Senior Data Engineer

Reward; Belfast City District; Hybrid; GBP 65,000 - 90,000; Full time

Benefits offered by this job

Hybrid working model (3 days in office

Pension matched up to 6%

Generous family-friendly cover

Income protection

Life insurance

Job summary

Reward is seeking a Senior Data Engineer to design, build, and optimize large-scale data solutions. You will work with Data Scientists, Software Engineers and Solution Architects to deliver robust data pipelines and reporting capabilities that empower data-driven decisions across the business.

In this role you will lead ETL pipelines in AWS, design scalable data architectures for terabyte-scale systems, implement IaC with Terraform, and ensure data governance, security and quality across

Qualifications

• 5+ years hands-on experience with terabyte-scale databases and high-volume data systems
• ETL design and orchestration experience
• Performance optimization and scalability expertise
• Data governance, security and compliance knowledge
• Expertise in Microsoft SQL Server stack and BI tools
• Proficiency with AWS cloud services and IaC tooling
• Degree in a quantitative field such as CS/Engineering/Math

Responsibilities

• Lead design and implementation of ETL pipelines and data lakes in AWS for scalable data access
• Collaborate with Data Scientists, Software Engineers and Architects to integrate data solutions
• Develop and optimize architectures for terabyte-scale relational and distributed systems
• Implement IaC using Terraform for automated deployments
• Ensure data governance, security, and compliance across environments
• Translate business requirements into technical specs and actionable solutions
• Drive performance tuning, indexing, and query optimization for large datasets
• Automate workflows and enforce data quality and lineage tracking
• Provide QA and peer review support and produce clear documentation

Skills

Terabyte-scale databases

ETL design

Performance optimization

Data governance and security

Translate non-technical requirements

Excel advanced

Education

Degree in a quantitative field

Tools

Microsoft SQL Server (SSRS/SSIS/SSAS)

AWS (EC2, S3, RDS, Glue)

Terraform

Power BI

Tableau

Python

Job description

Reward, part of the Rezolve Ai Group, is transforming the way people, banks, brands and retailers connect through everyday commerce.

Operating across 15+ markets throughout the UK, Europe, the Middle East and Asia, Reward sits at the intersection of banking and commerce, connecting financial institutions and retailers through technology, transaction intelligence and digital engagement.

Our platform helps banks deliver more relevant and rewarding experiences to millions of customers, while enabling brands and retailers to reach valuable audiences, drive measurable sales and build lasting loyalty.

Since our beginnings, we’ve had a simple mission: to make everyday spending more rewarding. To date, we’ve returned billions in cashback to consumers and continue to innovate how people engage with brands through their everyday spending.

In 2026, Reward became part of Rezolve Ai, a global AI-powered commerce and payments technology company. Together, we’re combining Reward’s transaction intelligence, customer engagement capabilities and commerce network with Rezolve Ai’s technology to create smarter, more personalised journeys from discovery and engagement through to transaction and loyalty.

This is an exciting time to join Reward. We’re an established, growing business with the technology, partnerships and expertise to make a real impact, combined with the ambition and opportunity that comes from being part of a global AI commerce organisation.

Our people are at the heart of that journey. We’re proud to be Great Place to Work® certified and recognised among the UK’s Best Workplaces™ Top 50 for 2026, reflecting a culture built around trust, inclusion, collaboration and putting people first.

We’re shaping the next generation of commerce and customer engagement - and we’re looking for people who want to help us build it.

Role Summary

We are looking for an experienced Senior Data Engineer to design, build, and optimize large-scale data solutions. You will work closely with Data Scientists, Software Engineers, and Solution Architects, as well as business stakeholders, to deliver robust, scalable data pipelines and reporting solutions. This role is pivotal in shaping the future of our data products and ensuring data-driven decision-making across the organization.

Job Requirements

• Minimum 5 years hands-on experience working with terabyte-scale databases and high-volume data systems
• Strong understanding of data engineering principles, including:
• ETL design and orchestration
• Performance optimization and scalability
• Data quality, governance, and security
• Expertise in Microsoft SQL Server (SSRS, SSIS, SSAS)
• Proficiency in AWS Cloud services (EC2, S3, RDS, Glue)
• Experience with Terraform for IaC and automation
• Ability to translate non-technical requirements into technical solutions
• Advanced MS Excel (complex formulas, PowerPivot, VBA)
• Python experience for data wrangling and automation
• Worked with various cloud technologies
• Experience with BI tools (Power BI, Tableau)
• Familiarity with AWS governance frameworks and compliance standards
• Domain expertise in retail, banking, CRM, loyalty programs, or digital marketing
• Degree in a quantitative field (Computer Science, Engineering, Mathematics, etc.)

Job Responsibilities

• Lead the design and implementation of ETL pipelines and data lakes in AWS for scalable and efficient data access
• Collaborate with Data Scientists, Software Engineers, and Architects to integrate data solutions into analytics and applications
• Develop and optimize data architectures for terabyte-scale relational and distributed systems
• Implement Infrastructure as Code (IaC) using Terraform for automated deployments
• Ensure data governance, security, and compliance across all environments
• Translate business requirements into technical specifications and actionable solutions
• Drive performance tuning, indexing strategies, and query optimization for high-volume datasets
• Automate workflows and enforce best practices for data quality and lineage tracking
• Provide QA and peer review support for team deliverables
• Produce clear, structured documentation for processes and solutions

About You

• You thrive in a collaborative environment—working with data scientists, engineers, and architects to deliver innovative solutions
• You live and breathe clean, efficient SQL
• You have great attention to detail and high standards for code quality
• You have strong analytical and organizational skills
• You approach problems with a proactive and positive attitude
• You keep an active interest in emerging technologies
• You’re a people person and enjoy team interactions and socials

Why Reward

This is an exciting time to join Reward as we continue to grow as part of the Rezolve Ai Group. You'll have the opportunity to work in a fast moving, technology led environment, collaborate with talented people across our international business and make a tangible impact in your role.

You'll have the opportunity to learn, grow and shape how we work, while being part of a culture that values collaboration, inclusion, curiosity and getting things done.

• Ability to buy and sell holiday days as well as the ability to bank days (tenure dependant)
• Flexible working options: we are operating a hybrid working model with 3 days a week from the office
• Pension: Hargreaves Lansdown up to 6% matched contribution
• Generous family friendly cover
• Income protection
• Critical illness cover
• Life insurance cover
• Optical cover
• Yulife app for access to employee wellbeing and discounts
• Perks at Work, cashback/discount shopping site
• Salary sacrifice program which includes cycle to work scheme, electric car scheme and season ticket loans
• Company events i.e. Christmas party, all-company event and other social/hosted events during the year (we have an active social committee!)
• Team socials

At Reward, we are committed to creating an inclusive and diverse workplace where everyone is valued, respected and given the opportunity to thrive.

We are an equal opportunities employer and welcome applications from candidates of all backgrounds, experiences and perspectives. Recruitment and employment decisions are based on skills, experience, capability and potential, and we do not discriminate on the basis of any protected characteristic.

We are committed to ensuring our recruitment process is fair, accessible and inclusive. We will consider reasonable adjustments for candidates who require additional support during the recruitment and selection process.

We believe that diversity of thought, background and experience strengthens our teams and helps us build a better Reward.