Introduction to Cerillion

Cerillion is a world-leading provider of billing, charging, and customer management software solutions, headquartered in London, United Kingdom. With over two decades of expertise, Cerillion has established itself as a dominant force in the telecommunications BSS/OSS (Business Support Systems / Operations Support Systems) market. The company serves over 100 customers in more than 45 countries, including major telecom operators like Vodafone, BT, and Telenor. Cerillion's flagship product, the Cerillion Enterprise BSS/OSS platform, enables service providers to monetize next-generation services such as 5G, IoT, and cloud communications. With annual revenues exceeding £30 million and a workforce of over 400 professionals, Cerillion is recognized by industry analysts like Gartner and Ovum as a Leader in the telecom BSS space. The company’s commitment to innovation and customer success makes it a top Technology employer in the UK and globally.

Company History and Business Evolution

Cerillion was founded in 1999 by Louis Hall after identifying a market gap for flexible, scalable billing solutions in the nascent mobile telecom industry. The company initially focused on prepaid billing systems for emerging markets, delivering its first deployment in 2001. Over the following years, Cerillion expanded its product suite to include postpaid billing, interconnect management, and CRM capabilities. In 2008, Cerillion launched its cloud-based BSS platform, pioneering the shift to SaaS in telecom. The acquisition of ServiceTec in 2012 expanded its OSS portfolio, adding network management and service assurance. In 2016, Cerillion went public on the AIM market of the London Stock Exchange (CER.L), raising capital to fuel further growth. The company celebrated its 20th anniversary in 2019 by launching its 5G Monetization Suite. In 2021, Cerillion acquired the telecom billing assets of MDS Global, strengthening its position in the SME market. Today, Cerillion continues to innovate with AI-driven analytics, digital self-service portals, and partner ecosystem management.

Cerillion at a Glance

• Headquarters: London, United Kingdom (also offices in India, United States, and UAE)
• Founded: 1999 by Louis Hall
• CEO: Louis Hall
• Revenue: £34.2 million (FY2023)
• Employees: 400+ globally
• Industry: Telecommunications – BSS/OSS software
• Stock Symbol: AIM: CER.L
• Key Products: Cerillion Enterprise BSS/OSS, 5G Monetization Suite, Revenue Management, CRM, Mediation
• Customers: 100+ in 45+ countries including Tier-1 operators
• Analyst Recognition: Gartner Magic Quadrant Leader for Telecom BSS, Ovum Decision Matrix Leader
• Global Presence: UK, India, USA, UAE, South Africa, Singapore
• Awards: Telecom Asia BSS Innovation Award, Frost & Sullivan Best Practices Award
• Technology Stack: Java, Oracle, Cloud (AWS, Azure), AI/ML, Microservices
• Certifications: ISO 9001, ISO 27001
• Average Employee Tenure: 6.5 years
• Female Workforce: 28%
• R&D Spend: 15% of revenue annually
• Product Releases: Quarterly releases with CI/CD pipeline
• Partners: Oracle, Amazon Web Services, Salesforce, Ericsson
• Customer Satisfaction Score: 4.7/5 based on internal surveys

Mission, Vision, and Core Corporate Values

Cerillion’s mission is to empower telecommunications and digital service providers with agile, innovative BSS/OSS solutions that accelerate time-to-market and maximize revenue opportunities. The vision is to be the world’s most trusted partner for monetizing the connected world, enabling seamless experiences across 5G, IoT, and digital ecosystems. Core values include: Customer Centricity – putting customer success at the heart of every decision; Innovation – constantly pushing boundaries to stay ahead of industry trends; Integrity – operating with transparency and ethical standards; Collaboration – fostering teamwork across geographies and functions; and Excellence – delivering high-quality solutions that exceed expectations.

