Senior Backend Engineer – AI SaaS

Landbot

Backend Engineer responsible for coding and guiding technical direction in an AI SaaS company. Collaborating to scale the platform and deliver impact to users.

Posted 6/15/2026full-timeBarcelona • 🇪🇸 SpainSenior💰 €60,000 - €75,000 per yearWebsite

Tech Stack

Tools & technologies

AWSAzureCloudDistributed SystemsGoogle Cloud PlatformJavaScriptMongoDBMySQLNode.jsNoSQLPostgresPythonRedisTypeScript

About the role

Key responsibilities & impact

Combine hands-on coding with guiding your team’s technical direction.
Ensure solutions are scalable, maintainable, and aligned with Landbot’s mission.
Act as the captain of the team, embodying values, energy, and attitude.
Translate product requirements into clear technical strategies.
Foster engineering excellence and growth in teammates.
Collaborate with Product to turn business goals into technical strategies and plans.
Design and evolve systems that scale with traffic, data complexity, and AI-driven use cases.
Write clean, maintainable code while continuously improving practices and quality.
Mentor and support your team, leading by example in code, reviews, and collaboration.
Safeguard delivery pace: reduce blockers, manage technical debt, and keep flow sustainable.

Requirements

What you’ll need

You’re fluent in modern backend stacks (e.g., Node.js, TypeScript, Python )
Experience with relational databases ( Postgres, MySQL ) as well as NoSQL systems like Redis, MongoDB.
Comfortable working with complex backend stacks and architectural approaches (e.g., Domain-Driven Design).
Passionate about testing everything: unit, integration, performance, quality is your compass.
Curiosity about how to bring AI models into production systems, from integrating APIs to optimizing performance and reliability.
Proven experience building web applications at scale and working with distributed systems.
Hands-on experience operating services in production environments, with knowledge of cloud infrastructure (GCP, AWS, or Azure).
Obsessed with continuous improvement: seeking feedback and raising the bar for yourself and others.
Thrives in collaborative environments, values feedback, and helps others raise the bar.
Fluent in English and Spanish.
Eligibility to work in Spain.

Benefits

Comp & perks

Hybrid work model: flexibility to work remotely, from our Barcelona office 🏙️, or a combination of both.
Collaborative work environment.
Flexible working hours.
Paid time off and flexible holidays: 26 paid days per year (23 regular days + December 24th & 31st) 🎉, plus one additional day off on your birthday.
Annual budget for training and professional development 📚.
Transportation ticket 🚋.
English and Spanish lessons 🇬🇧 🇪🇸.
Flexible compensation plan through Cobee.
Team-building activities.
Referral program with bonuses for bringing in talented professionals.

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

Node.jsTypeScriptPythonPostgresMySQLRedisMongoDBDomain-Driven Designunit testingintegration testing

Soft Skills

mentoringcollaborationleadershipcommunicationcuriositycontinuous improvementproblem-solvingteamworkfeedbackadaptability