Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Develop cutting-edge applications and services in an Agile environment.
- Company: Join System1, a leader in predicting and improving marketing effectiveness for top advertisers.
- Benefits: Enjoy flexible hybrid working, health insurance, education reimbursement, and fun social events.
- Why this job: Make a real impact on global strategy while working with innovative technology and a supportive team.
- Qualifications: 4+ years of development experience, expert in React, and proficient in C#/.NET Core.
- Other info: We celebrate diversity and support candidates with reasonable adjustments throughout the recruitment process.
The predicted salary is between 36000 - 60000 £ per year.
About System1
System1 is the Creative Effectiveness Platform. Our target customers are the world’s largest advertisers. We predict and improve marketing effectiveness. Our advertising and idea tests measure emotion to give our customers the most accurate predictions of the business impact of creativity. This role plays a key part of our development team in ensuring that we deliver the smartest technology to our clients.
We are looking for a talented and experienced person to join our IT Team as a React Full Stack Developer responsible for helping us build performant and cutting-edge applications and services for use by our customers and staff, showing passion, pride and commitment in your work. This is a perfect opportunity for you if you want to make an impact on our global strategy and growth!
What will you be doing?
- Working on our products to develop systems within an Agile delivery approach that supports incremental development of high-quality, fully tested application component delivery every 2 weeks
- Conduct unit testing, load testing, troubleshooting, and performance tuning as required
- Actively participate in the full system lifecycle including analysis, planning, implementation, testing, release, documentation, and operation
- Create and maintain software documentation
You need to be this kind of person:
- Organised and self-motivated team player
- Have a keen eye for best practices and design patterns
- Ability to champion new ideas, coding styles and develop new approaches
- Excellent problem solver with an attention to detail without getting lost in it
You need to have the following experience:
- Minimum of 4+ years as a Developer
- Highly proficient or Expert in React
- Proficient in Redux or other state management
- Moderate C# / .NET Core
- Moderate Entity Framework
- Good knowledge of MSSQL
It would be an advantage if you have experience in:
- Typescript, StyledComponents, Storybook, Jest, D3, NPM
- Webpack
- Website Accessibility
- Python or AI project experience
- Azure DevOps, Azure Pipelines and Repos
- Unit Testing
- Microservices
- Scrum
We offer a competitive salary and bonus scheme, including health insurance, and pension. Our people are important to us, and we understand that each person has a life outside of work and we therefore offer flexible working arrangements (Hybrid) aiming to suit your needs. We also offer several wellbeing resources such as “de-clutter” afternoons for your personal and professional needs. We encourage learning and offer education reimbursement opportunities. We have recognition schemes, and regular socials, including summer and winter parties! We welcome applicants from all diverse communities and encourage our candidates to ask us about reasonable adjustments that we may be able to make to support through our recruitment process and while in post.
Mid-Level React Fullstack Developer employer: System1 Group PLC
Contact Detail:
System1 Group PLC Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Mid-Level React Fullstack Developer
✨Tip Number 1
Familiarise yourself with the latest trends in React and full-stack development. Being up-to-date with the latest features and best practices will not only enhance your skills but also show us that you're passionate about your craft.
✨Tip Number 2
Engage with our community on platforms like GitHub or Stack Overflow. Contributing to open-source projects or answering questions related to React can help you build a strong online presence and demonstrate your expertise.
✨Tip Number 3
Prepare to discuss your previous projects in detail, especially those involving Agile methodologies. We value candidates who can articulate their experiences and how they contributed to successful project outcomes.
✨Tip Number 4
Showcase your problem-solving skills by preparing for technical interviews. Practice coding challenges and be ready to explain your thought process, as we appreciate candidates who can think critically and creatively under pressure.
We think you need these skills to ace Mid-Level React Fullstack Developer
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights your experience with React, Redux, and any other relevant technologies mentioned in the job description. Use specific examples of projects you've worked on that demonstrate your skills and achievements.
Craft a Compelling Cover Letter: Write a cover letter that not only outlines your technical skills but also reflects your passion for the role and the company. Mention how your experience aligns with System1's mission to improve marketing effectiveness and how you can contribute to their goals.
Showcase Your Problem-Solving Skills: In your application, provide examples of how you've tackled complex problems in previous roles. Highlight your attention to detail and ability to implement best practices, as these are key traits they are looking for.
Highlight Team Collaboration: Since the role requires being a self-motivated team player, include examples of how you've successfully collaborated with others in an Agile environment. Discuss your experience in participating in the full system lifecycle and how you contribute to team success.
How to prepare for a job interview at System1 Group PLC
✨Showcase Your React Expertise
Make sure to highlight your proficiency in React during the interview. Be prepared to discuss specific projects where you've used React, and explain the challenges you faced and how you overcame them.
✨Demonstrate Problem-Solving Skills
Expect to encounter technical questions or coding challenges that assess your problem-solving abilities. Practice common algorithms and data structures, and be ready to explain your thought process as you work through problems.
✨Familiarise Yourself with Agile Methodologies
Since the role involves working within an Agile delivery approach, brush up on Agile principles and practices. Be ready to discuss your experience with Agile teams and how you contribute to iterative development cycles.
✨Prepare Questions About Company Culture
System1 values its people and offers flexible working arrangements. Prepare thoughtful questions about the company culture, team dynamics, and opportunities for professional development to show your genuine interest in joining their team.