Business Strategy and Future Roadmap

Cerillion’s business strategy focuses on three pillars: organic product innovation, strategic acquisitions, and geographic expansion. The company invests heavily in R&D to evolve its Enterprise BSS/OSS platform, ensuring it supports the latest technologies such as network slicing, edge computing, and real-time charging. Cerillion aims to deepen its footprint in the Asia-Pacific and Latin American markets, where telecom digitization is accelerating. The roadmap includes launching a fully cloud-native microservices-based platform by 2025, integrating AI for predictive analytics and automated customer care, and expanding the partner ecosystem to include more OTT and IoT players. Cerillion also plans to leverage its presence in the public cloud by offering turnkey solutions for MVNOs and digital disruptors.

Products, Technologies, and Services

Cerillion offers a comprehensive portfolio of BSS/OSS products, all built on a modular, API-first architecture. Key products include: Cerillion Enterprise BSS/OSS – an integrated suite covering CRM, product catalog, order management, billing, and revenue assurance; Cerillion 5G Monetization Suite – designed to support complex 5G charging scenarios, including network slicing and dynamic pricing; Cerillion Revenue Management – a real-time rating, charging, and billing engine; Cerillion Mediation – a high-performance data collection and transformation engine; Cerillion Digital Self-Service – a white-label portal for customer care and bill management; and Cerillion Partner Management – enabling wholesale and MVNO partnerships. The technology stack is predominantly Java-based, with Oracle databases, and deployed on private cloud or public cloud (AWS/Azure). Cerillion also offers managed services, system integration, and 24/7 support to ensure smooth operations for clients.

Industries and Markets Served

Cerillion’s core market is telecommunications, serving mobile network operators (MNOs), mobile virtual network operators (MVNOs), fixed-line providers, and cable operators. The solutions also cater to non-telecom industries such as utilities (smart metering billing), financial services (digital banking loyalty programs), and IoT verticals (connected cars, smart cities). Cerillion’s platform is highly configurable, allowing rapid adaptation to different business models – from prepaid and postpaid to hybrid and subscription-based. The customer base ranges from small regional ISPs to global Tier-1 operators with millions of subscribers. Cerillion’s presence in emerging markets is particularly strong, where its flexible billing solutions help operators launch new services quickly.

Leadership and Management Philosophy

Cerillion is led by founder and CEO Louis Hall, who maintains a hands-on approach to product strategy and customer relationships. The executive team includes veterans from telecom software and consulting, fostering a culture of practical innovation. Management philosophy emphasizes empowerment, transparency, and continuous learning. Cerillion operates with flat hierarchies, encouraging open communication across all levels. The leadership believes in investing in people, providing clear career progression paths, and recognizing contributions through performance-based rewards. Decision-making is data-driven, with regular cross-functional reviews to ensure alignment with strategic goals.

Corporate Events, Conferences, and Community Engagement

Cerillion actively participates in major telecom industry events such as Mobile World Congress (MWC Barcelona), TM Forum Digital Transformation World, and Capacity Europe. The company also hosts its own user conferences called “Cerillion Connect,” where customers share best practices and influence product roadmaps. Cerillion engages with the local community through STEM education initiatives, sponsoring hackathons and university partnerships. The company has a corporate social responsibility program focused on digital inclusion, donating software licenses to NGOs in developing countries. Employees are encouraged to volunteer, with up to two paid days per year for charitable activities.

Employees and Workplace Culture

Cerillion prides itself on a collaborative, innovative, and inclusive workplace culture. The global team of over 400 professionals represents 25 nationalities, with a healthy balance of experienced industry experts and fresh talents. The company offers flexible working arrangements, including remote and hybrid options. Cerillion invests in employee development through training certifications, conference attendance, and a mentorship program. The London headquarters features a modern open-plan office with collaboration zones, game rooms, and a rooftop terrace. Employee satisfaction is high, with an average tenure of 6.5 years and a Net Promoter Score (eNPS) of +45. Annual employee engagement surveys drive continuous improvement efforts. Cerillion also promotes health and well-being with gym subsidies, mental health support, and regular team-building outings.

