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Senior Full Stack Developer, Barcelona
Jordan martorell s.l.Barcelona, Cataluña, EspañaHace 3 días
Descripción del trabajoThrive in fast-paced, ambiguous environments, are energized by change, and can prioritize on the fly. Have expert front-end skills : CSS, responsive layouts, animation libraries (Framer Motion, GSAP), React, Next.js. Understand the CMS landscape : experience with large CMS-driven sites (DatoCMS, Contentful, Sanity), migrations, and balancing structure with flexibility. Think like a growth manager and build like an engineer : care about user behavior, performance, analytics, and experiment velocity, along with clean code and the bigger business picture. Communicate clearly across functions, engaging with designers, marketers, and backend engineers. Mentor others, value documentation, constructive feedback, and leading by example. Have a proactive, get-it-done attitude, willing to prototype and patch quickly. Experience working on or refactoring design systems. Familiarity with backend development (Rails, PHP, or other CMS templating systems). Experience with WebGL, Canvas, or advanced creative coding. Knowledge of data analysis and A / B testing tools (Google Optimize, Segment, Amplitude). Work in a cross-functional Growth team where experimentation guides our operations. Own projects from idea to deployment with freedom to propose, validate, and measure. Collaborate with designers, marketers, and content creators in a high-growth, product-led environment. Join a team that values learning, autonomy, and psychological safety—no blame, no ego, just building great stuff together. High-growth, multicultural, friendly environment Continuous training and learning tailored to your needs Alan private health insurance Access to Wellhub (gyms, pools, outdoor classes) Save expenses with Cobee Language classes with Preply Maximize your salary with Payflow Breakfast and organic fruit Nora and ApetEat discounts Pet-friendly policies
Senior Full Stack Developer
Hello!
At Factorial, we're looking for a Full-Stack Senior Software Developer to help us elevate the company to the next level.
Are you ready to be part of the challenge?
Help us increase MRR.
Our Growth Marketing team drives experimentation and innovation to discover new distribution channels, optimize our acquisition funnel, and enhance lead quality and volume. We support over 100 stakeholders across content, SEO, events, partnerships, paid media, and more.
We seek a Senior Developer who thrives in ambiguity, moves quickly, and balances high-impact growth experiments with strategic, long-term improvements such as evolving our CMS and scaling our web platform.
The annual salary range for this position is $51,000 to $70,000.
What You'll Do
- Lead front-end implementation for growth experiments across our marketing website and acquisition funnel—build, test, validate, iterate.
- Modernize our CMS integration (DatoCMS) to support scalable, flexible content structures, evolving away from legacy limitations and enabling better workflows for both developers and non-developers.
- Collaborate with Marketing and other teams to create high-quality, fast-performing, visually compelling pages and campaigns, including animations, interactions, and mobile-first execution.
- Mentor developers, advocate for quality, and raise the technical bar through communication, documentation, and reviews. Partner with another senior developer and work with mid-level developers and product designers.
- Support internal teams by building reusable components, scalable templates, and internal tooling to improve efficiency and autonomy for over 100 stakeholders.
- Own experiments from code to data : define success metrics, integrate tracking, analyze outcomes, and iterate based on learnings.
- Maintain high performance standards to deliver excellent Core Web Vitals scores while supporting engaging UI / UX solutions.
You'll Be a Great Fit If You
Bonus Skills
We encourage you to apply regardless of whether you meet all these skills. We hire for talent.
Why You'll Love Working Here
Benefits
We care about our people and offer many benefits :
And at the office :
Required skills include React, CSS, Next.js.
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Developer Barcelona • Barcelona, Cataluña, España
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