CrawlJobs Logo
Briefcase Icon
Category Icon

Senior Software Engineer - Systems Poland Jobs

54 Job Offers

Filters
New
Senior Software Engineer (PHP)
Save Icon
Join our Data Management team as a Senior Software Engineer (PHP). You will architect and build complex data solutions like Data Blending and Data Explorer from scratch. We seek an expert with 7+ years of backend experience, strong architectural skills, and fluency in English. Enjoy an attractive...
Location Icon
Location
Poland
Salary Icon
Salary
Not provided
supermetrics.com Logo
Supermetrics
Expiration Date
Until further notice
New
Senior Software Engineer - C# OR Java
Save Icon
Join our Connectivity division in Gdansk as a Senior Software Engineer. You'll design and maintain APIs integrating our platform with thousands of European banks, tackling scalability and regulatory complexity. We seek strong backend experience in .NET/Java, API design, and PSD2 interfaces. Make ...
Location Icon
Location
Poland , Gdansk
Salary Icon
Salary
Not provided
mastercard.com Logo
Mastercard
Expiration Date
Until further notice
New
Senior Software Engineer - Backend
Save Icon
Join our Hub team in Łódź as a Senior Backend Engineer. You will design and build high-volume microservices in Java/Kotlin and Spring for critical third-party integrations. Leverage your AWS and distributed systems expertise to enhance our parking platform. We seek a proactive problem-solver dedi...
Location Icon
Location
Poland , Łódź
Salary Icon
Salary
Not provided
arrive.com Logo
Arrive
Expiration Date
Until further notice
New
Senior Software Engineer (Python)
Save Icon
Join Supermetrics as a Senior Python Engineer on the Data Storage team. Develop next-gen data transfer systems and storage solutions that power strategic AI/ML capabilities. We seek 6+ years of Python backend SaaS experience, expertise in data pipelines, and API integrations. Enjoy competitive co...
Location Icon
Location
Poland
Salary Icon
Salary
Not provided
supermetrics.com Logo
Supermetrics
Expiration Date
Until further notice
Senior Software Engineer
Save Icon
Join Paymentology as a Senior Software Engineer and build the future of global payments from Poland. Design and develop high-scale Java microservices and distributed systems in a 100% remote, globally distributed team. Leverage your expertise in cloud infrastructure, TDD, and event-driven archite...
Location Icon
Location
Poland
Salary Icon
Salary
Not provided
paymentology.com Logo
Paymentology
Expiration Date
Until further notice
Senior Backend Software Engineer
Save Icon
Join Atlassian in Gdańsk as a Senior Backend Engineer. Drive complex cloud-focused projects for products like Jira and Confluence using Java and microservices. Mentor junior engineers while enjoying health coverage and paid volunteer days in a collaborative R&D environment.
Location Icon
Location
Poland , Gdańsk
Salary Icon
Salary
Not provided
https://www.atlassian.com Logo
Atlassian
Expiration Date
Until further notice
Senior Software QA Engineer
Save Icon
Join Inetum Polska as a Senior Software QA Engineer in Warsaw. Design and implement automated test strategies for web apps, APIs, and microservices using Python, Java, or JavaScript. Enjoy a hybrid model, flexible hours, and a personalized benefits cafeteria system while driving quality in a glob...
Location Icon
Location
Poland , Warsaw
Salary Icon
Salary
Not provided
https://www.inetum.com Logo
Inetum
Expiration Date
Until further notice
Senior Python Software Engineer
Save Icon
Join our Warsaw team as a Senior Python Software Engineer & Consultant. This hybrid role requires 5+ years of Python expertise, Python Agent knowledge, and strong B2 communication skills in Polish and English. Enjoy flexible hours, a cafeteria system, mentoring, and a supportive culture while dri...
Location Icon
Location
Poland , Warsaw
Salary Icon
Salary
Not provided
https://www.inetum.com Logo
Inetum
Expiration Date
Until further notice
Senior Software QA Engineer
Save Icon
