Backend Engineer

Flanks is looking for a Backend Engineer to design and maintain the data pipelines and backend services powering their Open Wealth Platform.

💸 €35,000 - €50,000 gross/year

📍 Barcelona (Hybrid, office near Sants Estació / Plaça Espanya)

✨ Health insurance, 50% subsidised digital canteen, yearly training budget, birthday day off

A little bit about Flanks 🚀

Flanks is shaking up the wealth management industry by making it simpler and way more efficient for financial institutions. Our SaaS platform is designed to help banks, family offices, and wealth managers get a full picture of their clients' financial assets—all in one place. 💼💡

Founded in 2019 and based in Barcelona, we've brought together a team of passionate wealth management and tech pros, all with a shared goal: to change how wealth management is done. Backed by €23 million in investment, we're growing fast, and we're not stopping anytime soon! 📈🔥

What we stand for:

• People First 🤝 – our team comes first. We want every Flanker to feel at home, engaged, and part of something bigger.
• Keep Growing 🌱 – as the company grows, so should you. We're all about personal and professional development here.
• Think Twice, Act Once 🧠💭 – we believe in thoughtful decisions, considering the impact on both our team and our clients before taking action.

If you're looking for a place where you can grow and make an impact at a fast-paced, exciting fintech startup, this might just be the place for you! 🎯✨

About the role 💼

As a Mid-Level Backend Engineer on our Tech Team, you will design, build, and optimize the data pipelines and backend services that keep clean, reliable data flowing across the entire organization. You will own the full lifecycle of data ingestion and transformation work — from understanding a business requirement through to production deployment — and directly shape the backend infrastructure that powers our data-driven decision-making at Flanks.

What you'll do 🛠️

Here's what you can expect to work on:

• Design, develop, and maintain scalable ETL/ELT pipelines to ingest, transform, and load data from multiple disparate sources into our core systems.
• Write clean, efficient Python code with a strong focus on performance — applying optimal data structures and algorithms to handle high-volume datasets reliably.
• Collaborate on database schema design (SQL and NoSQL) and own query performance optimization to ensure fast, accurate data access.
• Implement unit tests, integration tests, and data quality checks to guarantee pipeline integrity and catch issues before they reach production.
• Deploy and iterate on pipelines using CI/CD practices and containerization tools such as Docker, participating actively in code reviews to uphold team standards.

What we'd love to see 😍

• Strong Python engineering skills with a focus on performance, memory efficiency, and writing maintainable, production-grade code.
• Solid experience building and operating data pipelines — ETL/ELT patterns, pipeline orchestration, and handling large-scale data ingestion.
• Familiarity with both SQL and NoSQL databases, including schema design and query optimization.
• Comfort working autonomously — able to take a high-level requirement, define scope, and drive it to production without heavy hand-holding.
• Ability to navigate unfamiliar codebases quickly and contribute meaningfully from an early stage.
• Experience with CI/CD workflows and containerization (Docker or similar).
• Language Proficiency: Professional proficiency in both English and Spanish to collaborate effectively in our bilingual environment 🗣️.

If this sounds like you, don't worry if you don't check every single box—we'll support your growth along the way. 🚀🙌

What we offer 🎁

• A full-time, permanent contract. 📃
• A salary range of €35,000 – €50,000 gross per year, based on experience. 💰
• A cool office between Sants Estació and Plaça Espanya with stunning views of Barcelona. 🏙️✨
• Flexible working hours and hybrid work options. ⏰
• Paid day off on your birthday. 🎂🎉
• Weekly fresh fruit, coffee, and tea on tap. 🍎🍵
• Friday happy hours after our all-hands meetings (totally optional, of course!). 🍻🥳
• Team-building events to bond and have fun. 🎈🤝
• Health insurance and flexible compensation with Alan. 🏥💸
• A digital canteen, thanks to Kombo, subsidised at 50%. 🍽️😋
• A yearly training budget to keep growing. 📚📈

The hiring process ⚙️

1. Apply through JobFluent portal
2. You'll have a chat with our People Business Partner, Nicolás Guilarte. 💬
3. A meeting with César Benítez and the Tech Team.
4. A technical test. 🖥️
5. Final interview to review the technical test and iron out any remaining questions. 🤔
6. We send you an offer! 💌

We aim to keep things moving fast—ideally wrapping things up in one to four weeks. ⏳💨

If this sounds like a good fit for you, we'd love to hear from you.

At Flanks, we believe in fostering diversity and inclusion across everything we do. We're proud to be an equal opportunity employer, and we welcome all applications regardless of race, religion, gender, age, or disability status. 🌈💼

Additionally, we have an Equality Plan in place to ensure fairness and inclusivity in all our policies and practices. 💙

About JobFluent

ES - ¿QUÉ SOMOS?

JobFluent es un híbrido entre una plataforma de empleo tecnológico de calidad y un equipo de asesores que te ayudan a crecer en tu carrera. Nuestro objetivo es que la vida de nuestros usuarios cambie a mejor y que el proceso de cambio (normalmente estresante) sea lo más FLUIDO y agradable posible.

Somos conocidos por:️

Trato humano: nuestro equipo siempre está preparado para ayudarte de forma honesta y personalizada.

Sin spam: primero te escuchamos y sólo después te sugerimos oportunidades relevantes y validadas que encajen con tus intereses e inquietudes.

Acompañamiento: te damos consejos y te apoyamos durante todo el proceso de selección para aumentar tus probabilidades de éxito.

Experiencia del candidato: esto es lo que nos mueve! Nos rebelamos contra la falta de feedback y otras malas prácticas demasiado habituales en nuestro mundo.

EN - WHO WE ARE

JobFluent is a hybrid between a quality tech job platform and a team of advisors who help you grow your career. Our goal is to make our users' lives change for the better and to make the (usually stressful) job search process as FLUENT and enjoyable as possible.

We are known for:️

Human treatment: our team is always ready to help you in an honest and personalized way.

No spam: first we listen to you and only then do we suggest relevant and validated opportunities that match your interests and concerns.

Coaching: we give you advice and support you throughout the selection process to inc rease your chances of success.

Candidate experience: this is what drives us! We rebel against the lack of feedback and other bad practices that are all too common in our world.