CrawlJobs Logo

Middle React Engineer

Poland · Job Posted February 13, 2026
Apply Position
Job Link Share

Job Description

N-iX is seeking a talented and experienced Middle React Engineer to join our dynamic development team. As a React Engineer, you will be responsible for developing high-quality web applications using React, TypeScript, Redux, GraphQL, and styled-components. You will have the opportunity to work on exciting projects and collaborate with a team of passionate developers. The client is defining the future of cybersecurity through our XDR platform that automatically prevents, detects, and responds to threats in real-time. Singularity XDR ingests data and leverages our patented AI models to deliver autonomous protection. With a client, organizations gain full transparency into everything happening across the network at machine speed – to defeat every attack, at every stage of the threat lifecycle. We are a values-driven team where names are known, results are rewarded, and friendships are formed. Trust, accountability, relentlessness, ingenuity, and a customer defines the pillars of our collaborative and unified global culture. We're looking for people that will drive team success and collaboration across the project. If you’re enthusiastic about innovative approaches to problem-solving, we would love to speak with you about joining our team!

Job Responsibility

  • Develop robust and scalable web applications using React, TypeScript, Redux, GraphQL, and styled-components
  • Collaborate with the design and product teams to translate wireframes and mockups into functional components
  • Implement responsive designs and ensure cross-browser compatibility
  • Write clean, maintainable, and efficient code using best practices and coding standards
  • Conduct code reviews and provide constructive feedback to improve code quality and maintain consistency
  • Optimize application performance and identify areas for improvement
  • Work closely with backend developers to integrate frontend components with the server-side infrastructure
  • Troubleshoot and debug issues, addressing bugs and performance bottlenecks
  • Stay updated with the latest frontend development trends and technologies, sharing knowledge and insights with the team

Requirements

  • Solid experience (4-5+ years) in developing web applications using React
  • Proficiency in TypeScript for building scalable and type-safe applications
  • Familiarity with GraphQL and its implementation in frontend applications
  • Excellent understanding of web technologies such as HTML5, CSS3, and JavaScript
  • Strong problem-solving and analytical skills, with the ability to quickly identify and resolve issues
  • Good communication skills and the ability to work collaboratively in a team environment
  • Ability to adapt and learn new technologies and frameworks as required
  • Accessibility tools

Nice to have

Experience with Rest API

What we offer

  • Flexible working format - remote, office-based or flexible
  • A competitive salary and good compensation package
  • Personalized career growth
  • Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
  • Active tech communities with regular knowledge sharing
  • Education reimbursement
  • Memorable anniversary presents
  • Corporate events and team buildings
  • Other location-specific benefits

Looking for more opportunities?

Search for other job offers that match your skills and interests.

Similar Jobs for

Middle React Engineer

8 matching positions

Middle Software Engineer (React)

Our Client is the leading energy SaaS company delivering highly-technical insigh...
Location
Location
Poland , Rzeszów
Salary
Salary:
Not provided
edvantis.com Logo
Edvantis
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • EU residence
  • 3+ years of software development experience in building web applications using React
  • Extensive experience with modern web application development tools and libraries
  • Multiple-years experience writing modern JavaScript (ES2015 and later) code
  • Knowledge and experience with one JavaScript-based bundler (we use webpack)
  • Experience with Node.js
  • Experience with Docker/Kubernetes
  • Understanding of CI/CD
  • Familiarity with OOP and Agile methodologies
  • Being comfortable managing source code using Git (we use GitHub)
Job Responsibility
Job Responsibility
  • Rapidly prototype new features in a React-based web application
  • Influence design and user experience of single-page applications
  • Interact with and develop new microservices backed by document-based databases and GPU-accelerated databases
  • Write unit, integration, and end-to-end tests
  • Stay up to date on the industry trends through self-study, research, and online courses
  • Mentor junior team members
What we offer
What we offer
  • Remote-first work model with flexible working hours (we provide all equipment)
  • Comfortable and fully equipped offices in Lviv and Rzeszów
  • Competitive compensation with regular performance reviews
  • 18 paid vacation days per year + all state holidays
  • 12 days of paid sick leave per year without a medical certificate + extra paid leave for blood donation
  • Medical insurance with an affordable family coverage option
  • Mental health program which includes free and confidential consultations with a psychologist
  • English, German, and Polish language courses
  • Corporate subscription to learning platforms, regular meetups and webinars
  • Friendly team that values accountability, innovation, teamwork, and customer satisfaction
  • Fulltime
Read More
Arrow Right

