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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Full-Stack Engineer - **Company:** ZenRows - **Location:** Bilbao, Spain (Remote available) - **Contract:** Permanent contract - **Skills:** A/B Testing, Application Programming Interfaces (APIs), Agile Methodology, BigQuery, Software as a Service, Laravel, ReactJS, Technical Debt, Backend, Vue.js, Data Analytics, Front End Software Development, Api Design - **Published:** July 2, 2026 - **Apply:** https://es.indeed.com/viewjob?jk=a87242aa3a20f2d0 ## About the Role * Have +5 years of experience as a Full-Stack/Product Engineer, ideally with exposure to growth or product engineering. * Have experience with modern frontend and backend development using React (or similar frameworks). * Understand SaaS funnels - signup, onboarding, usage, activation, conversion. * Have implemented behavioral analytics, event tracking, and activation dashboards. * Have worked with tools like Amplitude, Segment, BigQuery, or PostHog. * Are familiar with A/B testing tools and statistical analysis of experiments. * Know how to balance speed with tech debt, and can ship fast while keeping things clean. * Enjoy owning metrics and being measured by impact, not lines of code. * Communicate clearly with product, growth, and marketing teams - and thrive on feedback. * Have a strong design sensibility with experience creating polished, customer-facing interfaces that reflect brand values and marketing goals. Bonus Points If You * Have worked on activation or conversion at a B2B SaaS or API-based startup. * Can explain concepts like time-to-value, North Star metrics, or growth loops. * Have experience improving self-serve flows in technical products (developer-facing tools, APIs, dashboards). * Have worked closely with design and marketing teams to implement customer-facing solutions that drive conversion. * Demonstrate attention to detail with a portfolio that showcases pixel-perfect implementation of designs. Agile & Process-Driven Mindset * You optimize workflows, reduce bottlenecks, and improve efficiency without overcomplicating processes. * You understand the Pareto principle (80/20 rule) and prioritize high-impact work over perfection. * You are used to working with multidisciplinary teams and balancing engineering, business, and product needs. Strong Product & Business Awareness * You have world-class product sense and can prioritize engineering efforts based on business impact. Transparency & Collaboration * You thrive in open, honest communication and ensure visibility across teams. * You can handle strong opinions from technical founders and have the guts to say no when needed, while gathering input from multiple stakeholders. * Excellent communication skills, with the ability to convey complex technical concepts to non-technical stakeholders. Why you will love working here… ## Description We're looking for a Full-Stack Engineer to join our GTM (Go To Market) Activation team - a cross-functional group focused on increasing signup, integration, trial usage, and time-to-value for new users. Your job is to work at the intersection of engineering, growth, and product, building everything from onboarding flows and self-serve dashboards to usage analytics, activation nudges, and backend services that guide users toward value - faster. This team sits at the heart of our Go-To-Market engine. You'll directly influence conversion and retention by reducing friction and turning passive signups into active users. We're a remote-first company with a fast-paced, high-impact culture. In this role, you'll work closely with our CEO, Aurken, and our Director of Engineering. And as a business with two technical founders who have strong engineering backgrounds - you must be comfortable engaging in technical discussions while balancing business needs., Build for Growth * Ship full-stack features across the activation funnel: onboarding UI, guides, wizards, checklists, in-app messaging, and dashboards. Our tech stack: Laravel, Vue * Own backend services and APIs that support analytics, tracking user progress, and onboarding personalization. * Build self-serve capabilities (API explorers, data previews, sandbox flows) that increase integration rates. Data & Instrumentation * Implement robust event tracking using tools like Segment, Amplitude, BigQuery, and PostHog. * Collaborate with Product and Growth to define and instrument key activation metrics. * Work with analysts to surface insights and user segments for better targeting. Experimentation & Optimization * Run A/B tests and iterative experiments to improve signup, activation, and trial conversion. * Based on usage data, build and test UX variations, email triggers, and behavioral nudges. * Instrument cohort-based analysis to identify drop-offs and quick wins. Cross-Functional Collaboration * Partner with Product, Marketing, Sales, and Support to identify blockers and opportunities across the funnel. * Act as a technical bridge between user-facing teams and the internal analytics tools. * Help craft a frictionless developer experience from signup to first value. Engineering Best Practices * Write clean, maintainable, and performant full-stack code. * Ensure smooth deployment and observability of new features (logs, alerts, error tracking). * Maintain high standards for privacy, compliance, and security., We're looking for a builder obsessed with user onboarding, experimentation, and removing friction. You're a data-driven engineer who understands product goals and loves seeing your work directly impact metrics that matter. ## Related Videos - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [The Laravel Core - Demystify The Beast](https://www.wearedevelopers.com/videos/98-the-laravel-core-demystify-the-beast) - [Lessons learned from building a thriving Vue.js SaaS application](https://www.wearedevelopers.com/videos/1666-lessons-learned-from-building-a-thriving-vue-js-saas-application) - [Recruitment Reinvented: Bold strategies and the $10K signing incentive](https://www.wearedevelopers.com/videos/1068-recruitment-reinvented-bold-strategies-and-the-10k-signing-incentive) - [API Platform: From Rest & GraphQL APIs to state-of-the-art standards in seconds](https://www.wearedevelopers.com/videos/1968-api-platform-from-rest-graphql-apis-to-state-of-the-art-standards-in-seconds) - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Spanish Business Culture and Etiquette](https://www.wearedevelopers.com/magazine/353-spanish-business-culture-and-etiquette) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Mastering Remote Work: Tips for Developers](https://www.wearedevelopers.com/magazine/558-mastering-remote-work-tips-for-developers)