Senior React Native Developer

Assertis Ltd; Remote; PLN 180,000 - 240,000; Full time

Job summary

A leading software development company is seeking a Senior React Native Developer to lead a greenfield mobile project for iOS and Android. This role involves building and shipping a production app, making technical decisions, and collaborating with frontend and backend teams. The ideal candidate will have strong React Native experience and the ability to communicate effectively in English. This position offers a 100% remote work environment, semi-flexible hours, a B2B contract, and various benefits including a training budget.

Benefits

Long-term role

Continuous learning and improvement focus

Equipment provided

Conference budget

Small team environment

Qualifications

• Strong React Native experience with shipped apps on both iOS and Android.
• Comfortable communicating in English for daily collaboration.
• Ability to build high-quality mobile experiences.

Responsibilities

• Build and ship a production React Native app from scratch.
• Own technical decisions on architecture and tooling.
• Collaborate on shared design systems and API integration.

Skills

React Native experience

Ability to build polished mobile experiences

English communication

Tools

Jira

Confluence

GitLab

GIT

Job description

Assertis is a profitable, privately‑owned company building software for public transport — journey planning, rail ticket retailing, and real‑time information. We've been around for 25 years: lean, product‑focused, and growing.

Our APIs handle over 1 million journey searches daily and sell £200m worth of UK train tickets each year — about 5% of all train tickets sold online in the UK. We compete successfully with much larger companies and are well‑known for driving innovation in the rail industry.

We're a distributed team across the UK, Poland, and Italy. On average, our technical team members have been with us for five years. We value autonomy, accountability, and collaboration.

Senior React Native Developer @ Assertis Ltd

Polska

What we're building

Now we're building a new mobile app — a greenfield React Native project for iOS and Android. We're looking for an experienced React Native developer to lead this build. You'll be hands‑on writing code daily while working closely with our frontend team (two React developers and a designer), backend developers, and testers to create a consistent, high‑quality experience across web and mobile.

What you'll do

• Build and ship a production React Native app from scratch
• Own technical decisions on architecture, tooling, and patterns
• Collaborate with the existing frontend and backend teams on shared design systems and API integration
• Work directly with our in‑house API — no third‑party guesswork

What we're looking for

• Strong React Native experience with shipped apps on both iOS and Android
• Ability to build polished, performant mobile experiences
• Comfortable communicating in English — daily collaboration happens in English across a distributed team

We're not counting years of experience. Show us you can build good apps.

What we offer

• Long‑term role — we're building for the future, with a focus on continuous learning and improvement
• 100% remote, anywhere in Europe
• Semi‑flexible hours
• B2B contract, 20, 000–25, 000 PLN/month
• Equipment provided
• Conference budget
• Small team where you're close to decisions and have real impact on how things are built

Requirements

• React Native tools: Jira, Confluence, GitLab, GIT
• Training budget
• Flat structure