Software Engineer

BlackLine; Kraków; Hybrid; PLN 201,000 - 252,000; Full time

Job summary

BlackLine in Krakow is seeking a Front-End Software Engineer on the UI Platform team. This hands-on role focuses on React development, building and maintaining our shared component library and the App Shell to power the enterprise web platform.

You will collaborate with senior engineers, migrate legacy .NET apps to modern React micro-frontends, and work with Java backend services in a cloud-native setup using GCP, Jenkins, GitHub Actions, and Terraform.

Qualifications

• 2–4 years professional software development experience.
• Strong proficiency in JavaScript/TypeScript and React.
• Hands-on backend experience with Java services.
• Experience with cloud-native architectures and CI/CD.

Responsibilities

• Develop and maintain a React-based component library.
• Contribute to the App Shell and micro-frontends.
• Migrate legacy .NET apps to React-based solutions.
• Implement and maintain backend Java services.
• Work with Cloud/DevOps tools and CI/CD pipelines.
• Write tests and ensure code quality.
• Collaborate with senior engineers and perform debugging.

Skills

JavaScript/TypeScript

React

Backend Java

Cloud & DevOps

Tools

GCP

Jenkins

GitHub Actions

Terraform

Webpack

npm

Job description

## Software EngineerApply: Hybrid: Krakow: Full time: Posted Today: 001877**Make Your Mark:**Join BlackLine as a Front-End Software Engineer on the UI Platform team. This role has a primary focus on front-end development, mainly in React, including our shared component library and the App Shell that powers our enterprise web platform. Alongside this, you will build hands-on, practical experience with Java backend services, cloud architecture, and CI/CD — not just theoretical knowledge, but real work implementing and deploying backend and infrastructure changes. This is a hands-on coding role where you will grow your skills in a complex, cloud-native environment. You will work closely with senior engineers to implement features, fix bugs, and improve the reliability of our front-end platform infrastructure. **You'll Get To:*** **Component Library Development:** Develop and maintain our shared **React**-based component library: building new components and enhancing existing ones to ensure a consistent, scalable UI across the platform.* **App Shell Development:** Contribute features and improvements to the **React**-based micro-frontend App Shell, ensuring seamless inter-app communication.* **Modernize & Migrate:** Contribute to the migration from legacy applications (.NET) to modern **React**-based solutions with micro-frontend architecture.* **Backend Development:** Implement and maintain backend services in **Java**: hands-on coding, not just supporting role, including writing and debugging production logic that the front end depends on.* **Cloud & DevOps:** Work directly with cloud-native architecture (e.g., **GCP**), configure and monitor **CI/CD** pipelines (**Jenkins**, **GitHub Actions**), and participate in cloud deployments using **Terraform**.* **Code Quality:** Write clean, maintainable front-end code following solid best practices. Write tests (unit, integration) to ensure high coverage and stability.* **Collaboration:** Participate in code reviews, learn from senior mentors, and collaborate with other developers to resolve full-stack issues.* **Troubleshooting:** Help debug issues primarily on the front end (browser console, UI behavior), with occasional support on backend API issues. **What You'll Bring:*** **Experience:** 2–4 years of professional experience in software development.* **Core Technologies:** Strong proficiency in **JavaScript/TypeScript** and **React** (primary focus), combined with **practical, hands-on experience** building and maintaining backend services in **Java** — not only theoretical knowledge.* **Cloud & DevOps Experience:** Practical experience with cloud-native architecture, particularly **GCP** (or comparable major cloud platforms), and real-world exposure to **CI/CD** pipelines (**Jenkins**, **GitHub Actions**) and infrastructure-as-code tools such as **Terraform**.* **Development Lifecycle:** Solid understanding of the full **SDLC**, from analyzing stakeholder requirements to technical implementation.* **Tooling:** Familiarity with modern build tools (**Webpack**, **npm**).|* **Soft Skills:** Strong problem-solving skills, attention to detail, and a proactive attitude towards learning new technologies like design systems, micro-frontends, and cloud architecture. Total Base Pay Range + 201 000,00 - 252 000,00 PLN annual **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.