# Senior Software Engineer: React at WhyHireWrong?

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Build and maintain platform-level toolin

- **Company:** WhyHireWrong? (https://jobs.trythestack.co/companies/whyhirewrong)
- **Location:** Barcelona, ES, Spain
- **Work arrangement:** On-site
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Salary:** EUR 75,000–90,000 per year (as stated by the employer)
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** 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
- **Posted by employer:** 2026-03-11
- **Added to The Stack:** 2026-05-22
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://whyhirewrong.teamtailor.com/jobs/7367525-senior-software-engineer-react (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/senior-software-engineer-react-whyhirewrong

## 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.

## FAQ

- **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.

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