Senior Software Engineer

BlackLine; Kraków; On-site; PLN 133,920 - 167,400; Full time

Benefits offered by this job

Professional development seminars

Inclusive affinity groups

Job summary

A leading financial software provider in Poland seeks a Senior Full-Stack Engineer. In this role, you'll build and maintain the core App Shell, operate between domains, and ensure seamless integration in a micro-frontend ecosystem. Responsibilities include designing scalable features, migrating legacy apps to modern solutions, and mentoring junior engineers. With 4–8 years in full-stack development, expertise in Java and React is essential. Join this innovative team committed to transforming finance through technology.

Qualifications

• 4–8 years of professional experience in full stack software development.
• Strong expertise in Java and React with TypeScript.
• Solid experience with major cloud platforms and cloud-native services.
• Experience managing the software development lifecycle.
• Hands-on experience with CI/CD tools.

Responsibilities

• Design and implement scalable features across the stack.
• Execute migration from legacy applications to modern solutions.
• Build and maintain cloud-native infrastructure.
• Write clean and secure code, implementing comprehensive testing.
• Mentor junior engineers and conduct code reviews.

Skills

Java

React

TypeScript

Terraform

Jenkins

GitHub Actions

OOP

CI/CD

Job description

5 days ago Be among the first 25 beautify applicants

Get to Know Us

It’s fun to work in a company where people truly believe in what they’re doing! At BlackLine, we’re committed to bringing passion and customer focus to vrat business of enterprise applications. Since being founded in 2001, BlackLine has become a leading provider of cloud software that automates and controls the entire financial close process. Our vision is to modernize the finance and accounting function to enable greater operational effectiveness and agility, and we are committed to delivering innovative solutions and services to empower accounting and finance leaders around the world to achieve Modern Finance. Being a best‑in‑class SaaS Company, we understand that bringing in new ideas and innovative technology is mission critical. At BlackLine we are always working with new, cutting‑edge technology that encourages our teams to learn something new and expand their creativity and technical skillset that will accelerate their careers. Work, Play and Grow at BlackLine!

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 this킬 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 socialize-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_PROCESSED 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.

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 乐友 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 environment.

Soft Skills

kie Ability to work independently on complex tasks, estimate delivernante accurately, and collaborate effectively in an Exploit 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).

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.

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Engineering and Information Technology

Industries

Software Development

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 have 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.

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