Middle Software Engineer (Java / React)

We are looking for a skilled Middle Java Developer to join the team developing a...
Location
Location
Poland , Rzeszów
Salary
Salary:
Not provided
edvantis.com Logo
Edvantis
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Location within the EU
  • 3+ years of professional experience in Java development
  • 1+ years of commercial experience with TypeScript and React
  • Strong knowledge of Java (Java 17+)
  • Hands-on experience with Java Concurrency
  • Good understanding of design patterns and clean architecture principles
  • Experience with Spring, Servlet API
  • Good understanding of HTTP, REST
  • Good understanding of monolith and microservices architectures
  • Experience with relational databases (PostgreSQL, MySQL)
Job Responsibility
Job Responsibility
  • Implement new product features, improvements, and extensions for existing functionality
  • Contribute to product modernization efforts
  • Develop and maintain backend services using Java, Spring, and related technologies
  • Write clean, maintainable, and well-tested code
  • Participate in production support activities
  • Troubleshoot and resolve complex technical issues in production environments
  • Collaborate with cross-functional teams (QA, DevOps, Product) throughout the development lifecycle
What we offer
What we offer
  • Remote-first work model with flexible working hours (we provide all equipment)
  • Comfortable and fully equipped office in Rzeszów
  • Competitive compensation with regular performance reviews
  • 18 paid vacation days per year + all state holidays
  • 12 days of paid sick leave per year + extra paid leave for blood donation
  • Fixed monthly health & wellness compensation, applicable to: medical insurance
  • fitness and sports activities
  • Mental health program which includes free and confidential consultations with a psychologist
  • English, German, and Polish language courses
  • Corporate subscription to learning platforms, regular meetups and webinars
  • Fulltime
Read More
Arrow Right

Middle React Native Developer

We are looking for an experienced Middle React Native Developer to join our team...
Location
Location
Salary
Salary:
Not provided
maddevs.io Logo
Mad Devs
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 3+ years of experience with React Native
  • Strong knowledge of JavaScript and TypeScript
  • Solid understanding of mobile application architectures
  • Experience working with production environments and real users
  • Ability to work with legacy or imperfect code and improve it step by step
  • Strong analytical and problem-solving skills
  • English and Russian at B2 level, for communication with stakeholders and team
Job Responsibility
Job Responsibility
  • Develop and maintain a mobile application using React Native (TypeScript)
  • Work with the existing production codebase and improve its structure and quality
  • Implement new features and contribute to UX improvements
  • Diagnose and fix production issues, monitor app stability
  • Collaborate with the frontend, backend, QA, and DevOps teams
  • Integrate with third-party APIs and services
  • Maintain basic technical documentation
  • Participate in code reviews and contribute to engineering best practices
What we offer
What we offer
  • Flexible working hours
  • Remote-first culture
  • Long-term projects
  • Salary in dollars
  • Professional communities
  • Onsite business trips
  • Training budget
  • Paid conferences
Read More
Arrow Right

Middle AI Engineer

Vention is a global engineering partner to tech leaders and fast-growing startup...
Location
Location
Uzbekistan , Tashkent
Salary
Salary:
Not provided
ventionteams.com Logo
Vention
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 3+ years in software development (backend or full-stack)
  • Strong proficiency in Node.js or Python for building APIs and integrating with React frontends
  • Experience architecting data preprocessing, embedding, and retrieval pipelines (RAG systems with LLMs like OpenAI, Anthropic, Gemini)
  • Hands-on work with multi-agent orchestration (LangChain, CrewAI, AutoGen) and AI tools (Cursor, GitHub Copilot, OpenAI Codex)
  • Skills in automated evaluation frameworks (model benchmarking, regression testing, continuous improvement pipelines)
  • Deployment experience in cloud-native environments (Fly.io, Supabase, Kafka, ClickHouse) and collaboration with DevOps/data teams
  • B2+ English for communicating with English-speaking clients
Job Responsibility
Job Responsibility
  • Architect and implement data preprocessing, embedding, and retrieval pipelines for dynamic, context-aware insights in user sessions and product workflows
  • Build, refine, and optimize retrieval-augmented generation (RAG) systems using top LLMs and retrieval frameworks to deliver relevant, actionable information
  • Develop and maintain Node.js and Python APIs to efficiently serve AI-driven insights to React-based frontend applications
  • Collaborate with product managers, designers, and data engineers to conceptualize and iterate on intelligent features boosting user experience and engagement
  • Prototype, validate, and deploy high-impact features rapidly with tools like OpenAI, Anthropic, and Gemini for fast learning and value delivery
  • Design automated evaluation frameworks, including model benchmarking, regression testing, and continuous improvement pipelines
  • Work with DevOps and data teams to deploy and scale AI services in cloud-native environments (e.g., Fly.io, Supabase, Kafka, ClickHouse)
What we offer
What we offer
  • EDU corporate community (300+ members): tech communities, interest clubs, events, a small R&D lab, a knowledge base, and a dedicated AI track
  • Licenses for AI tools: GitHub Copilot, Cursor, and others
  • Expanded medical support for employees in Tashkent
  • 19 working days of vacation per year, 21 after two years in the company
  • Corporate getaway & teambuilding activities
  • Support for the significant events in your life
  • Referral bonuses for bringing in new talent
  • Fulltime
Read More
Arrow Right

