Senior Developer
Company
Location
London, England, United Kingdom
Posted At
8/20/2025
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Description
Introduction
Discover a world of endless possibilities at Gallagher Benefit Services, where you'll have the power to shape the future of workplaces across industries. As a member of our team, you become the driving force behind positive change, helping clients build environments where employees thrive. Embrace the opportunity to impact lives, unlock potential, and create a legacy of remarkable transformation.
We believe that every candidate brings something special to the table, including you! So, even if you feel that you’re close but not an exact match, we encourage you to apply.
Overview
We are looking for a Senior Developer to join our exciting team. Our agile development team builds internal and client-facing applications, including research, data, analytics, and interactive investment tools. These solutions are delivered through web interfaces and function libraries, making a big impact on the business. We value continuous improvement and learning, offering dedicated learning and development (L&D) days each sprint and access to a learning platform. Our focus is on efficiency, collaboration, and delivering results.
How You'll Make An Impact
On top of a competitive salary, great teams and exciting career opportunities, we also offer a wide range of benefits.
Below are the minimum core benefits you’ll get, depending on your job level these benefits may improve:
Inclusion and diversity (I&D) is a core part of our business, and it’s embedded into the fabric of our organisation. For more than 95 years, Gallagher has led with a commitment to sustainability and to support the communities where we live and work.
Gallagher embraces our employees’ diverse identities, experiences and talents, allowing us to better serve our clients and communities. We see inclusion as a conscious commitment and diversity as a vital strength. By embracing diversity in all its forms, we live out The Gallagher Way to its fullest.
Gallagher is Disability Confident Committed. We have pledged to make sure our recruitment process is inclusive and accessible, in addition to supporting our existing employees with any long-term health conditions or disabilities.
We understand that applicants may have disabilities, if you do, you may find some parts of the recruitment process more challenging than others. Don’t worry, we’re here to help, however, we can only do this if you let us know.
Should you require reasonable adjustments to your application, please get in touch with [email protected] . If you’d prefer to speak on the phone, please request a call back, leaving details, so we get in touch.
Our employing entity, Arthur J. Gallagher Services (UK) Limited, is proud to be accredited as a Living Wage employer with the Living Wage Foundation. We are committed to diversity and opportunity for all and are opposed to any form of less favourable treatment on the grounds of gender or gender identity, marital status, civil partnership status, parental status, race, ethnicity, colour, nationality, disability, sexual orientation, religion/ belief, age and those with caring responsibilities.
Gallagher believes that all persons are entitled to equal employment opportunity and prohibits any form of discrimination by its managers, employees, vendors or customers based on race, color, religion, creed, gender (including pregnancy status), sexual orientation, gender identity (which includes transgender and other gender non-conforming individuals), gender expression, hair expression, marital status, parental status, age, national origin, ancestry, disability, medical condition, genetic information, veteran or military status, citizenship status, or any other characteristic protected (herein referred to as “protected characteristics”) by applicable federal, state, or local laws.
Equal employment opportunity will be extended in all aspects of the employer-employee relationship, including, but not limited to, recruitment, hiring, training, promotion, transfer, demotion, compensation, benefits, layoff, and termination. In addition, Gallagher will make reasonable accommodations to known physical or mental limitations of an otherwise qualified person with a disability, unless the accommodation would impose an undue hardship on the operation of our business.
Discover a world of endless possibilities at Gallagher Benefit Services, where you'll have the power to shape the future of workplaces across industries. As a member of our team, you become the driving force behind positive change, helping clients build environments where employees thrive. Embrace the opportunity to impact lives, unlock potential, and create a legacy of remarkable transformation.
We believe that every candidate brings something special to the table, including you! So, even if you feel that you’re close but not an exact match, we encourage you to apply.
Overview
We are looking for a Senior Developer to join our exciting team. Our agile development team builds internal and client-facing applications, including research, data, analytics, and interactive investment tools. These solutions are delivered through web interfaces and function libraries, making a big impact on the business. We value continuous improvement and learning, offering dedicated learning and development (L&D) days each sprint and access to a learning platform. Our focus is on efficiency, collaboration, and delivering results.
How You'll Make An Impact
- As a Senior Developer, you will lead an Agile Scrum team of developers while actively contributing to development tasks. Your responsibilities will include:
- Actively participating in delivering development stories during sprints and driving technical approaches.
- Facilitating agile practices and ceremonies, such as daily standups, sprint planning, and refinement sessions.
