Senior Software Developer

Kantar Group Limited; London; Hybrid; GBP 60,000 - 90,000; Full time

Job summary

A leading company in data and insights is seeking a Senior Software Developer in London. The role involves developing production-grade software, utilizing Azure services, and mentoring a team. The ideal candidate will have extensive experience in Python and Java, and a strong focus on data security and cloud solutions.

Qualifications

• 5-7 years of experience in software development.
• Proficiency in Java, Python, and PySpark.

Responsibilities

• Lead the design and development of high-quality software solutions.
• Collaborate with third-party vendors for integration.

Skills

Python

Java

Team Leadership

Communication

Organizational Skills

Education

Bachelor's Degree in Engineering

Tools

Azure

PySpark

Airflow

Job description

Senior Software Developer page is loaded

Senior Software Developer

Apply locations London, Grays Inn Road time type Full time posted on Posted Yesterday time left to apply End Date: August 3, 2025 (30+ days left to apply) job requisition id R094690

Media help partners understand the changing advertising landscape. Specialising in audience measurement, consumer targeting and in-depth intelligence into paid, owned and earned media, their global coverage and local expertise enable better understanding of media audiences and their relationships with brands.

Kantar Media is a wholly owned but operationally independent part of the Kantar Group.

#LI-KantarMedia

Job Details

As people increasingly move across channels and platforms, Kantar Media’s data and audience measurement, targeting, analytics and advertising intelligence services unlock insights to inform powerful decision-making.

Working with panel and first-party data in over 80 countries, we have the world’s fastest growing cross-media measurement footprint, underpinned by versatility, scale, technology and expertise, to drive long-term business growth for our clients and partners.

Job Title: Senior Software Developer

Location: London, Grays Inn Road
Full time/Permanent/Hybrid

About the Project/Role

We are seeking a Senior Software Developer with a strong focus on developing production-grade software, extensive experience with Azure services, and proficiency in Python, PySpark. As a Senior Software Developer, you will work with a team of 3 engineers and collaborate with a third-party vendor to deliver robust, scalable solutions.

Job Role Requirements

• Development: Lead the design and development of high-quality, production-grade software solutions using Java, Python, and PySpark. Ensure code is optimized, scalable, and maintainable.

• Azure Expertise: Leverage Azure services extensively, particularly Azure Storage, for scalable cloud solutions. Ensure seamless integration with AWS S3 and implement secure data encryption/decryption practices.

• Python Implementation: Utilize Python, Pyspark for processing large datasets and integrating with cloud-based data solutions.

• Team Leadership: Code review and mentor a team of 3 engineers, fostering best practices in software development and code quality.

• Vendor Collaboration: Work closely with third-party vendors to integrate their solutions, ensuring they meet our high standards for production environments.

• Workflow Automation: Utilize Airflow to automate and optimize workflows, ensuring efficient and reliable operations.

Required

• 5-7 years of experience in software development with a focus on production-grade code.

• Proficiency in Java, Python, and PySpark; experience with C++ is a plus.

• Deep expertise in Azure services, including Azure Storage, and familiarity with AWS S3.

• Strong understanding of data security, including encryption/decryption.

• Proven technical skills with experience collaborating with different teams and with third-party vendors.
• Soft Skills: communication, and organizational skills. Ability to work independently as well as in a team environment.
• Education: A bachelor’s degree in engineering, particularly in Computer Science, Software Engineering, or a related field, is highly desirable.

At Kantar, the diversity of our employees provides a richer environment for our employees and broader depth and breadth of thinking for our clients. Kantar is committed to inclusion and diversity; therefore, we welcome applications from all sections of society and do not discriminate based on age, race, religion, gender, pregnancy, sexual orientation, gender identity, disability, marital status, or any other legally protected characteristics.

At Kantar we have an integrated way of rewarding our people based around a simple, clear, and consistent set of principles. Our approach helps to ensure we are market competitive and to support a pay for performance culture, where your reward and career progression opportunities are linked to what you deliver.

We want to create an equality of opportunity in a fair and supportive working environment where people feel included, accepted, and are allowed to flourish in a space where their mental health and wellbeing is taken into consideration. We want to create a more diverse community to expand our talent pool, be locally representative, drive diversity of thinking and better commercial outcomes.

Privacy and Legal Statement

PRIVACY DISCLOSURE: Please note that by applying to this opportunity you consent to the personal data you provide to us to be processed and retained by The Kantar Group Limited (“Kantar”). Your details will be kept on our Internal ATS (Applicant Tracking System) for as long as is necessary for the purposes of recruitment, which may include your details being shared with the hiring manager(s) and for consideration for potential future opportunities by Kantar and its affiliate Kantar group companies. For full details of our privacy policy please visit www.kantar.com

Country

United Kingdom

Why join Kantar?

We pride ourselves on understanding people, and what makes us think and act the way we do.

And because we know people, we like to make sure our own people are being looked after as well. Equality of opportunity for everyone is our highest priority and we support our colleagues to work in a way that supports their health and wellbeing. While we encourage teams to spend part of their working week in the office, we understand no one size fits all; our approach is flexible to ensure everybody feels included, accepted, and that we can win together. We’re dedicated to creating an inclusive culture and value the diversity of our people, clients, suppliers and communities, and we encourage applications from all backgrounds and sections of society. Even if you feel like you’re not an exact match, we’d love to receive your application and talk to you about this job or others at Kantar.

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About Us

KANTAR

Kantar is the world’s leading data, insights and consulting company. We understand more about how people think, feel, shop, share, vote and view than anyone else. Combining our expertise in human understanding with advanced technologies, Kantar’s 25000 people help the world’s leading organisations succeed and grow.

Privacy

For information about how Kantar processes your personal data in the job application process, please click here to read our candidate privacy notice.