapid execution are paramount.

Our team is collaborative, innovative, and deeply mission-driven.

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