April 24, 2026
Senior Full-Stack Developer – React & Python Expertise
Senior • Remote
6,300 - 9,450 USD
Warsaw, Poland
Ignite healthcare analytics with cutting-edge full-stack solutions — revolutionize data visualization and AI-powered workflows!
Portugal-based opportunity with remote work model (up to 5 days/week).
As a Senior Full-Stack Developer – React & Python Expertise, you will be working for our client, a leading innovator in healthcare analytics and AI-powered dashboards. You will help shape the future of healthcare data exploration by building interactive dashboards, visualization tools, and AI integrations that improve patient outcomes and operational efficiency. Join a team committed to transforming healthcare through advanced technology and innovative data solutions.
Your main responsibilities:
- Develop and enhance front-end applications using TypeScript and React (Vite, React Router), creating intuitive healthcare analytics dashboards and visualizations.
- Design and implement responsive UI components with modern libraries such as shadcn-ui, Radix UI, and Tailwind CSS.
- Build interactive data visualizations with Recharts, Visx, and custom D3.js visualizations to enable deep insights into healthcare data.
- Integrate real-time data capabilities with Supabase for seamless serverless backend interactions.
- Design and develop Python backends and CLI tools with FastAPI, Click, and Typer to manage data pipelines and AI workflows.
- Build CLI utilities for orchestrating workflows, executing queries, and managing data with user-centric UX and structured logging.
- Integrate with LLM/agent backends like OpenAI GPT-4, Claude, and Azure OpenAI to enable AI-driven data analysis, entity extraction, and content generation.
- Develop REST APIs and optimize data queries from PostgreSQL/Supabase to support analytics and operational metrics.
- Create data transformation layers to convert raw data into comprehensive UI-ready formats.
- Collaborate on external API integrations, including web scraping and cloud AI platforms, supporting features like brand visibility tracking and competitive intelligence in AI search platforms.
- Write comprehensive tests (unit, integration) with pytest, participate in code reviews, and maintain clear documentation for codebases and APIs.
You're ideal for this role if you have:
- 5+ years of experience as a Full-Stack Developer with a focus on data visualization and healthcare analytics.
- Strong expertise in front-end development with TypeScript and React, including hooks, context, and modern React patterns.
- Proficiency in data visualization libraries: Recharts, Visx, with D3.js experience as a plus.
- Solid Python backend experience, including CLI development, API creation, async programming, and structured logging.
- Hands-on experience integrating with LLMs such as OpenAI GPT-4, Claude, or Azure OpenAI, especially for data analysis and content generation.
- Skilled in REST API development, database querying (PostgreSQL/Supabase), and data transformation for UI consumption.
- Familiarity with Git workflows, code review practices, and documentation standards.
- Good command of English, able to communicate complex technical concepts effectively.
It is a strong plus if you have:
- Azure cloud deployment experience (App Service, Functions, Container Apps).
- Knowledge of cloud CI/CD pipelines (Azure DevOps, GitHub Actions).
- Experience with FastAPI or Flask, OAuth/JWT authentication, and API documentation with OpenAPI/Swagger.
- Knowledge of real-time features like WebSockets or SSE for live data updates.
- Healthcare domain knowledge, including HIPAA compliance considerations, patient journey visualization, and cohort analysis.
- Familiarity with multi-cloud architectures, specifically AWS and Azure, and cloud-agnostic design principles.
Language Required for the role:
- Fluent English
Eligibility to work in:
- Only candidates with an existing legal right to work in the European Union will be considered for this role.
#MAKEYourCareerBETTER
Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.
