Senior Full Stack Developer (React+Java)

Senior Full Stack Developer (React+Java)

Java

Chmielna 73, Warszawa +4 Locations

Sigma Software

Full-time
B2B
Senior
Remote

Tech stack

    English

    B2

    Java

    advanced

    REST API

    advanced

    React

    advanced

    C++

    regular

Job description

Join a globally recognized company where innovation meets impact. Our team of seasoned professionals and a culture built on excellence, we deliver top-tier solutions that shape industries and drive meaningful results. Be part of a Сompetence Сenter where your expertise will be valued, your voice will be heard, and your career will be empowered.


Customer

It is an international technology company that specializes in developing high-load platforms for data processing and analytics. Its core product helps businesses manage large volumes of data, build models, and gain actionable insights. The company operates globally and serves clients primarily in the marketing and advertising sectors, and focuses on modern technologies, microservices architecture, and cloud-based solutions.


Requirements

  • 5+  years of experience in software development with object-oriented programming languages (Java, Kotlin, C++)

  • Experience in building multitier web applications and creating REST APIs

  • Strong understanding of OOP principles, design patterns, algorithms, and data structures

  • Experience with Front-end frameworks such as React or Angular

  • Hands on experience with Linux/Unix environments

  • Practical knowledge of cloud platforms (AWS, Google Cloud, or Azure)

  • Familiarity with both relational and NoSQL databases (HBase, Cassandra, MongoDB, Redshift)

  • Bachelor’s or Master’s degree in computer science, engineering, or a related field

  • At least Upper-Intermediate level of English


Responsibilities

  • Develop and maintain high-load web applications using a microservices architecture

  • Work with large datasets: design and implement ingestion, processing, and analytics workflows

  • Design and build REST APIs

  • Utilize Front-end frameworks (React, Angular, etc.) for web development

  • Optimize solutions for scalability, reliability, and high performance

  • Collaborate with Data Analysts and Data Scientists to integrate algorithms and models into the product

  • Ensure data security and compliance standards are met across solutions

Published: 18.08.2025

Meet the company

Sigma Software

Sigma Software is a global software development company that enables enterprises, startups, and product houses to meet their technology needs through end-to-end delivery. We have been working since 2002, from all over the world.

Company profile
Office location