backend engineer nodejs

RubyPlay Limited in Warsaw offers a remote-first role within the Engineering Team. As a Backend Java engineer, you will design scalable, low-latency game services and APIs while collaborating with game designers, product teams, and client developers.The team focuses on high-throughput systems, distributed simulations, and performance tuning, with...

StorkJet in Katowice is looking for a senior/backend engineer to work with aviation data. You will design and modernize backend services while optimizing data pipelines used by airlines. The role calls for strong expertise in Python or Java and significant experience with production databases.As part of a friendly and dynamic team, you'll help improve...

N-iX in Kraków is seeking a Senior Kotlin Engineer to design, build and operate scalable Kotlin microservices on AWS for a leading European fintech client. You will work as a hands-on IC embedded in client squads.The role emphasizes AI-native delivery, distributed systems, PostgreSQL, Grafana observability, and agile methodologies. It offers flexible...

Wrike’s Backend Reliability (BRE) team builds core reliability solutions for scalable, high‑availability backends. You’ll design, implement, and improve systems like rate limiters, migration tools, and distributed caching to sustain 99.99% uptime.You’ll lead incident investigations, mentor engineers, and promote best practices, while leveraging AI...

Sigli is seeking an experienced backend engineer to join our international team on a 9-month remote project. You will design, develop, and maintain scalable Java microservices and REST APIs powering dashboards, reporting, and data integration for enterprise customers.The role emphasizes PostgreSQL data handling, AI-assisted development, and collaboration...

Star is seeking a hands-on QA contractor to test a backend, multi-service application focused on asynchronous communication patterns. You will spin up services with Docker Compose, write automated tests in Python using pytest, and validate MQTT or other broker-based flows integrated into CI/CD pipelines.The role emphasizes end-to-end and integration testing...

Auctane is hiring an Associate Software Engineer in Poland to contribute to backend development using Java and Spring Boot, and to design and consume RESTful APIs. You will gain hands-on experience with BPM workflows, AWS services, and test automation in a hybrid working model.Join a global engineering team and grow technical skills while collaborating...

dyvenia is seeking a Senior Python Engineer with React experience to build scalable enterprise systems for governing AI agents. You will focus on Python backend development while contributing to platform governance, Python SDKs, and selected frontend work.The role centers on 60–70% Python backend work and 10–20% React frontend, with the rest spent on...

HeadHR poszukuje doświadczonego PHP developera do pracy nad sklepami online opartymi na Magento 2, PrestaShop i WooCommerce. Do obowiązków należy tworzenie i modyfikacja modułów oraz prac nad motywami, a także techniczna analiza wymagań biznesowych i optymalizacja backendu.Wymagane min. 3 lata doświadczenia, dobra znajomość PHP 7/8+, GraphQL, REST...

Kingfisher plc is seeking a Lead Software Engineer to join their Kraków team. This hybrid role involves leading the development of scalable software solutions and providing technical leadership while working closely with cross-functional teams.Ideal candidates will have extensive experience in backend applications, particularly with Java and Kotlin, along...

Persistent Systems seeks a Python Developer to design and build scalable backend systems using cloud-native microservices. You will create robust RESTful APIs, containerized services, and deploy on Kubernetes/OpenShift platforms.The role requires 5+ years of Python experience, strong knowledge of distributed systems, and hands-on DevOps with Docker and...

Akvelon is seeking Middle and Senior .NET Software Engineers to join a long-term enterprise cloud project. You will design, develop, and operate cloud-native services on Microsoft Azure, combining backend development with production support and continuous improvement.The role involves investigating production issues, ensuring security, and collaborating with...

Apollogic is seeking a Senior Backend Developer to build backend technology supporting medical innovation with the HoloMedicine® platform. This role involves developing reliable services in a regulated MedTech environment utilizing C# and Python.As a Senior Backend Developer, you will design backend services, develop APIs, and ensure efficient communication...

ALTEN Polska poszukuje specjalisty Java/Backend z 6–8 lat doświadczenia do pracy w Krakowie. Do obowiązków należy projektowanie i wdrażanie wysokowydajnych rozwiązań, integracja z systemami wewnętrznymi oraz tworzenie REST API i potoków danych.Pracujemy w modelu hybrydowym z możliwością relokacji i rozwoju zawodowego w europejskim liderze...

Qlub is seeking a Senior Backend Engineer – Payments to design, build, and operate secure, scalable payment services across gateways, transactions, and integrations with POS systems and providers. You’ll deliver backend features in Golang for customer-facing and internal platforms, ensuring reliability and security.You will collaborate with product,...

Aurora Solar, Warsaw-based hybrid role, builds backend systems powering automated solar installations. You’ll craft robust, scalable software across languages like Java, Python, and JavaScript, contributing to a platform that designs and deploys solar projects with precision and compliance.Join a collaborative, evolving tech stack and take operational...

LeoVegas Group is building a world-class Sportsbook platform and operates in a high-volume, real-time environment where speed, correctness, scalability and reliability are critical. We are seeking a highly experienced Staff Backend Engineer to lead design, development and evolution of distributed systems while staying hands-on and mentoring teams.This role...

Batgroup in Warsaw or Lisbon (hybrid) is seeking a skilled PHP Developer to join our engineering team and help build the platforms behind Batmaid and PFA. You will design, develop, test, and maintain web applications and backend services used daily by customers and cleaners, collaborating with product, data and operations to ship scalable, reliable...

Firma technologiczna w Łodzi poszukuje programisty PHP z co najmniej 3-letnim doświadczeniem w Symfony. Obowiązki obejmują tworzenie kodu backendowego dla systemu bazodanowego Muza oraz weryfikację jakości kodu. Oferujemy konkurencyjne wynagrodzenie, elastyczne godziny pracy i możliwość całkowitej pracy zdalnej. Jeśli masz doświadczenie w REST...

An international advisory firm seeks a Senior Backend Developer in Warsaw, Poland. This fixed-term role involves developing a DataHub and creating efficient ETL processes using Spark and Scala. Candidates should have a minimum of 7 years of programming experience and proficiency in BigData technologies. The position offers a permanent contract, training, and...