Lumine Group
Principal Developer

How your CV stacks up
Upload your CV to see how well it fits this job role
?%
Principal Software Developer
Lifecycle provide billing solutions to a number of high-profile customers in the telecommunications industry. Due to continued growth and increasing sales success, we are looking for a Principal Software Developer to join the team. If you are passionate about creating innovate customer solutions, have significant coding experience and have worked in an environment requiring attention to detail and fast solution turn around you are the person we are looking for.
The role will involve developing enterprise web applications taking advantage of open source Java technologies. As well as developing new products, the successful candidate will also create new and exciting features for our core products in the telecommunication and online payment sectors. You’ll be involved in all stages of the development process, from analysis and design to implementation and testing. Working in an agile environment, the successful candidate requires the ability to both work in a team and individually.
Primary Role
At Lifecycle the Development Team are responsible for delivering high quality solutions to our wide range of customers and responding to Change Request applications.
You will work as a senior leader in a multidisciplinary team to ensure close alignment to the technical strategy and development standards that you will also help shape and embed. You will be passionate about working on complex puzzles to benefit the smooth running the business. You are invested in developing the capability of colleagues around you, helping to shape career paths and working generously to share your own expertise and learning. You enjoy working closely with customers, learning of their needs, and translating these to features. You are confident operating to agile principles and will thrive on collaborating with technical minds across Software Engineering, as well as other teams. You will strive to remain close to the detail on emerging technologies, identifying, testing and championing their adoption where appropriate.
Key Accountabilities
- Setting Technical Direction: Establish a clear technical vision for the company or team, aligning it with the overall business strategy. This includes defining technology standards, tools, and practices, and ensuring they are up-to-date with industry trends. The goal is to create a roadmap that guides all technical decisions and development efforts.
- Identifying Technology Strategic Growth Opportunities: Looking for new technologies, methodologies, or market trends that can be leveraged to enhance the company's product offerings or operational efficiency. This involves staying informed about emerging technologies and assessing their potential impact on the business.
- Communicating Multi-Year Technical Strategy: Articulating a long-term vision for the company's technology development, including milestones and objectives. This requires effective communication skills to ensure that all stakeholders, from team members to upper management, understand and are aligned with the strategy.
- Providing Training/Mentoring to Other Engineers: Foster the growth and development of fellow engineers through knowledge sharing, coaching, and offering constructive feedback. Including formal training sessions, one-on-one mentoring, or creating educational materials.
- Designing, Coding, and Debugging Software: This covers the entire software development lifecycle, from conceptualizing and creating new software applications to identifying and fixing bugs in existing software.
- Improving Performance of Existing Software: Optimizing code, enhancing features, and ensuring the software remains efficient and effective. It requires regular review and updates to maintain high performance standards.
- Maintaining and Upgrading Existing Software: Regular updates and maintenance of software applications to ensure they remain secure, efficient, and relevant. Involving patching security vulnerabilities, updating features, or adapting software to new hardware or operating systems.
- Recommending New Technologies to Increase Productivity: Stay abreast of the latest technological advancements and recommending tools, frameworks, or practices that can enhance team productivity and product quality.
- Supervising and Overseeing Technical Aspects of Projects: Manage the technical elements of a project, from initial design to final implementation, ensuring that all technical requirements are met and align with the project's goals.
- Sharing Knowledge through Presentations: Share expertise and insights with the team or the wider organization through presentations, which helps in spreading knowledge and encouraging a learning culture within the organization.
- Encoding Knowledge in Libraries and Tools for Wider Use: Create reusable code libraries or tools that can be utilized across the company or shared with the broader software community. Involving identifying common challenges and developing solutions that can be widely adopted.
- Being Data-Driven: Use data analytics to make informed decision-making processes. This involves gathering and analysing data to understand trends, measure performance, and identify opportunities for improvement or innovation.
Reasons to use Rodeo
I’m in my final year doing Economics and I don’t know whether to apply for grad schemes now or do a masters first. What do you think?
Honest answer — it depends on where you want to end up. A lot of top grad schemes (Big 4, civil service, banking) don’t need a masters. Let’s look at the ones you’d be competitive for now, and we can decide if a masters actually adds anything.
Also worth knowing: most autumn 2026 applications are open now. Timing matters more than you think.
Start with a chat, not a search bar
Grad scheme, placement, apprenticeship? Not sure what you want yet — that's fine. Your agent talks it through with you and turns "I have no idea" into a shortlist.
Graduate Consultant — 2026 Scheme
Why you're a good match
StrongYour economics background and your summer at a regional bank line up with what PwC looks for on the consulting scheme. Applications close in four weeks.
See breakdownIt searches the market for you
Every day your agent scans the market matching roles against what actually matters to you, not just keywords on a CV.
Why you're a good match
You’ve got the grades and the economics background, and your bank internship is exactly the experience this scheme looks for. Apply soon — deadlines close within the month.
Experience fit
Your summer at the bank plus your econometrics coursework map directly to the day-one responsibilities on this scheme — client modelling, market briefings, and deal support.
Only hits
No noise. No "maybe this fits." Just roles with a clear explanation of why they're right — and where to focus when applying.
Required employee skills and attributes


Get help with your application
Your very own career expert that helps elevate your application to the next level.
Essential
- Java or Kotlin (JVM 11+)
- Spring Framework - Spring Boot, Spring Cloud, Spring Libraries including JDBC, R2DBC, MongoDB, Redis, Elasticsearch, Caching
- Web Technologies (at least one of) - Spring MVC, JSF (IceFaces), Struts, Wicket
- Hibernate or other ORM
- Build Tools - Maven, GitHub Actions
- JavaScript Frameworks (at least one of) – React, Angular (8+)
- SQL Database technologies (at least one of) - SQL Server, PostgreSQL
- No SQL Databases (at least one of) – Redis, MongoDB, Elasticsearch
- Message Brokers – RabbitMQ
- Microservice Architecture - Docker Deployments, Kubernetes, Helm Deployments
- Working with Git source control
Desirable
- Telecoms billing processes and/or systems
- Online Charging Systems - Diameter protocol, Radius protocol
- CRM processes/systems
- Linux Operating Systems
- Web Services: SOAP and Rest
- IT networking
- CI/CD
- The Atlassian Suite (JIRA, Confluence, Bitbucket, Bamboo)
- Azure Services
- Machine learning algorithms
- Big Data (Hadoop, Azure Data Lake, S3, Apache Spark)
- Additional programming languages – Python, Scala, Typescript, CSS 3/SASS (or other pre-processors)
Other Information
The successful candidate will be rewarded with competitive salary, and technically challenging, cutting edge projects. It is important that the successful candidate has a passion for learning new technologies.
The vacancy is a hybrid-remote role and the successful candidate will be a self-starter who is willing to work autonomously. Relocation candidates considered.
The benefits package includes 24 days holiday plus ‘your birthday off’, private medical life assurance, critical illness, employee assistance program and a contributory pension.
“It took my CV and asked me questions relevant to understanding what kind of jobs to suggest for me. Suggestions were almost perfect. Jobs were exactly what I’ve been looking for.”
Jessica, London
Skills
Location