Senior Front End Engineer

Reposted Yesterday
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Barcelona, Cataluña, ESP
Hybrid
Senior level
Software
The Role
Build performant, reusable frontend interfaces for complex finance and business-planning workflows, including data visualizations, customization tools, modeling components, and real-time calculations. Collaborate with product, design, operations, and engineering teams; incorporate customer feedback; optimize data structures and application performance; maintain observability; and take operational ownership of developed components.
Summary Generated by Built In

About Abacum

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 Toronto 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...

We’re looking for a talented Senior Frontend Engineer with boundless curiosity to solve complex, market-defying challenges—like building a multidimensional real-time calculations engine!

Join us early in our journey to create groundbreaking technology that transforms how finance teams work and collaborate. This is a unique opportunity to code in an extremely agile environment, make a direct long-term impact on our product and users, and help shape our technical design and engineering culture.

If you take ownership in your work, learn quickly, and are ready to be part of something extraordinary, we want to hear from you!

Being a Software Engineer at Abacum means...

  • 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 modeling 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 by 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 in order to constantly improve our product

You can easily check off…

Stack
  • TypeScript

  • React (or strong experience in other UI frameworks)

  • Redux

  • SCSS/CSS-in-JS

  • Jest/Playwright

Methodology
  • Agile/Scrum

  • Data driven

Skills
  • Strong knowledge of JavaScript, asynchronous programming, closures, types, and ES6.

  • Ability to solve complex product problems with optimized data structures and best practices

  • Product mindset

  • Team player

  • Deep understanding on performance when building and operating through observability

Bonus Points if you have...
  • Experience with backend programming languages (Python, NodeJS, GO or Ruby are preferred) and RESTful API creation

  • Database systems knowledge (PostgreSQL and MySQL are preferred)

  • Experience with Pandas, Polars or similar DataFrames technologies

Benefits

  • Competitive compensation including equity package

  • Competitive vacation policy

  • Medical Insurance

  • L&D budget

  • Access to Meditopia (wellbeing platform)

  • Language courses (English / Spanish)

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 candor as ways to genuinely help each other.

Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender perception or identity, national origin, age, marital status, protected veteran status, or disability status.

Skills Required

  • Strong knowledge of JavaScript, asynchronous programming, closures, types, and ES6
  • Experience with TypeScript
  • Experience with React or strong experience with another UI framework
  • Experience with Redux
  • Experience with SCSS or CSS-in-JS
  • Experience with Jest or Playwright
  • Ability to solve complex product problems using optimized data structures and best practices
  • Strong performance optimization and observability knowledge
  • Product mindset and ability to work effectively as a team player
  • Experience with backend programming languages such as Python, Node.js, Go, or Ruby
  • Experience creating RESTful APIs
  • Knowledge of PostgreSQL or MySQL
  • Experience with Pandas, Polars, or similar DataFrame technologies

Abacum Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Abacum and has not been reviewed or approved by Abacum.

  • Healthcare Strength Private medical, dental, and vision insurance plus mental-health support are explicitly listed on the careers page, with employer-verified health and dental coverage shown on Glassdoor. This establishes a robust core health offering for a growth-stage startup.
  • Leave & Time Off Breadth “Generous PTO,” sick leave, and paid holidays are highlighted in company materials and reflected in employer-verified benefit categories. This points to strong time-off fundamentals alongside flexibility.
  • Equity Value & Accessibility Compensation materials emphasize “meaningful equity,” and stock options are listed as employer-verified. Public role pages also reference standard equity structures, underscoring broad access to ownership.

Abacum Insights

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The Company
HQ: New York, New York
165 Employees
Year Founded: 2020

What We Do

Abacum is the AI-native FP&A platform that automates, analyzes, and forecasts for strategic impact. End the spreadsheet struggle. Drive business results through the most scalable Financial Planning Solution We empower finance teams to: 👉Drive efficient growth with faster revenue forecasts, scenarios and headcount planning. 👉Free up time by automating Board decks and monthly performance and reforecasting reports. 👉Increase your time for analysis with all your operational and financial KPIs in one place, in real-time. 👉Drive budget owner accountability with structured workflows. Experience the power of automated FP&A with Abacum.

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