Senior Full-Stack Engineer

We’re looking for a Senior Full-Stack Engineer to join our team.

Work Location: Poland (Krakow), Slovakia (Kosice) or Czechia (Prague). Hybrid: 2+ days per week in the office, the rest remote.

The Mission

We are building a complex, real-time ecosystem for micromobility and logistics systems sim—where split-second logistics meet seamless user experiences. We need a Full Stack powerhouse to lead the development of our Customer Mobile Web App and our high-utility Internal Admin Panels.

You’ll be the bridge between the sleek, high-performance interface our users see and the robust, scalable Python services that power the logic.

Key Responsibilities

Mobile-First Frontend: Architect and scale our React-based mobile web application, ensuring 60fps performance and offline-first capabilities.

Operational Control Centers: Build dense, data-heavy Admin Panels that allow our operations team to monitor real-time logistics, manage users, and handle complex dispatching.

Scalable Backend: Design and maintain performant APIs using Python (FastAPI/Django) to handle high-concurrency event streams.

End-to-End Ownership: From database schema design to CSS transitions, you’ll own the entire feature lifecycle.

Who You Are

The Architect: You don’t just “write code”; you design systems. You understand how a change in a Python microservice ripples out to the React frontend.

UX Enthusiast: You understand that an Admin Panel requires different UX “muscle” (efficiency and density) than a mobile app (simplicity and speed).

Problem Solver: You’ve dealt with the "hard stuff“—real-time GPS tracking, race conditions in booking logic, or complex state management.

Pragmatist: You balance the need for clean, tested code with the reality of shipping features in a fast-paced environment.

Will be a plus Led transformation of standalone product into scalable SaaS platform.

Why Join Us?

Work on a product with immediate, real-world impact.

A “no-red-tape” environment where your architectural decisions stick.

Interested? Let’s talk! Join Bluefield Technologies and be part of something new.

Layer Technology

Frontend — React Native Expo, Styled Components, Mobx/Redux, WebSockets. Experience with Firebase, Expo SDK, Expo Modules.

Backend- Python (FastAPI / Django / Flask).

Database — PostgreSQL, Redis (for real-time caching)

Infrastructure — AWS/GCP, Docker, Kubernetes

Real-time- WebSockets / Socket.io (for “Uber-style” live tracking)

Requirements & Skills

• React Native Expo production experience shipping consumer mobile apps.
• Strong JavaScript/TypeScript (prefer TypeScript) with clean, maintainable component architecture.
• Deep knowledge of React fundamentals: hooks, context, memoization, rendering performance.
• Experience building map-based UI: react-native-maps / MapView, markers, polylines/routes, camera control.
• Implement real-time UX patterns: live location tracking, periodic updates, state synchronization.
• Expertise in navigation: React Navigation (deep linking, nested navigators, modal flows).
• State management at scale (Redux Toolkit, Zustand, Recoil, or equivalent) + predictable data flow.
• API integration: REST/GraphQL consumption, request caching, pagination, retries, error handling.
• Handling auth flows (JWT/OAuth), token refresh, secure storage patterns (Keychain/Keystore concepts).
• Strong UI implementation skills: responsive layouts, different screen sizes, accessibility basics.
• Proven experience in Python and backend development using FastAPI / Django / Flask.
• Understand principles of cloud native development.
• Usage of docker for development environment.
• Familiar with Kubernetes (application lifecycle and environment).
• Familiar with Helm charts (their maintenance and usage).
• Familiar with ArgoCD, Grafana, Github.
• Nice to have — familiarity with helmfile.

Required Skills

• React Native Expo, Styled Components, Mobx/Redux, WebSockets.
• Experience with Firebase.
• Expo SDK, Expo Modules.
• Python: Advanced
• FastAPI / Django / Flask

Language skills

English: Upper intermediate (B2)

Employee Perks & Benefits

• Challenging and rewarding tasks with autonomy in a distributed international team
• Motivated colleagues who foster a collaborative environment
• Competitive salary based on your experience and expertise
• 20 vacation days + state holidays + your birthday off (for full-time employees)
• Sick leave coverage (5 days for full-time employees)
• Opportunities for regular business trips abroad