JavaScript Software Engineer (React / Node.js / React Native)

16 - 38 USDNet per hour - B2B
JavaScript

JavaScript Software Engineer (React / Node.js / React Native)

JavaScript

Wałbrzyska 11, Warszawa

Algoteryx

Full-time
B2B
Mid
Remote
16 - 38 USD
Net per hour - B2B

Tech stack

    TypeScript

    advanced

    Software Development

    advanced

    React

    advanced

    React Native

    regular

    Expo

    junior

    Azure

    nice to have

Job description

We’re building a fintech platform that’s shaping the future of gig apps — and we’re looking for a Full Stack JavaScript Engineer to join us. You’ll help us deliver modern web and mobile experiences, integrate with external services, and push forward a system designed for scale and impact.


What you’ll work on

  • Building and maintaining React (TypeScript) web applications.

  • Developing React Native mobile apps with modern libraries and tools (Expo, React Navigation, Reanimated, Redux Toolkit, React Query).

  • Designing and implementing Node.js/Express backends with integrations (REST, WebSockets, Firebase, Azure services).

  • Working with MongoDB and other data storage solutions.

  • Collaborating on performance monitoring, error tracking, and analytics (Firebase, Crashlytics, Azure Monitor, OpenTelemetry).

  • Creating scalable and maintainable codebases with testing, CI/CD, and clean architecture principles.

Must-have skills

  • Strong experience in React (TypeScript), React Native and Node.js.

  • Solid understanding of the React Native ecosystem.

  • Knowledge of modern state management (Redux Toolkit, React Query) and form handling (React Hook Form, Zod).

  • Experience with REST APIs, authentication (JWT, OAuth), and common libraries (Axios, i18next).

  • Familiarity with Git workflows, package managers, and monorepo setups.

Good to have

  • Azure Cloud (Identity, Key Vault, Storage, Monitor, Functions, etc.).

  • Hands-on experience Expo ecosystem (EAS build, update, submit) as well as preparing, publishing and maintaining mobile apps in Google Play and App Store.

  • MongoDB, Express, and microservices patterns.

  • Data visualization (D3, MUI X Charts, Skia, Calendars).

  • Knowledge of performance profiling, error boundaries, and accessibility.

  • Vue.js (legacy project maintenance).

Who you are

  • 3–6+ years of professional experience in full stack JavaScript/TypeScript development.

  • Comfortable switching between frontend, mobile, and backend tasks.

  • Curious and proactive about new technologies in the JS ecosystem.

  • Someone who enjoys a strong engineering culture where solving problems is fun.

Why join us

  • Work with modern stacks across web, mobile, and backend.

  • Exposure to Azure cloud projects and large-scale distributed systems.

  • Opportunity to shape architecture and influence technical decisions.

  • Strong engineering culture where solving problems is fun, not painful.

  • Flexible working setup and supportive team culture.

  • Ability to work remote

Published: 15.09.2025

Meet the company

Algoteryx

Algotery is a software house built on engineering excellence and innovation. We craft high-quality fintech solutions with a strong focus on precision, scalability, and reliability. Our culture is driven by curiosity, craftsmanship, and a passion for building technology that lasts.

Company profile
Office location

JavaScript Software Engineer (React / Node.js / React Native)

16 - 38 USDNet per hour - B2B
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JavaScript Software Engineer (React / Node.js / React Native)

Wałbrzyska 11, Warszawa

Algoteryx

16 - 38 USDNet per hour - B2B
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