Senior Data Platform Engineer

EPAM Systems; Greater London; Hybrid; GBP 90,000 - 140,000; Full time

Benefits offered by this job

ESPP

Life assurance

Income protection

Critical illness cover

Private medical insurance

Dental care

Employee Assistance Program

Cyclescheme

Techscheme

Season ticket loans

Free Wednesday lunch in-office

On-site massages

Regular social events

Learning and development opportunities

Job summary

EPAM Systems in London is seeking a Senior Data Platform Engineer to design, build, and optimize large-scale data platforms integrating legacy systems with modern AWS-based architectures.

The role emphasizes performance tuning, API development, and platform modernization, with a focus on SQL Server, enterprise data estates, and AI-assisted tooling to accelerate delivery while ensuring reliability.

Qualifications

• Strong SQL Server capabilities with performance-tuning experience.
• Experience with large relational data estates and enterprise systems.
• Proficiency in C# backend development and API design.
• Familiarity with AWS and data-architecture patterns.

Responsibilities

• Develop and optimize SQL Server queries, stored procedures, and data-processing workflows.
• Design and implement backend services and robust APIs for enterprise systems and integrations.
• Support legacy platforms while driving modernization initiatives.
• Improve query performance, indexing, and overall processing efficiency.
• Build and maintain services within AWS to enable scalable architectures.
• Implement automation, monitoring, and reliability improvements.
• Contribute to engineering standards and platform-wide improvements.
• Collaborate with architects, engineers, and product teams on critical solutions.
• Leverage AI-assisted development tools within modern workflows.

Skills

SQL Server

Relational data estate

C# backend development

API design

ETL processes

AI-assisted development tools

Performance tuning

Education

Degree in Computer Science or Engineering

Tools

AWS

SQL Server Management Studio

CI/CD pipelines

Job description

We're looking for a Senior Data Platform Engineer to join our team in London, United Kingdom in a hybrid working mode.

This role focuses on designing, building and optimizing large-scale data platforms that combine legacy enterprise systems with modern AWS-based architectures. You will work on performance tuning, API development, and platform modernization, while ensuring stability of critical services. The position requires strong SQL Server expertise and the ability to operate confidently across complex systems. It also offers an opportunity to leverage AI-assisted development tools to accelerate delivery and improve engineering workflows.

Responsibilities

• Develop and optimize SQL Server queries, stored procedures, and data-processing workflows
• Design and implement backend services and robust APIs for enterprise systems and integrations
• Support existing legacy platforms while driving iterative modernization initiatives
• Improve query performance, indexing strategies, and overall processing efficiency
• Build and maintain services within AWS environments to enable scalable architectures
• Implement automation, monitoring, and operational enhancements to improve reliability
• Contribute to engineering standards, best practices, and platform-wide improvements
• Collaborate with architects, engineers, and product teams to deliver business-critical solutions
• Leverage AI-assisted development tools as part of modern engineering workflows

Requirements

• Strong SQL Server capability including advanced queries, indexing, and performance tuning
• Experience with large relational data estates and high-volume structured data
• Backend development proficiency in C# or readiness to quickly transition to C#
• Knowledge of designing and building APIs for distributed systems
• Familiarity with AWS cloud services and deployment practices
• Competence in working within complex enterprise or legacy technology environments
• Understanding of ETL processes and data-processing pipeline design
• Ability to apply AI-assisted development tools effectively
• Strong analytical and problem-solving skills with attention to performance and scalability

Nice to have

• Experience within financial data or market-data environments
• Degree in Computer Science, Engineering, or equivalent practical experience

We offer

• EPAM Employee Stock Purchase Plan (ESPP)
• Protection benefits including life assurance, income protection and critical illness cover
• Private medical insurance and dental care
• Employee Assistance Program
• Cyclescheme, Techscheme and season ticket loans
• Various perks such as free Wednesday lunch in-office, on-site massages and regular social events
• Learning and development opportunities including in-house training and coaching, professional certifications, and courses
• If otherwise eligible, participation in the discretionary annual bonus program
• If otherwise eligible and hired into a qualifying level, participation in the discretionary Long-Term Incentive (LTI) Program