Join Inetum Polska in Warsaw as a Senior Software QA Engineer. Design and automate tests with Playwright/JavaScript for a key telecom e-commerce platform. Enjoy a hybrid model, flexible hours, and strong development support in an inclusive culture.
Location Icon
Location
Poland , Warsaw
Salary Icon
Salary
Not provided
https://www.inetum.com Logo
Inetum
Expiration Date
Until further notice
Senior .Net Software Engineer
Save Icon
Join our Warsaw team as a Senior .NET Software Engineer. Develop a custom CRM and back-end systems using C#, .NET, and SQL for a global telecom client. Enjoy a hybrid model, flexible hours, and strong mentorship in a supportive culture.
Location Icon
Location
Poland , Warsaw
Salary Icon
Salary
Not provided
https://www.inetum.com Logo
Inetum
Expiration Date
Until further notice
Senior JVM Software Engineer
Save Icon
Seeking a Senior JVM Software Engineer in Warsaw for a hybrid role. Drive feature development (70% BE/30% FE) using Java, Spring Boot, React, and PostgreSQL. Enjoy flexible hours, a cafeteria system, and a supportive culture with technical mentoring. Join a telecom project requiring 4+ years of f...
Location Icon
Location
Poland , Warsaw
Salary Icon
Salary
Not provided
https://www.inetum.com Logo
Inetum
Expiration Date
Until further notice
Senior iOS Software Engineer
Save Icon
Join our Warsaw team as a Senior iOS Software Engineer, also leveraging Android expertise. Develop innovative mobile solutions using Swift, Kotlin, and modern architectures like MVVM and SwiftUI. Enjoy a hybrid model, flexible hours, and a rich benefits package including mentoring and a cafeteria...
Location Icon
Location
Poland , Warsaw
Salary Icon
Salary
Not provided
https://www.inetum.com Logo
Inetum
Expiration Date
Until further notice
Senior Python Software Engineer
Save Icon
Join Inetum Polska as a Senior Python Software Engineer in Warsaw. Develop AI-driven microservices with Python, FastAPI, and PostgreSQL on Azure. Enjoy a hybrid model (3 days office/week), flexible hours, and strong mentorship in an innovative team.
Location Icon
Location
Poland , Warsaw
Salary Icon
Salary
Not provided
https://www.inetum.com Logo
Inetum
Expiration Date
Until further notice
Senior Java Software Engineer
Save Icon
Join our Warsaw team as a Senior Java Engineer. Lead the migration of JBoss systems to a modern Spring Boot cloud environment using Java 17+, Camunda, and Kubernetes. Enjoy a hybrid model, flexible hours, and a rich benefits package including mentoring and a team-building budget. Apply your exper...
Location Icon
Location
Poland , Warsaw
Salary Icon
Salary
Not provided
https://www.inetum.com Logo
Inetum
Expiration Date
Until further notice
Senior Full Stack Software Engineer
Save Icon
Join Atlassian in Gdańsk as a Senior Full Stack Engineer. You will enhance Jira Align, building scalable features for enterprise customers using .NET/C#, React, and cloud tech. Enjoy a global team, health coverage, and paid volunteer days in this impactful role.
Location Icon
Location
Poland , Gdańsk
Salary Icon
Salary
244800.00 - 326400.00 PLN / Year
https://www.atlassian.com Logo
Atlassian
Expiration Date
Until further notice
Senior JVM Software Engineer
Save Icon
Join a leading German telecom & IT innovator at their new European Tech Center in Warsaw. As a Senior JVM Software Engineer, you'll develop the Sales Cockpit backend using Java, Spring Boot, and REST APIs. Enjoy a hybrid model, flexible hours, and benefits like a cafeteria system and revenue shar...
Location Icon
Location
Poland , Warsaw
Salary Icon
Salary
Not provided
https://www.inetum.com Logo
Inetum
Expiration Date
Until further notice
Senior JVM Software Engineer
Save Icon
Join our Kraków team as a Senior JVM Software Engineer. Design robust, scalable backend solutions using Java 8, Spring Boot, and Microservices. Enjoy a hybrid model, flexible hours, and a supportive culture with technical mentoring. Leverage your 5+ years of experience to integrate platforms and ...
Location Icon
Location
Poland , Kraków
Salary Icon
Salary
Not provided
https://www.inetum.com Logo
Inetum
Expiration Date
Until further notice
Senior Software Engineer
Save Icon
