BlackLine

Senior Software Engineer

Poland · Hybrid · Full time

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About the role

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EmployerBlackLine
LocationPoland
Work styleHybrid
Employment typeFull time
Employer posted20 Jul 2026

Make Your Mark:

BlackLine¯SaaS is the system of interaction for finance and accounting teams and it integrates with numerous ERPs, CRMs, Payment systems, Point of Sale systems and other applications. Join BlackLine as a Senior Full-Stack Engineer on the UI Platform team. In this role, you will be responsible for building and maintaining the core App Shell and the services that power our micro-frontend ecosystem. You will operate as a bridge between domains, implementing robust backend logic in Java and sophisticated UI orchestration in React. You will help define integration strategies and ensure our platform leverages modern cloud capabilities, enabling other product teams to ship value faster and more securely.

You'll Get To:

Component Development: Design and implement scalable features across the stack
from Java microservices to React-based front-end shells
ensuring seamless inter-app communication.
Modernize & Migrate: Execute migration from legacy applications (.NET) to modern React-based solutions with micro-frontend App Shell architecture.
Cloud & Platform Implementation: Build and maintain cloud-native infrastructure and deployment pipelines using Terraform, Jenkins, and GitHub Actions.
Quality & Standards: Write clean, secure, and testable code. Implement comprehensive testing strategies (Unit, Integration) using tools like JUnit for backend and Jest/Vitest/Playwright for front-end.
Mentorship: Mentor junior engineers, conduct code reviews, and contribute to the team's knowledge base regarding full stack best practices.

Show full description

What You'll Bring:

Experience: 4-8 years of professional experience in full stack software development.
Core Technologies: Strong expertise in Java (OOP) and React with TypeScript
Cloud Proficiency: Solid experience with major cloud platforms (AWS, Azure, or GCP) and experience utilizing cloud-native services (serverless, managed databases, container orchestration).
SDLC Ownership: Experience managing the lifecycle from translating stakeholder requirements into technical specifications through to final delivery.
DevOps Mindset: Hands-on experience with CI/CD tools (Jenkins, GitHub Actions) and operating in a DevOps Soft Skills: Ability to work independently on complex tasks, estimate deliverables accurately, and collaborate effectively in an agile environment

We’re Even More Excited If You Have:

Micro-Frontend Experience: Experience with or working knowledge of micro-frontend architectures (Webpack Module Federation) and modern build tools (Vite, Rollup).

Salary Range
PLN 254,000.00 - 318,000.00 /Yr.

Thrive at BlackLine Because You Are Joining:

A technology-based company with a sense of adventure and a vision for the future. Every door at BlackLine is open. Just bring your brains, your problem-solving skills, and be part of a winning team at the world's most trusted name in Finance Automation!
A culture that is kind, open, and accepting. It's a place where people can embrace what makes them unique, and the mix of cultural backgrounds and varying interests cultivates diverse thought and perspectives.
A culture where BlackLiner's continued growth and learning is empowered. BlackLine offers a wide variety of professional development seminars and inclusive affinity groups to celebrate and support our diversity.

BlackLine is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity or expression, race, ethnicity, age, religious creed, national origin, physical or mental disability, ancestry, color, marital status, sexual orientation, military or veteran status, status as a victim of domestic violence, sexual assault or stalking, medical condition, genetic information, or any other protected class or category recognized by applicable equal employment opportunity or other similar laws.

BlackLine recognizes that the ways we work and the workplace itself has shifted. We innovate in a workplace that optimizes a combination of virtual and in-person interactions to maximize collaboration and nurture our culture. Candidates who live within a reasonable commute to one of our offices will work in the office at least 3 days a week.

Accommodations:

BlackLine is committed to creating an inclusive and accessible experience for all candidates. If you require a reasonable accommodation that would better enable your success during the application or interview process, please complete this form.

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