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We are hiring a Full Stack Developer to lead the technical implementation of this dashboard platform. You will work to architect, build, and deploy the application, making key technical decisions and establishing patterns that the broader team will follow. Role Overview This role requires someone who can work independently with minimal oversight, has deep expertise in React, Python/FastAPI, and .NET and has hands-on production experience with Auth0, Kubernetes, Azure Key Vault, and Azure DevOps. You should be comfortable owning the full stack from database queries to UI polish. You are obsessed with building dashboards that help users quickly reach the "aha" moment, the insight that changes their business. You understand that great analytics tools require both powerful backends and intuitive, fast front-ends. Key Responsibilities Architecture & Technical Leadership • Architect the end-to-end solution, including frontend component structure, API design, data access patterns, and deployment topology. • Make technical decisions on frameworks, libraries, and patterns; document architectural decisions for the team. • Design a multi-tenant architecture supporting customer-specific configurations, including product line and country segments. • Establish coding standards, review processes, and best practices for the project. Backend Development - Python/API (Primary), .NET (Secondary) • Build high-performance RESTful APIs using Python and FastAPI as the primary backend framework to serve analytics data to the React frontend. • Support and maintain secondary backend services using .NET / ASP . net Core where appropriate. - Implement efficient data access layers connecting to Databricks (via API's), SQL Server, and PostgreSQL. • Design and implement caching strategies using Redis and in-memory caching to optimize response times for data-heavy queries. • Build background services for report generation, data refresh, and scheduled tasks using Python workers, task queues, scheduled jobs, or .NET hosted services where applicable. • Implement comprehensive logging, health checks, and observability using Azure Monitor and Application Insights. Frontend Development - React • Build a modern, responsive React application with TypeScript, implementing interactive dashboards and data visualizations. • Develop reusable component library with consistent styling using TailwindCSS or styled-components. • Implement complex data visualizations using Superset or other charting libraries such as Recharts, Chart.js, D3.js, or Apache ECharts. • Optimize frontend performance for large datasets including virtualization, lazy loading, and efficient state management. • Integrate Auth0 SDK for frontend authentication flows, token management, and protected routes. Authentication, Authorization & Security • Utilize end-to-end authentication using Auth0, including SSO, MFA, and social login configurations. • Design and implement role-based access control using Auth0 roles and permissions mapped to application features. • Integrate Azure Key Vault for secure storage and retrieval of secrets, API keys, connection strings, and certificates. • Implement secure API authentication using JWT tokens with proper validation and refresh mechanisms. • Ensure compliance with security best practices, including OWASP guidelines, data encryption, and audit logging. DevOps, Infrastructure & Deployment • Work with DevOps to design and implement Kubernetes deployments on Azure Kubernetes Service, including pod configurations, services, ingress, and horizontal pod autoscaling. • Work with DevOps to build comprehensive CI/CD pipelines for automated build, test, and deployment across dev, staging, and production environments. • Create and maintain Docker containers for both frontend and backend applications with optimized, multi-stage builds. • Work with DevOps to implement infrastructure as code using Terraform or ARM templates for reproducible deployments. • Configure environment-specific settings, feature flags, and deployment slots for zero-downtime releases. • Set up monitoring, alerting, and dashboards using Azure Monitor, Application Insights, and Log Analytics. Required Qualifications - 7-10+ years in full stack development - Python/FastAPI : 5+ years of backend development with Python, including production experience building APIs with FastAPI - .NET / C# : Experience with ASP .net Core, Entity Framework, and Web APIs. Secondary backend experience preferred. - React / TypeScript : 4+ years building production React applications - Auth0 : 2+ years implementing Auth0 in production, including SSO, RBAC, and MFA - Kubernetes : 2+ years deploying and managing apps on Kubernetes/AKS - Azure Key Vault : Production experience integrating Key Vault for secrets management - Azure DevOps : 2+ years building CI/CD pipelines in Azure DevOps - Databases : Strong SQL skills with SQL Server and/or PostgreSQL - Docker : Proficient in containerizing Python/FastAPI, .NET, and React applications Technical Skills Backend - Python / FastAPI • Python backend development with FastAPI • RESTful API design and implementation • Pydantic models and validation • Dependency injection and middleware patterns in FastAPI • Async programming and performance optimization • SQLAlchemy, SQLModel, or equivalent ORM/data access libraries • Integration with SQL Server, PostgreSQL, and Databricks APIs • Background jobs using Celery, Redis Queue, APScheduler, Azure Functions, or similar tools • API documentation using OpenAPI/Swagger • Unit and integration testing with pytest or similar frameworks Secondary Backend - .NET Core • ASP.NET Core Web APIs with dependency injection, middleware, and filters • Entity Framework Core