Join our Kraków team as a Senior Software Engineer to modernize and stabilize core systems. You'll need strong C++ skills, experience with C#/Python wrappers, and hands-on knowledge of Docker, Kubernetes, and Linux. This role offers a direct impact on critical infrastructure, flexible hours, priv...
Location Icon
Location
Poland , Kraków
Salary Icon
Salary
Not provided
https://www.montrosesoftware.com/ Logo
Montrose Software
Expiration Date
Until further notice
Senior JVM Software Engineer
Save Icon
Join our Poznań team as a Senior JVM Software Engineer. You will lead the migration of legacy JBoss/WildFly and Java 6/8 systems to modern Spring Boot 3.x and Java 21. Utilize your expertise in JPA, Docker, and Kubernetes to rebuild critical order management interfaces. We offer a hybrid model, f...
Location Icon
Location
Poland , Poznań
Salary Icon
Salary
Not provided
https://www.inetum.com Logo
Inetum
Expiration Date
Until further notice
Senior JVM Software Engineer
Save Icon
Join our Warsaw team as a Senior JVM Software Engineer. Lead the upgrade to Spring Boot 3.x and build new payment data systems using Java 21, Spring, and Hibernate. Enjoy a hybrid model, flexible hours, and a supportive culture with tailored mentoring. Fluent English and Polish are required.
Location Icon
Location
Poland , Warsaw
Salary Icon
Salary
Not provided
https://www.inetum.com Logo
Inetum
Expiration Date
Until further notice
Previous 1 2 3 Next
Explore Senior Software Engineer - Systems jobs and discover a pivotal role at the intersection of software development and core infrastructure. Professionals in these positions are the architects and builders of the foundational platforms, services, and frameworks that power large-scale, reliable, and performant applications. Unlike roles focused solely on end-user features, Senior Software Engineers in Systems delve into the underlying engine, optimizing for scalability, resilience, and efficiency to support millions of users and complex data flows. Typically, individuals in this profession are responsible for designing, developing, and maintaining critical system-level software. This includes creating distributed systems, high-throughput data pipelines, low-latency services, and robust platform infrastructure. Common responsibilities involve architecting scalable solutions, conducting deep-dive performance analysis and debugging across the entire software stack, establishing engineering best practices and standards, and providing technical leadership and mentorship to other engineers. They own the full lifecycle of system components, from conceptual design and implementation to deployment, monitoring, and iterative improvement. The role demands a unique blend of deep technical expertise and strategic vision. Typical skills and requirements include extensive experience with systems programming languages such as C++, Go, Java, or Rust, and a profound understanding of computer science fundamentals like data structures, algorithms, operating systems, and networking. Expertise in distributed systems concepts—including consensus, consistency, and fault tolerance—is paramount. These engineers are proficient in profiling and debugging complex systems, often needing to trace issues from high-level application logic down to native code or kernel interactions. A performance-first mindset, experience with cloud-native technologies and containerization, and a strong grasp of CI/CD pipelines and observability tools are standard expectations. Leadership skills are crucial, as these senior professionals champion technical excellence, drive architectural decisions, and elevate the entire engineering organization through mentorship and the establishment of a culture focused on robustness and scalability. For those seeking to solve the most challenging engineering problems and build the bedrock upon which digital experiences stand, exploring Senior Software Engineer - Systems jobs offers a career path defined by high impact, continuous learning, and shaping the technological future of an organization.

Filters

×
Countries
Category
Location
Work Mode
Salary