Senior Full-stack Developer (React/Java)

iTeamly • JavaScript • Java • TypeScript • SQL • 5 days ago
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Salary
$40k – $71k per year
Location
Remote (likely Poland)
Seniority
Senior · 4+ years exp
Employment
Contractor

First seen by Alion on Oct 6, 2026.

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iTeamly

About us iTeamly is an IT partner supporting companies in building, scaling, and improving digital products. We combine technology expertise with strong delivery and recruitment capabilities, helping clients access the right people and skills faster.
iteamly.com • HQ: Warsaw, Poland • IT Outsourcing & Dedicated Teams • Est. 2021
Tech stack of iTeamly

✅ Your responsibilities:

  • Design, develop, and maintain scalable full stack applications using Java and React.

  • Build and maintain backend services with Java, Spring Framework, Spring Boot, SQL, and AWS.

  • Develop modern, reusable, and responsive user interfaces using React, TypeScript, and JavaScript.

  • Design and implement scalable frontend architecture and reusable UI components.

  • Collaborate closely with Product Owners, QA Engineers, and other development teams.

  • Integrate frontend applications with REST APIs and backend microservices.

  • Contribute to architectural decisions and technical discussions.

  • Ensure application performance, scalability, security, and maintainability.

  • Participate in code reviews, sprint planning, and Agile ceremonies.

  • Support deployment automation, production operations, and troubleshooting.

  • Mentor less experienced developers and promote engineering best practices.

🧠 Our requirements:

  • Minimum 4–5 years of professional software development experience.

  • Commercial experience with Java, Spring Framework, and Spring Boot.

  • Commercial experience with React.js and TypeScript.

  • Solid understanding of JavaScript (ES6+).

  • Experience working with AWS in production environments.

  • Understanding of microservices architecture.

  • Hands-on experience with SQL and relational databases.

  • Experience integrating and consuming REST APIs.

  • Very good knowledge of HTML5, CSS3 / SCSS, responsive design, and cross-browser compatibility.

  • Experience with frontend testing using Jest and React Testing Library.

  • Familiarity with modern frontend tooling and build processes.

  • Ability to work independently, take ownership of delivered solutions, and contribute to system design.

  • Excellent communication skills and experience working in Agile environments

⭐ Nice to have:

  • Experience with Kafka or other event-driven architectures.

  • Knowledge of Hadoop or Apache Spark.

  • Experience with Next.js.

  • Experience with Redux, Zustand, or similar state management solutions.

  • Previous experience in Healthcare or Life Sciences projects.

🌟 What we offer:

  • Long-term cooperation on an international project.

  • Flexible working hours.

  • Opportunity to influence architecture and technical decisions.

  • Modern technology stack.

  • Supportive, collaborative engineering culture.

  • Learning and development opportunities.

  • Modern equipment and comfortable working environment.

Tech stack

  • Java
  • React
  • AWS
  • Spring
  • JavaScript
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