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Senior Engineer, Software Poland Jobs

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Senior Software Engineer (PHP)
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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...
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Poland
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Supermetrics
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Senior Software Engineer - C# OR Java
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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 ...
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Poland , Gdansk
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Mastercard
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Senior Software Engineer - Backend
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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...
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Poland , Łódź
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Arrive
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Senior Software Engineer (Python)
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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...
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Poland
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Supermetrics
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Senior Software Engineer
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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...
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Poland
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Paymentology
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Senior Backend Software Engineer
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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.
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Poland , Gdańsk
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Atlassian
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Senior Software QA Engineer
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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...
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Poland , Warsaw
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Inetum
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Senior Python Software Engineer
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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...
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Poland , Warsaw
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Inetum
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Senior Software QA Engineer
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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.
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Poland , Warsaw
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Inetum
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Senior .Net Software Engineer
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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.
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Poland , Warsaw
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Inetum
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Senior JVM Software Engineer
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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...
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Poland , Warsaw
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Inetum
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Senior iOS Software Engineer
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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...
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Poland , Warsaw
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Inetum
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Senior Python Software Engineer
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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.
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Poland , Warsaw
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Inetum
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Senior Java Software Engineer
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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...
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Poland , Warsaw
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Inetum
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Senior Full Stack Software Engineer
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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.
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Poland , Gdańsk
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244800.00 - 326400.00 PLN / Year
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Atlassian
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Senior JVM Software Engineer
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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...
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Poland , Warsaw
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Inetum
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Senior JVM Software Engineer
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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 ...
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Poland , Kraków
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Inetum
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Senior Software Engineer
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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...
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Poland , Kraków
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Montrose Software
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Senior JVM Software Engineer
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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...
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Poland , Poznań
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Inetum
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Senior JVM Software Engineer
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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.
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Poland , Warsaw
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Inetum
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Explore a world of opportunity with Senior Engineer, Software jobs. A Senior Software Engineer is a pivotal, experienced professional who architects, builds, and maintains complex, high-impact software systems. This role represents a significant step beyond mid-level positions, emphasizing technical leadership, strategic decision-making, and deep ownership over critical components of a product or platform. Professionals in these jobs are entrusted with translating high-level business requirements into robust, scalable, and efficient technical solutions, often mentoring junior engineers and shaping the team's technical direction. The typical responsibilities of a Senior Software Engineer are comprehensive and demand a high degree of accountability. They are commonly responsible for the end-to-end ownership of major features or entire services, from design and implementation through testing, deployment, and ongoing optimization. This involves writing high-quality, maintainable code, conducting thorough code reviews, and advocating for best practices in software development. A key aspect of the role is solving complex, often ambiguous problems, requiring innovative thinking to improve system design, performance, and reliability. Senior engineers also frequently analyze and debug intricate production issues, provide technical guidance to cross-functional partners like product managers, and contribute to architectural discussions that define the future of the technology stack. To excel in Senior Engineer, Software jobs, a specific set of skills and experience is typically required. A strong foundation in computer science fundamentals, data structures, algorithms, and system design is non-negotiable. Candidates usually possess 5+ years of professional software development experience, with deep proficiency in one or more programming languages such as Java, Python, C++, JavaScript/TypeScript, or Go. Expertise in modern development paradigms is essential, including cloud-native architectures (AWS, Azure, GCP), microservices, containerization (Docker, Kubernetes), and both SQL and NoSQL databases. Beyond technical prowess, senior roles demand excellent problem-solving and analytical abilities, the capacity to design systems for scale and resilience, and strong communication skills to articulate technical concepts to diverse audiences. A proven ability to work autonomously, drive projects to completion, and collaborate effectively within a team are the hallmarks of a successful candidate for these advanced software engineering jobs. Ultimately, Senior Engineer, Software jobs are for those who are passionate about technical excellence and impact. These positions offer the chance to work on challenging problems, influence product strategy, and build systems that serve millions of users. Whether specializing in backend distributed systems, full-stack applications, embedded systems, or cloud infrastructure, senior software engineers are the cornerstone of innovation and operational stability in the modern digital landscape.

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