and/or Dapper for data access • Background services using IHostedService or Hangfire • API documentation with OpenAPI/Swagger • Unit testing with xUnit, Moq, and integration testing patterns Frontend (React) • React 18+ with hooks, context, and functional components • TypeScript for type-safe development • State management with Redux Toolkit, Zustand, or React Query • Data visualization libraries, including Superset or other options such as Recharts, Chart.js, D3.js, or ECharts • CSS frameworks, preferably TailwindCSS, or CSS-in-JS solutions • Testing with Jest, React Testing Library, and Cypress Auth0 Expertise • Auth0 tenant configuration and application setup • Universal Login customization and branding • Auth0 Rules, Actions, and Hooks for custom logic • Role-Based Access Control implementation • Machine-to-machine authentication for backend services • Auth0 SDK integration with Python/FastAPI, .NET, and React Kubernetes & Azure • Kubernetes concepts: Deployments, Services, ConfigMaps, Secrets, Ingress • Azure Kubernetes Service provisioning and management • Helm charts for application packaging • Azure Key Vault integration with AKS using CSI driver or pod identity • Azure DevOps YAML pipelines for build and release • Infrastructure as Code using Terraform or ARM templates) Preferred Qualifications • Experience with Databricks or Spark for big data integration • Experience integrating LLM/GenAI services, including OpenAI or Azure OpenAI, into applications • Power BI embedded analytics or Apache Superset experience • GraphQL experience, both server and client • Background in consumer insights, CPG, or market research data domains • Experience building multi-tenant SaaS applications • Azure certifications such as AZ-204, AZ-400, or AKS specialty
Technology
DataArt
Full Stack Developer with React and C#, Web Platform
Mid
Remote
Wroclaw, Poland
15,000 - 19,500 PLN
🏢 Summary: Full Stack Developer role focused on building and evolving a modern web application platform with complex workflows and data-driven features. The position involves developing and maintaining both frontend and backend components, ensuring scalability, performance, and reliability. You will collaborate within a cross-functional team to deliver iterative improvements using modern development practices and AI-assisted tools. 🗂️ Requirements: Experience in full stack web application development, Hands-on experience with React, Experience with C# and .NET or comparable backend technologies, Practical experience with SQL-based databases and writing queries, Experience using AI-assisted development tools (e.g., Claude, Cursor), Solid understanding of Git and version control workflows, Ability to work with and extend existing codebases 📃 Skills: React, TypeScript, C#, .NET, SQL, Git, REST, Claude, Cursor 🏢 Description: Project overview The project is a web based application platform designed to support complex user workflows and data driven features. It focuses on performance, maintainability, and iterative delivery of new capabilities. Team You will be part of a cross functional development team consisting of full stack developers, frontend specialists, backend engineers, and QA engineers. The team works collaboratively, reviews code regularly, and follows shared development standards and branching practices. Position overview We are looking for a Full Stack Developer to contribute to the development and evolution of a modern web application platform. You will work on both frontend and backend components, focusing on building reliable, scalable features and improving existing functionality. The role combines hands on development with close collaboration across engineering and product roles. Technology stack React, TypeScript, C#, .NET, SQL based databases, Git, REST APIs, AI assisted development tools such as Claude and Cursor Responsibilities Develop and maintain frontend features using React and related technologies Build and support backend services using C# and .NET Collaborate with team members on feature design, implementation, and code reviews Work with SQL based databases to design, query, and optimize data storage Use AI assisted development tools to improve development efficiency and code quality Follow established Git workflows and branching strategies Participate in troubleshooting, debugging, and performance improvements Requirements Experience building web application platforms in a full stack role Hands on experience with React for frontend development Experience with C# and .NET or comparable backend technologies Understanding of SQL based databases and practical experience writing queries Experience using AI tools to support software development, including Claude or Cursor Solid understanding of Git, version control, and common branching flows Ability to work with existing codebases and contribute to ongoing development Nice to have Experience with cloud based environments Familiarity with CI CD pipelines Experience working on large scale or long term web platforms Exposure to performance optimization and application monitoring What We Offer: Vacation days : Up to 26 business days per year. 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types Health and life insurance (Luxmed) MyBenefit platform with Multisport option Internal psychological support service English language classes from the first working day Access to external learning platforms : O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training Flexible workplace : work from the office, from home, or choose a hybrid option Tech Skills Mentoring Program Opportunities to develop as a public speaker, mentor, or technical interviewer Fully paid idle (bench) when not involved in a project Certification reimbursement (AWS, GCP, Microsoft, etc.)