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# Senior Backend Engineer (Ai Saas)

- **Company:** Landbot
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Microsoft Azure, Software as a Service, Cloud Computing, Relational Databases, Distributed Systems, Python (Programming Language), PostgreSQL, MongoDB, MySQL, Node.Js, NoSQL, Redis, TypeScript, Technical Debt, Backend, Software Coding, Domain Driven Design, Data Pipelines
- **Published:** July 29, 2026
- **Apply:** https://www.buscojobs.com.es/senior-backend-engineer-ai-saas-en-madrid-ID-364372276

## About the Role

You're fluent in modern backend stacks (e.g., Node.js, TypeScript, Python) and have experience with relational databases (Postgres, MySQL) as well as NoSQL systems like Redis, MongoDB
Passionate about testing everything: unit, integration, performance, quality is your compass
Obsessed with continuous improvement: you seek feedback, give constructive feedback, and raise the bar for yourself and others
Proven experience building web applications at scale and working with distributed systems
You're curious about how to bring AI models into production systems, from integrating APIs to optimizing performance and reliability
Hands-on experience operating services in production environments, with knowledge of cloud infrastructure (GCP, AWS, or Azure)
You thrive in collaborative environments, value feedback, and help others raise the bar
We require eligibility to work in Spain and are also open to collaboration agreements
Experience with AI/ML APIs, vector databases, or data pipelines is a plus, but above all you bring a mindset of building products where AI becomes a core capability
You're comfortable working with complex backend stacks and architectural approaches (e.g., Domain-Driven Design), knowing when to leverage them to bring clarity and scalability-and when to avoid dogmatic application that slows delivery
Fluent in English and Spanish
You're passionate about your craft, the product, and the impact we create for our customers

## Description

ResponsibilitiesAt Landbot, we're building a high-performance team that blends engineering excellence, product mindset, and customer obsession.We believe quality and speed go hand in hand - and we're looking for a Senior Backend Engineer to help us scale our platform and deliver real impactAs a Backend Engineer, you will combine hands-on coding with the responsibility of guiding your team's technical direction and execution.Your role is to ensure that the solutions we build are scalable, maintainable, and aligned with Landbot's missionEmbodying our values, energy, and attitude,Translating product requirements into clear technical strategies,Fostering engineering excellence and growth in your teammates,And keeping the team united, motivated, and focused on building meaningful impact for our usersYou won't lead by spotlight or authority, but by example, care, and clarity-helping the team grow week after week, keeping its identity alive, and strengthening its soulPartner with Product to turn business goals into clear technical strategies and plansGuide technical decisions balancing short-term impact with long-term sustainabilityDesign & evolve systems that scale with traffic, data complexity, and AI-driven use casesWrite clean, maintainable code while continuously improving practices and qualityMentor and support your team, leading by example in code, reviews, and collaborationSafeguard delivery pace: reduce blockers, manage technical debt, and keep flow sustainableYou bring a product engineering mindset: your focus is always on building quality features that create real valueYou think beyond code: always asking "Is this important? Does it improve the customer's life? Does it reduce costs or unlock new opportunities?"Stay close to the user: deeply understand who they are, their problems, frustrations, and behaviors.Great engineers don't just write code - they connect technology to real people, ensuring our work creates meaningful impact in the market and in users' livesYou balance speed and quality: knowing that quality isn't the opposite of agility but its foundationYou lead through ownership and autonomy, ready to make an impact both in the product and in the teamYou foster collaboration, feedback, and learning, because great teams outperform brilliant individualsAct as a bridge across teams: communicate risks, trade-offs, and timelines with stakeholders in a clear, constructive wayManage technical debt: make it visible, measurable, and actionable, creating structured repayment plans that align with business prioritiesBenefitsLive and work in sunny BarcelonaFriday happy hours and after hour weekly team meetingsFlexible holidays so you can take time off when you need itBonus transport tickets, educational content and all you need to feel empoweredReferral Bonus if you bring other talented people like youMacBooks are our standard, but we're happy to get you whatever equipment to get your job doneGreat culture & working atmosphereHybrid cultureQualificationsYou're fluent in modern backend stacks (e.g., Node.js, TypeScript, Python) and have experience with relational databases (Postgres, MySQL) as well as NoSQL systems like Redis, MongoDBPassionate about testing everything: unit, integration, performance, quality is your compassObsessed with continuous improvement: you seek feedback, give constructive feedback, and raise the bar for yourself and othersProven experience building web applications at scale and working with distributed systemsYou're curious about how to bring AI models into production systems, from integrating APIs to optimizing performance and reliabilityHands-on experience operating services in production environments, with knowledge of cloud infrastructure (GCP, AWS, or Azure)You thrive in collaborative environments, value feedback, and help others raise the barWe require eligibility to work in Spain and are also open to collaboration agreementsExperience with AI/ML APIs, vector databases, or data pipelines is a plus, but above all you bring a mindset of building products where AI becomes a core capabilityYou're comfortable working with complex backend stacks and architectural approaches (e.g., Domain-Driven Design), knowing when to leverage them to bring clarity and scalability-and when to avoid dogmatic application that slows deliveryFluent in English and SpanishYou're passionate about your craft, the product, and the impact we create for our customers#J-*****-Ljbffr


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