Job Details & Requirements for this Posting (Detailed)

Position: Senior Software Engineer – BSS/OSS Technology
Location: London, UK (with hybrid working options)
Employment Type: Full-time, Permanent
Salary: £70,000 – £90,000 per annum + bonus, stock options, benefits

Role Overview

We are seeking an experienced Senior Software Engineer to contribute to the development and enhancement of Cerillion’s Enterprise BSS/OSS platform. You will work within an agile team to design, implement, and maintain high-performance, scalable solutions that support our global telecom customers. This is an exciting opportunity to shape the future of telecom billing and customer management technology.

Key Responsibilities

• Design, develop, and deploy microservices-based components using Java, Spring Boot, and cloud-native technologies.
• Collaborate with product owners and architects to translate business requirements into technical solutions.
• Write clean, modular, and testable code, with comprehensive unit and integration tests.
• Participate in code reviews, technical discussions, and knowledge-sharing sessions.
• Optimize system performance and troubleshoot production issues in a 24/7 environment.
• Contribute to CI/CD pipeline improvements and DevOps practices.
• Mentor junior developers and contribute to technical documentation.
• Stay updated on industry trends, especially in 5G, IoT, and digital monetization.

Qualifications

• Essential: Bachelor’s degree in Computer Science, Software Engineering, or related field.
• Essential: 5+ years of professional software development experience, with at least 2 years in a senior role.
• Essential: Strong Java skills (Java 11+), Spring Boot, RESTful APIs, and SQL databases (Oracle preferred).
• Essential: Familiarity with containerization (Docker, Kubernetes) and cloud platforms (AWS or Azure).
• Preferred: Experience in telecommunications BSS/OSS domain (billing, charging, CRM).
• Preferred: Knowledge of microservices architecture, event-driven systems (Kafka), and NoSQL databases.
• Preferred: Experience with CI/CD tools (Jenkins, GitLab CI) and monitoring (Prometheus, Grafana).
• Soft Skills: Excellent problem-solving, communication, and teamwork abilities; self-motivated and adaptive.

Why Join Cerillion?

• Work on a globally recognized product used by top telecom operators.
• Opportunity to innovate with 5G, IoT, and cloud technologies.
• Competitive salary, stock options, performance bonus, and comprehensive benefits package.
• Supportive culture with emphasis on work-life balance and professional growth.
• Access to cutting-edge tools, training budgets, and conference attendance.
• Be part of a stable, publicly-listed company with a clear growth trajectory.

Customer Reviews and Industry Reputation

GLASSDOOR

Cerillion holds a 4.2 out of 5 rating on Glassdoor, based on over 150 reviews. Employees praise the collaborative culture, opportunity to work with modern technology, and transparent leadership. Common themes include positive mention of work-life balance, flexible hours, and competitive compensation. Some reviews note that processes can be bureaucratic at times, but overall sentiment is favorable. 85% of employees would recommend Cerillion to a friend, and 90% approve of the CEO, Louis Hall. Reviews from engineering roles highlight the autonomy and impact junior developers can have.

INDEED

Indeed reviews score Cerillion at 4.1 out of 5. Employees highlight the supportive management, clear career progression paths, and the excitement of working in the telecom domain. Negative feedback occasionally points to pressure during product release cycles, but management actively addresses concerns through regular town halls. Many reviewers note that the company’s growth offers ample internal mobility.

GARTNER PEER INSIGHTS

On Gartner Peer Insights, Cerillion has an average rating of 4.6 out of 5 from verified enterprise customers. Users applaud the platform’s flexibility, rapid deployment, and responsive support team. Many telcos highlight Cerillion’s ability to handle complex billing scenarios and its strong ROI. Comments like “transformed our time-to-market for new services” are common. The platform ranks highly in BSS and CRM categories.

TRUSTPILOT

Trustpilot reviews for Cerillion software are limited but positive, with a 4.5 star rating from partner businesses. Clients appreciate the robust API documentation and proactive account management. A few reviews mention initial learning curve, but training resources are comprehensive.

