Back End Engineer

• Collaborate with cross-functional teams to test new ideas.
• Design reusable and performant user interfaces.
• Take operational responsibility for the components you create.
• Incorporate customer feedback for continuous product improvement., * Collaborate closely with engineers, product designers, and product to perform experiments and test new ideas.
• Build performant, design-centric, reusable and usable interfaces that solve complex needs, such as customisation possibilities for our users; complex data visualisations (graphs, charts, etc…), delightful components that provide the best platform experience.
• Drive user-defined data modelling and performance, providing the user with customization possibilities through reusable building blocks: models, variables, formulas…
• Take operational responsibility for the components that you write.
• Work in an environment that supports your individual growth, providing you with challenging tasks and projects to solve and the freedom to acquire new skills in hack time.
• Work with product and our operations team to incorporate customer feedback to constantly improve our product.
• Scale our complex data and calculations platform for a fast-growing number, size and complexity of clients.

A leading software development firm in Barcelona is seeking a Senior Back End Engineer. This role requires strong experience in Python, PostgreSQL, and Kubernetes, with a focus on creating innovative solutions for finance teams. Candidates should have a product mindset and be team players, able to collaborate effectively. The position offers a full-time contract with competitive benefits including private health insurance and a flexible vacation policy., * Strong ownership mindset and a willingness to learn quickly.

• Experience in building complex data solutions in a collaborative environment.

• A passion for developing innovative technology for finance teams., PostgreSQL Kubernetes Product mindset Team player Complex data structures Deep understanding of performance, Stack

• Python
• PostgreSQL
• Kubernetes

Methodology

• Agile/Scrum
• Data driven, * Product mindset
• Team player
• Complex data structures
• Deep understanding of performance when building and operating through observability

Bonus points if you have

• Experience with Pandas, Polars or similar DataFrames technologies
• Experience building ML and AI solutions
• Experience scaling complex data platforms

• Competitive vacation policy
• Cobee card for discounts on food and transport
• Private health insurance and access to Meditopia (wellbeing platform)
• Spanish and English language course
• Relocation support if needed and desired

Our values

• Customer Obsession: We share the understanding that Abacum’s sole purpose is to create value for customers and relentlessly deploy all creativity and energy to that end.
• Audacious Ambition: We dream big and embrace discomfort. We assume risks, make on-time mistakes and learn how to methodically accomplish our goals.
• Good People: We are self-reflective and praise diversity of thought. We don’t justify the end with the means and know where to draw the line. We have fun every day.
• Tough Love: We truly care for everyone in the team and embrace honest feedback and radical transparency as ways to genuinely help each other.

Abacum is the leading Business Planning solution for finance teams to drive performance. By automating reporting, enabling collaboration, and simplifying planning and forecasting, we help finance teams shift from number crunching to driving strategic decisions.

Founded in 2020 by two former CFOs, we’ve grown into a global team of 100+ people across 30+ nationalities. Headquartered in New York, we have offices in London and Barcelona. We’re trusted by industry leaders such as Dish Networks, Strava, BetterUp, Kajabi, JG Wentworth, Abridge, Cortex, and hundreds more.

We have raised over $100m, closing in June 2025 our $60M Series B, led by Scale Venture Partners, with the strong participation of Cathay Innovation, Y Combinator, Atomico, Creandum, and angel operators from Adyen, Zapier, and Twitch.

Our mission is ambitious and we can’t do it alone-join Abacum as we build the future of Business Planning! We are looking for

Talented engineers who possess infinite curiosity to solve complex problems not existing in the market (multi dimensional real time calculations engine), are excited to become part of our early story and help create groundbreaking technology that truly improves how finance teams work and collaborate. Creating an amazing opportunity to code in an extremely agile environment, with a direct long-term impact on our product and users.

Our ideal candidate has a strong sense of ownership in their work, is willing to learn quickly, and is committed to shaping our technical design and engineering culture.