Senior Snowflake Developer

Proactive Appointments; City Of London; On-site; GBP 70,000 - 110,000; Full time

Job summary

Proactive Appointments is recruiting a Senior Snowflake Developer to join a major data platform modernisation programme for a banking client. You will migrate legacy SQL Server workloads to Snowflake, build cloud-based data solutions and optimise pipelines.

The role requires hands-on Snowflake, dbt and Python expertise, with strong SQL Server experience and a solid data warehousing background within a regulated financial services environment.

Qualifications

• Three+ years’ hands-on Snowflake development experience.
• dbt data modelling, transformation, testing and deployment.
• Advanced Python development for data engineering and automation.
• SQL Server experience including design, tuning and troubleshooting.
• Enterprise-scale ETL/ELT solutions delivery experience.
• Data warehousing principles, star schema and dimensional modelling knowledge.
• Data governance, quality and reconciliation understanding.
• Git-based source control and CI/CD familiarity.
• Banking or Financial Services data solutions experience.
• Strong stakeholder engagement.

Responsibilities

• Develop, enhance and optimise Snowflake data solutions during migration.
• Build and maintain data pipelines and models with dbt.
• Develop Python scripts to support data migration and automation.
• Migrate SQL Server databases, queries and procedures to Snowflake.
• Design and maintain scalable ETL/ELT pipelines with data quality controls.
• Develop Snowflake structures and dimensional models for reporting.
• Apply Snowflake performance tuning and cost optimisation.
• Implement automated testing, source control and CI/CD for deployments.
• Ensure compliance with enterprise data architecture and governance.
• Engage stakeholders to translate requirements into technical solutions.
• Troubleshoot data issues and support migration milestones.
• Contribute to technical design decisions and mentor junior developers.

Skills

Snowflake

dbt

Python

SQL Server

ETL/ELT

Data Warehousing

Data Governance

Git/CI-CD

Banking/Financial Services

Stakeholder Engagement

Tools

Git

CI/CD pipelines

Job description

Senior Snowflake Developer

Inside IR35 - 4 days onsite

We are currently recruiting for an experiencedSnowflake Developer to join our banking client on a major data platform modernisation programme.

The successful candidate will play a key role in migrating legacy Microsoft SQL Server workloads to Snowflake, developing and optimising cloud-based data solutions to support critical banking functions.

This is a hands-on development role requiring strong expertise in Snowflake, dbt, Python and SQL Server, alongside a solid understanding of data warehousing, ETL/ELT processes and enterprise data architecture.

You will work closely with business stakeholders, data engineers, architects and wider technology teams to deliver robust, scalable and high-quality data solutions within a regulated financial services environment. Experience in Credit Risk, Market Risk or other banking data domains would be highly advantageous.

Key Responsibilities

• Develop, enhance and optimise Snowflake data solutions as part of a legacy SQL Server migration programme.

• Build and maintain data transformation pipelines and models using dbt.

• Develop Python scripts and automation solutions to support data migration, processing and operational efficiency.

• Analyse and migrate existing SQL Server databases, queries, stored procedures and data transformation logic to Snowflake.

• Design, implement and maintain scalable ETL/ELT pipelines, ensuring data quality, integrity and reconciliation throughout the migration.

• Develop and optimise data warehouse structures, star schemas and dimensional models to support business and regulatory reporting.

• Apply best practices for Snowflake performance tuning, query optimisation and cost efficiency.

• Implement automated testing, source control and CI/CD processes to support controlled and reliable deployments.

• Ensure data solutions adhere to enterprise data architecture, governance and control standards.

• Engage with business stakeholders and product owners to gather requirements and translate them into effective technical solutions.

• Troubleshoot complex data issues and support the successful delivery of migration milestones.

• Contribute to technical design decisions, lead development activities and mentor junior developers where required.

Essential Skills & Experience

• Extensive hands-on experience developing solutions in Snowflake, ideally with at least three years of dedicated experience.

• Strong experience with dbt, including data modelling, transformation, testing and deployment.

• Advanced Python development skills for data engineering and automation.

• Strong SQL Server experience, including database design, query optimisation, performance tuning and troubleshooting.

• Significant experience designing and delivering enterprise-scale ETL/ELT solutions.

• Strong understanding of data warehousing principles, star schema design, dimensional modelling and data architecture.

• Experience with data governance, data quality and reconciliation within enterprise environments.

• Familiarity with Git-based source control, CI/CD pipelines and structured development and release practices.

• Proven experience delivering data solutions within Banking or Financial Services.

• Strong stakeholder en