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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Front End Engineer - **Company:** Abacum - **Location:** Barcelona, Spain - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), ARM Architecture, Cascading Style Sheets (CSS), Databases, Data Structures, ECMAScript, Python (Programming Language), PostgreSQL, MySQL, Node.Js, Scrum Methodology, Ruby, TypeScript, ReactJS, Ios Frameworks, Zapier, Pandas, Playwright, Front End Software Development, React Redux, Asynchronous Programming, Restful APIs, Golang - **Published:** September 6, 2026 - **Apply:** https://www.buscojobs.com.es/senior-front-end-engineer-en-barcelona-ID-369719912 ## About the Role 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 ## Description About AbacumAbacum is the leadingBusiness 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 **** by two former CFOs, we've grown into a global team of100+ peopleacross30+ nationalities. Headquartered inNew York, we have offices in Toronto and Barcelona. We're trusted by industry leaders such asDish Networks, Strava, BetterUp, Kajabi, JG Wentworth, Abridge, Cortex, and hundreds more.We have raised over $100m, closing in June **** our$60M Series B, led by Scale Venture Partners, with the strong participation ofCathay 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 ideasBuild 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 experienceDrive 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 writeWork 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 timeWork with product and our operations team to incorporate customer feedback in order to constantly improve our productYou can easily check off...StackTypeScriptReact (or strong experience in other UI frameworks)ReduxSCSS/CSS-in-JSJest/PlaywrightMethodologyAgile/ScrumData drivenSkillsStrong knowledge of JavaScript, asynchronous programming, closures, types, and ES6.Ability to solve complex product problems with optimized data structures and best practicesProduct mindsetTeam playerDeep understanding on performance when building and operating through observabilityBonus Points if you have...Experience with backend programming languages (Python, NodeJS, GO or Ruby are preferred) and RESTful API creationDatabase systems knowledge (PostgreSQL and MySQL are preferred)Experience with Pandas, Polars or similar DataFrames technologiesBenefitsCompetitive compensation including equity packageCompetitive vacation policyMedical InsuranceL&D budgetAccess to Meditopia (wellbeing platform)Language courses (English / Spanish)Our ValuesCustomer 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.#J-*****-Ljbffr ## Related Videos - [Frontend Abstractions: Frameworks and Applications Architectural Patterns](https://www.wearedevelopers.com/videos/2066-frontend-abstractions-frameworks-and-applications-architectural-patterns) - [Go with the Flow: Stop the Leaks Before Your Memory's a Waterfall!](https://www.wearedevelopers.com/videos/100073-go-with-the-flow-stop-the-leaks-before-your-memory-s-a-waterfall) - [MySQL Protocol Features You Should Be Aware Of](https://www.wearedevelopers.com/videos/100267-mysql-protocol-features-you-should-be-aware-of) - [Coffee with Developers: David Heinemeier Hansson](https://www.wearedevelopers.com/videos/875-coffee-with-developers-david-heinemeier-hansson) - [Scoring 2000 Products per Request: Performance Pitfalls in Golang](https://www.wearedevelopers.com/videos/2073-scoring-2000-products-per-request-performance-pitfalls-in-golang) - [Coding for Good: Achieving social change with an app](https://www.wearedevelopers.com/videos/1645-coding-for-good-achieving-social-change-with-an-app) ## Related Articles - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [Dev Digest 133 - Back to Front](https://www.wearedevelopers.com/magazine/474-dev-digest-133-back-to-front) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [Dev Digest 131 - AI'm not sure about OSS](https://www.wearedevelopers.com/magazine/472-dev-digest-131-ai-m-not-sure-about-oss)