At a Glance
- Tasks: Design and develop innovative software solutions for telecoms, tackling complex challenges.
- Company: Join Cerillion, a leading tech provider with over 25 years of experience.
- Benefits: Enjoy 23 days annual leave, healthcare cover, and training opportunities.
- Other info: Work in a vibrant Covent Garden office with great team events.
- Why this job: Make a real impact in a dynamic environment while mentoring junior developers.
- Qualifications: Degree in Computer Science or related field; strong Java and Agile experience required.
The predicted salary is between 56700 - 69300 £ per year.
Cerillion is a leading provider of billing, charging and customer management systems with more than 25 years’ experience delivering its solutions to the telecoms sector. We are looking for a Senior Developer to join our Software Engineering team in London. This role is ideal for a hands-on technologist who enjoys tackling complex business challenges and delivering high-quality software solutions. The successful candidate will be responsible for technical design, development, and delivery of enhancements to Cerillion’s core BSS/OSS products. You will work closely with project managers, architects, and cross-functional development teams to ensure the delivery of robust, scalable, and maintainable systems. As part of this role, you will also mentor junior developers and contribute to code quality and process improvement initiatives.
Key responsibilities include:
- Understand customer business and R&D requirements.
- Analyse existing system functionality and design gaps.
- Participate in requirements and design discussions with architects and analysts.
- Design and develop customisations to Cerillion’s core BSS products, including CRM, Mediation, Charging and Rating, Billing, Bill Printing, Credit Control, Provisioning, Product Catalogue, and Self Service.
- Develop new R&D features and modules for inclusion in the product suite.
- Perform code reviews, unit testing, and ensure compliance with development standards.
- Work collaboratively in Agile environments and contribute to sprint planning and estimations.
- Support bug fixing, performance optimisation, and integration testing.
- Provide build and release instructions to DevOps and QA teams.
- Support build and deployment processes, ensuring smooth release cycles and quality assurance.
- Report project/task status, risks, and issues to the Software Engineering Manager.
- Mentor developers and assist in technical troubleshooting and solutioning.
- Contribute to technical design documentation and best practice guidelines.
What we are looking for in our next Senior Developer:
- Educated to degree level (or equivalent) in Computer Science, Software Engineering, or a related discipline.
- Extensive experience in software design and development using Java-based technologies.
- Experience in technical leadership or senior developer roles.
- Experience working on high-transaction, large-scale systems in telecoms, billing, or similar enterprise domains preferred.
- Strong expertise in Java, Spring Boot, and J2EE.
- Hands-on experience with RESTful APIs, Microservices, and Containerisation (Kubernetes/OpenShift).
- Solid understanding of RDBMS, SQL, and PL/SQL.
- Familiarity with application servers such as JBoss or Oracle 10gAS.
- Proficiency in Git-based source control, debugging, and build tools (e.g., Maven, Jenkins).
- Knowledge of software development lifecycle (SDLC) and Agile methodologies.
What we provide:
- 23 days annual leave (+ bank holidays), increasing to 28 days after 5 years’ service.
- Vitality healthcare cover.
- Opportunities for internal and external training.
- Employee Assistance Program.
- Opportunities for travel.
- An office in the heart of Covent Garden, providing an excellent base for our team events and social functions.
Senior Developer in London employer: Cerillion Americas
Cerillion is an exceptional employer that fosters a collaborative and innovative work culture, making it an ideal place for professionals in the telecoms sector. With a focus on employee growth and development, team members benefit from diverse opportunities to enhance their skills while working in a vibrant Covent Garden office, which serves as a dynamic hub for our international team. The modest travel requirements allow for a balanced work-life experience, ensuring that you can thrive both personally and professionally.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Developer in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Cerillion Americas or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Cerillion Americas.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Cerillion Americas.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Cerillion Americas that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Senior Developer in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Cerillion Americas.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Cerillion Americas and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Cerillion Americas
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Cerillion Americas uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