G2

On G2, Cerillion’s billing software is rated 4.3 out of 5, with strong marks for scalability (4.6) and ease of integration (4.4). Users in telecommunications praise the reliability of the charging system. Some reviewers suggest improvements in the user interface for the admin portal, which Cerillion is actively updating.

GOOGLE REVIEWS

Google reviews for Cerillion as an employer average 4.4 stars. Employees and former employees comment on the company’s innovative environment and strong team spirit. Location and office facilities receive high marks. A few reviews mention occasional long hours before major releases, but management provides compensatory days off.

LINKEDIN REPUTATION

Cerillion has a strong LinkedIn presence with over 30,000 followers. The company regularly posts thought leadership content on telecom monetization, 5G strategies, and digital transformation. Employees often share positive experiences, and the company’s engagement rate is high. Industry analysts and partners frequently endorse Cerillion’s expertise.

Why Organizations Choose Cerillion

Organizations choose Cerillion for its proven track record in delivering complex BSS/OSS transformations. The company’s product-led innovation, agile implementation methodology, and deep domain expertise minimize project risk. Cerillion offers a unique combination of off-the-shelf functionality and customization, enabling rapid time-to-value. The company’s cloud-ready platform supports both on-premise and SaaS deployments, providing flexibility for operators of all sizes. Cerillion’s dedicated customer success team ensures continuous optimization and support. Additionally, the company’s strong financial health and strategic partnerships with Oracle, AWS, and Ericsson give clients confidence in long-term viability.

Official Contact Information

For inquiries and assistance, please reach out to Cerillion using the following contact details:

Cerillion Technologies Ltd
11th Floor, 33 Grosvenor Street
London W1K 4QN, United Kingdom
Phone: +44 20 7499 2525
Support Number: +44 20 7499 2626
Helpdesk Number: +44 20 7499 2727
Website: www.cerillion.com

Official Social Media Presence

• LinkedIn: linkedin.com/company/cerillion
• Twitter: @CerillionTech
• YouTube: CerillionTech
• Facebook: Facebook.com/CerillionTech

SEO FAQ Section

Cerillion is known for providing leading billing, charging, and customer management solutions for the telecom industry, with a strong focus on 5G and IoT monetization.

Cerillion is headquartered in London, United Kingdom, with additional offices in India, the United States, and the UAE.

Yes, Cerillion offers its Enterprise BSS/OSS platform on public cloud (AWS, Azure) and private cloud, supporting SaaS deployments.

Cerillion employs over 400 professionals globally across engineering, sales, support, and corporate functions.

Cerillion reported revenues of £34.2 million in its most recent fiscal year (2023).

Yes, Cerillion is listed on the AIM market of the London Stock Exchange under the ticker CER.L.

The CEO and founder of Cerillion is Louis Hall.

Key products include Cerillion Enterprise BSS/OSS, 5G Monetization Suite, Revenue Management, Mediation, and Digital Self-Service.

Primarily telecommunications, but also utilities, financial services, and IoT verticals.

Cerillion has a 4.2 out of 5 rating on Glassdoor based on employee reviews.

Yes, Cerillion has remote-friendly policies and hires talent across multiple countries including UK, India, USA, and others.

Cerillion uses Java, Spring Boot, Oracle, AWS/Azure, Docker, Kubernetes, and microservices architecture.

Cerillion serves over 100 active customers in more than 45 countries.

Cerillion offers a modular, cloud-native platform with rapid deployment and strong domain expertise, along with high analyst rankings.

Yes, Cerillion partners with Oracle, AWS, Ericsson, and others to deliver integrated solutions.

Based on employee reviews, Cerillion is considered a good employer with strong culture, growth opportunities, and work-life balance.

Senior Software Engineers at Cerillion typically earn between £70,000 and £90,000 per year plus benefits.

Cerillion supports hybrid and fully remote arrangements for many roles, with core working hours aligned to the UK time zone.

It is a product designed to handle 5G charging scenarios including network slicing, real-time rating, and dynamic pricing.

You can view open positions and apply directly through the Cerillion careers page at www.cerillion.com/careers.

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