Snowflake Senior Developer

Location: London (Hybrid)
Employment Type: Full-time
Seniority: Senior Individual Contributor
Reports to: Data Engineering Lead / Manager

Summary of role

We are seeking a Snowflake Senior Developer to design, develop, and optimise data solutions on our cloud data platform. You will work closely with data engineers, analysts, and architects to deliver high-quality, scalable data pipelines and models. Strong expertise in Snowflake, ETL/ELT, data modelling, and data warehousing is essential.

Responsibilities

Snowflake Development: Build and optimise Snowflake objects (databases, schemas, tables, views, tasks, streams, resource monitors).
ETL/ELT Pipelines: Develop and maintain robust data pipelines using tools like dbt, Airflow, Azure Data Factory, or similar.
Data Modelling: Implement dimensional models (star/snowflake schemas), handle SCDs, and design efficient structures for analytics.
Performance Tuning: Optimise queries, manage clustering, caching, and warehouse sizing for cost and speed.
Data Quality: Implement testing frameworks (dbt tests, Great Expectations) and ensure data accuracy and freshness.
Security & Governance: Apply RBAC, masking policies, and comply with data governance standards.
Collaboration: Work with BI teams to ensure semantic alignment and support self-service analytics.
Documentation: Maintain clear technical documentation for pipelines, models, and processes.

Qualifications

Matric and a Degree in IT
Strong SQL skills (complex queries, performance tuning) and proficiency in Python for data processing.
Experience with ETL/ELT tools (dbt, Airflow, ADF, Informatica, Matillion).
Solid understanding of data warehousing concepts (Kimball, Data Vault, normalization).
Familiarity with cloud platforms (Azure preferred; AWS/GCP acceptable).
Knowledge of data governance, security, and compliance (GDPR).
Excellent problem-solving and communication skills.

Skills

Experience with Snowpark, UDFs, dynamic tables, and external tables.
Exposure to streaming/CDC (Kafka, Fivetran, Debezium).
BI tool integration (Power BI, Tableau, Looker).
Certifications: SnowPro Core or Advanced.