Middle Full Stack Engineer (Frontend Focus)

We are developing a high-performance, scalable customer-related platform capable...
Location
Location
Salary
Salary:
Not provided
sigma.software Logo
Sigma Software Group
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Java / strong
  • Spring / good
  • AWS / good
  • React / good
  • Distributed Systems / good
What we offer
What we offer
  • Health & Legal support
  • Active professional community
  • Continuous education and growing
  • Flexible schedule
  • Remote work
  • Outstanding offices (if you choose it)
  • Sports and community activities
Read More
Arrow Right

Java React Full Stack Engineer

The Applications Development Senior Programmer Analyst is an intermediate level ...
Location
Location
India , Pune
Salary
Salary:
Not provided
https://www.citi.com/ Logo
Citi
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 8-10 years of relevant experience
  • Strong experience in Web technologies including HTML5, React, JavaScript
  • Strong experience in Core Java, J2EE and server side development using Spring
  • Strong experience with writing middle-ware for multiuser, multithreading application
  • Good experience developing REST services
  • Good experience with Unit testing and mocking frameworks and TDD
  • Demonstrated leadership and project managerial skills using Agile methodologies
  • Good database design and SQL Writing, performance tuning skills
  • Bachelor’s degree/University degree or equivalent experience
Job Responsibility
Job Responsibility
  • Conduct tasks related to feasibility studies, time and cost estimates, IT planning, risk technology, applications development, model development, and establish and implement new or revised applications systems and programs to meet specific business needs or user areas
  • Monitor and control all phases of development process and analysis, design, construction, testing, and implementation as well as provide user and operational support on applications to business users
  • Utilize in-depth specialty knowledge of applications development to analyze complex problems/issues, provide evaluation of business process, system process, and industry standards, and make evaluative judgement
  • Recommend and develop security measures in post implementation analysis of business usage to ensure successful system design and functionality
  • Consult with users/clients and other technology groups on issues, recommend advanced programming solutions, and install and assist customer exposure systems
  • Ensure essential procedures are followed and help define operating standards and processes
  • Serve as advisor or coach to new or lower level analysts
  • Has the ability to operate with a limited level of direct supervision
  • Can exercise independence of judgement and autonomy
  • Acts as SME to senior stakeholders and /or other team members
  • Fulltime
Read More
Arrow Right

Strong Middle / Senior Full Stack Engineer

We at Sigma Software partner with industry leaders to deliver advanced protectio...
Location
Location
Multiple
Salary
Salary:
Not provided
sigma.software Logo
Sigma Software Group
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • JavaScript / expert
  • TypeScript / strong
  • React / strong
  • Node.js / expert
  • Go / expert
What we offer
What we offer
  • Competitive compensation
  • flexible work arrangements
  • Health & Legal support
  • Active professional community
  • Continuous education and growing
  • Flexible schedule
  • Remote work
  • Outstanding offices (if you choose it)
  • Sports and community activities
Read More
Arrow Right

Middle Full-Stack Engineer

Are you passionate about building secure, high-performance applications and work...
Location
Location
Salary
Salary:
Not provided
sigma.software Logo
Sigma Software Group
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • JavaScript / strong
  • Golang / strong
  • React / strong
  • Node.js / strong
  • English / strong
What we offer
What we offer
  • Diversity of Domains & Businesses
  • Variety of technology
  • Health & Legal support
  • Active professional community
  • Continuous education and growing
  • Flexible schedule
  • Remote work
  • Outstanding offices (if you choose it)
  • Sports and community activities
  • Fulltime
Read More
Arrow Right