Software Engineer (React Native)

Software Engineer (React Native)

Join HL Tech and be part of the team, building software for the UK’s largest investment platform.

HL Tech is the technology hub of Hargreaves Lansdown (HL) – a FTSE 100 company and the UK’s number one platform for private investors, trusted by 1.9 million clients with over £155 billion in savings and investments. For over 40 years, HL has been helping people save and invest for a better future, earning over 200 industry awards, including Best Investment

App and Best for Customer Service in 2024.

At HL Tech, we are an integral part of HL Group, working hand in hand with teams in the UK to develop software that directly supports HL’s core services. Our solutions are used daily by millions of clients, helping to power the operations of a leading financial institution.

We’re a team of 80 passionate tech professionals in Warsaw, collaborating closely with colleagues in the UK. Our culture is built on innovation, knowledge sharing, and continuous improvement—and we're looking for talented engineers to join a team developing mobile products using React Native and TypeScript. If you enjoy working with clean architecture, modern technologies, and being part of a supportive team that learns from each other, we’d love to hear from you!

Most colleagues work remotely, but you can also work from our office in WeWork Mennica Tower in central Warsaw. Please note, all work must be performed within Poland, as remote work from abroad is not allowed.

Why join us?

• Work the way you want – fully remote from anywhere in Poland or hybrid from our modern WeWork office at Mennica Tower (Warsaw). We have solutions for regular employees and B2B.
• New products, no maintenance – focus on building innovative solutions from scratch, using the latest technologies.
• Healthy work-life balance – we value your time, which means no overtime culture.
• Be part of something big – your work directly supports a FTSE 100 leader trusted by millions.
• Supportive, knowledge-sharing team – collaborate with experienced engineers who are passionate about clean code, best practices, and continuous learning.
• Modern tools & technologies – develop enterprise-scale solutions in a tech-driven environment.

Your responsibilities

• Develop and maintain mobile applications using React Native and TypeScript.
• Integrate with backend services via REST API and/or GraphQL.
• Work with React Native’s new architecture, applying best practices for scalability and performance.
• Write unit and integration tests using tools like Jest, Detox, and Testing Library.
• Optimize the performance of mobile applications.
• Implement and manage state management solutions (e.g., Redux, Mobx).
• Collaborate with backend teams and designers to ensure consistency and high- quality deliverables.
• Contribute to CI/CD processes and support build automation.
• Troubleshoot complex technical issues and help scale mobile applications.
• Actively participate in the Scrum process (stand-ups, retrospectives, and technology discussions).
• Propose ideas, contribute to technology choices, and present solutions to the team.

Must have

• At least 3 years of experience working with React Native and TypeScript including enterprise-grade experience (experience with large app decomposition, layers separation, and scalable architecture for enterprise-level applications).
• Familiarity with different styling solutions (StyleSheet, Styled Components, Unistyles).
• Efficient React Native debugging skills — ability to troubleshoot and resolve complex issues with React Native applications using debugging tools, logs, and error tracking.
• Practical knowledge of JavaScript and testing frameworks (Jest, Detox, Testing Library).
• Experience in Brownfield Development.
• Experience working with REST API and GraphQL.
• Understanding of state management patterns and solutions like Redux and Mobx.
• Experience with React Native’s new architecture.
• Knowledge of native iOS development (Swift, SwiftUI, Combine) and Android development (Kotlin). Proficiency in using native build tools like Xcode, Gradle, and Android Studio.
• C1-level proficiency in English and at least communicative level (B2) of Polish – you will use both languages in all aspects of your daily work.



Nice to have

• Knowledge of CI/CD processes in software development.
• Experience integrating mobile apps with external services.
• Experience with TurboModules and TurboComponents.
• Experience with accessibility (a11y) best practices in mobile apps, including WCAG compliance and keyboard navigation support.
• Experience with UX/UI design best practices

Soft skills & team fit

• Collaborative and communicative – you work well with others, share knowledge, and express ideas clearly.
• Solution-oriented and creative – you tackle challenges with practical, innovative solutions.
• Quality-driven with a continuous improvement mindset – you take pride in delivering clean, secure, and maintainable code while seeking ways to improve.
• Eager to learn and adapt – you embrace new ideas and grow with your team.
• Comfortable in Agile environments – you thrive in cross-functional collaboration and value constructive feedback.

Benefits

• Copy rights (50% tax relief due to creative type of work)
• PPE (4% employer contribution without any additional cost nor employee contributions required)
• Annual bonus depending on performance
• Conference & Training budget
• English lessons with native speakers
• Private health care & Life insurance
• MyBenefit Cafeteria (benefits platform)
• 2 additional days for volunteering events
• Team events
• Buddy programme
• Opportunity to grow according to your level of expertise
• Working with new technologies and a multi-diverse team
• Many opportunities to share knowledge and ideas
• In-house Trainings