Senior Software Engineer: React at WhyHireWrong?

✨ The Stack take on this WhyHireWrong? job

• 🏢 WhyHireWrong? has 3 jobs here, 3 with visa sponsorship see all
• 🛂 Visa: Highly Qualified Professional permit. Education: Higher education degree guide

Updated 2026-11-05, from our data and official sources.

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About the role

Responsibilities:
- Build and maintain platform-level tooling and frameworks used by web and mobile product teams (shared component libraries, SSR, build tooling).
- Lead migration efforts (e.g., Next.js adoption) and expand React Native usage across the codebase while ensuring compatibility and performance.
- Author and maintain cross-platform, hybrid-first components that work on web and React Native.
- Define and evangelize technical standards, testing practices, and observability patterns across the engineering organisation.
- Improve the design-to-engineering handoff, raise code quality, and reduce friction in delivery pipelines.
- Mentor and coach engineers, contribute to the technical roadmap, and drive platform decisions without a dedicated PM.

Requirements:
- 7+ years professional software development experience with deep expertise in React and React Native.
- Strong experience building and maintaining reusable frontend design systems and component libraries.
- Hands-on experience with Next.js, SSR architecture, and large-scale migrations across broad codebases.
- Rigorous automated testing mindset (React Testing Library) and commitment to observability, monitoring, and logging.
- Proven ability to define practical technical standards and to mentor other engineers effectively.
- Comfortable working in a fast-shipping environment (frequent small releases) and balancing polish vs. shipping, with hybrid presence in Barcelona (office days as specified).

Responsibilities

Build and maintain foundational tooling, shared component libraries, and SSR architecture for high-traffic web and mobile applications. Drive the technical roadmap and define engineering standards to improve the design-to-engineering handoff and overall code shipping efficiency.

Requirements

Requires 7+ years of professional software development experience with deep expertise in React, React Native, and reusable frontend libraries. Candidates must have a strong background in automated testing, large-scale technology migrations, and mentoring junior engineers.

Key skills

• React — in 277 other listings on The Stack
• React Native — in 34 other listings on The Stack
• Next.js — in 63 other listings on The Stack
• JavaScript — in 141 other listings on The Stack
• Component Driven Design — not in any other listing on The Stack
• Frontend Design Libraries — not in any other listing on The Stack
• Automated Testing — in 77 other listings on The Stack
• Technical Roadmap Planning — in 1 other listing on The Stack
• Mentoring
• Observability
• Webpack
• TypeScript
• SSR Architecture
• Cross-platform Development
• Code Quality
• Technical Standards

On The Stack (as of 2026-11-05)

• WhyHireWrong? has 2 other listings on The Stack, 2 of them marked as offering visa sponsorship.
• 76 visa-sponsored jobs in Spain on The Stack, posted in the last 60 days.
• 195 visa-sponsored software engineer jobs in Europe on The Stack, posted in the last 60 days.

Frequently asked questions about WhyHireWrong?

Is this Senior Software Engineer: React role still open?

It was posted on 2026-03-11. Listings more than 30 days old may no longer be active, so check WhyHireWrong?'s site before applying.

Does WhyHireWrong? offer visa sponsorship?

This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on WhyHireWrong?'s site.

Where is this role located?

The listing gives the location as Barcelona, ES, Spain. It is marked on-site.

What is the salary for this role?

The listing states a salary of EUR 75,000–90,000 per year.

What skills does this role ask for?

The listing names: React, React Native, Next.js, JavaScript, Component Driven Design, Frontend Design Libraries, Automated Testing, Technical Roadmap Planning, Mentoring, Observability, Webpack, TypeScript, SSR Architecture, Cross-platform Development, Code Quality, Technical Standards.