JavaScript Software Engineer (React / Node.js / React Native)
Wałbrzyska 11, Warszawa
Algoteryx
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
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.
JavaScript Software Engineer (React / Node.js / React Native)
JavaScript Software Engineer (React / Node.js / React Native)
Wałbrzyska 11, Warszawa
Algoteryx