- Tracking team performance using Agile metrics and identifying areas for improvement.
- Acting as a bridge between the development team and stakeholders to ensure clear communication and collaboration.
- Guiding and supporting team members to foster a culture of continuous learning and improvement.
- Collaborating with the Product Owner to manage the product backlog, ensuring user stories are well-defined and prioritized.
- Promoting best practices in coding, testing, and deployment to ensure high-quality software delivery.
- Encouraging innovation by experimenting with new tools, techniques, and processes to improve efficiency.
- Experience leading a development team using Agile Scrum practices.
- Proficiency in C# .NET, TypeScript/JavaScript, and associated web technologies.
- Knowledge of React (preferred) or Angular.
- Familiarity with cloud technologies such as Azure or AWS.
- Strong experience with relational databases (RDBMS) and SQL (preferably PostgreSQL or SQL Server).
- Practical experience with microservice architecture.
- Professional attitude, including being a self-starter, working independently or in a team, and meeting deadlines.
- Strong communication skills.
- Bonus skills: Event Sourcing, CQRS, serverless development (AWS Lambda), NoSQL databases (MongoDB), and platform tools like Octopus Deploy, TeamCity, Kubernetes, or Docker.
- Eligible to work in the UK.
On top of a competitive salary, great teams and exciting career opportunities, we also offer a wide range of benefits.
Below are the minimum core benefits you’ll get, depending on your job level these benefits may improve:
- Minimum of 25 days holiday, plus bank holidays, and the option to ‘buy’ extra days
- Defined contribution pension scheme, which Gallagher will also contribute to
- Life insurance, which will pay 4x your basic annual salary, which you can top-up to 10x
- Income protection, we’ll cover up to 50% of your annual income, with options to top up
- Health cash plan or Private medical insurance
- Three fully paid volunteering days per year
- Employee Stock Purchase plan, offering company shares at a discount
- Share incentive plan, HMRC approved, tax effective, stock purchase plan
- Critical illness cover
- Discounted gym membership, with over 3,000 gyms nationally
- Season ticket loan
- Access to a discounted voucher portal to save money on your weekly shop or next big purchase
- Emergency back-up family care
- And many more…
Inclusion and diversity (I&D) is a core part of our business, and it’s embedded into the fabric of our organisation. For more than 95 years, Gallagher has led with a commitment to sustainability and to support the communities where we live and work.
Gallagher embraces our employees’ diverse identities, experiences and talents, allowing us to better serve our clients and communities. We see inclusion as a conscious commitment and diversity as a vital strength. By embracing diversity in all its forms, we live out The Gallagher Way to its fullest.
Gallagher is Disability Confident Committed. We have pledged to make sure our recruitment process is inclusive and accessible, in addition to supporting our existing employees with any long-term health conditions or disabilities.
We understand that applicants may have disabilities, if you do, you may find some parts of the recruitment process more challenging than others. Don’t worry, we’re here to help, however, we can only do this if you let us know.
Should you require reasonable adjustments to your application, please get in touch with [email protected] . If you’d prefer to speak on the phone, please request a call back, leaving details, so we get in touch.
Our employing entity, Arthur J. Gallagher Services (UK) Limited, is proud to be accredited as a Living Wage employer with the Living Wage Foundation. We are committed to diversity and opportunity for all and are opposed to any form of less favourable treatment on the grounds of gender or gender identity, marital status, civil partnership status, parental status, race, ethnicity, colour, nationality, disability, sexual orientation, religion/ belief, age and those with caring responsibilities.
Gallagher believes that all persons are entitled to equal employment opportunity and prohibits any form of discrimination by its managers, employees, vendors or customers based on race, color, religion, creed, gender (including pregnancy status), sexual orientation, gender identity (which includes transgender and other gender non-conforming individuals), gender expression, hair expression, marital status, parental status, age, national origin, ancestry, disability, medical condition, genetic information, veteran or military status, citizenship status, or any other characteristic protected (herein referred to as “protected characteristics”) by applicable federal, state, or local laws.
Equal employment opportunity will be extended in all aspects of the employer-employee relationship, including, but not limited to, recruitment, hiring, training, promotion, transfer, demotion, compensation, benefits, layoff, and termination. In addition, Gallagher will make reasonable accommodations to known physical or mental limitations of an otherwise qualified person with a disability, unless the accommodation would impose an undue hardship on the operation of our business.
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