SQL Developer

QUESS SELECTION & SERVICES PTE. LTD.; Singapore; On-site; SGD 70,000 - 90,000; Full time

Job summary

A leading staffing services provider in Singapore is seeking an experienced SQL Developer. The role involves designing and developing ETL/ELT pipelines and writing complex SQL queries. Key responsibilities include optimizing database performance and ensuring high-quality data solutions. The ideal candidate has strong SQL development experience, hands-on experience with ETL tools, and excellent problem-solving skills. This position offers an opportunity to work in a dynamic environment focused on data excellence.

Qualifications

• Strong SQL and database development experience.
• Hands-on experience with ETL/ELT tools and frameworks.
• Knowledge of database optimization techniques.
• Excellent problem-solving, analytical, and communication skills.
• Familiarity with data validation and monitoring techniques.

Responsibilities

• Design, develop, and maintain ETL/ELT processes.
• Write and optimize complex SQL queries and scripts.
• Monitor and optimize database performance.
• Perform end-to-end verification of ETL processes.
• Create comprehensive technical documentation.

Skills

Strong SQL development experience

Experience with ETL/ELT tools

Knowledge of data modeling

Problem-solving skills

Familiarity with troubleshooting techniques

Job description

Overview

Role Overview: We are seeking a skilled SQL Developer to design, develop, and write complex SQL queries. The role involves building efficient ETL/ELT pipelines, optimizing database performance, and ensuring high-quality, fault-tolerant data solutions.

Responsibilities

• ETL / Data Pipeline Development: Design, develop, and maintain ETL/ELT processes to extract, transform, and load data from multiple sources. Implement scalable and fault-tolerant data integration workflows. Automate data movement and transformation tasks where applicable. Ensure pipelines are well-documented and maintainable.

• Database Development & Performance Optimization: Write, optimize, and maintain complex SQL queries, stored procedures, and scripts. Monitor, tune, and optimize database performance, indexing, and query execution plans. Manage data versioning, schema changes, and migrations. Maintain database integrity, security, and backup processes.

• Verification & Validation: Perform end-to-end verification and validation of ETL processes and data pipelines.

• Documentation & Knowledge Transfer: Create comprehensive technical documentation including architecture, deployment, and operational guides. Develop user manuals and administrative procedures for internal teams.

Qualifications & Skills

• Strong SQL and database development experience.

• Hands-on experience with ETL/ELT tools and data pipeline frameworks.

• Knowledge of data modeling, schema design, and database optimization techniques.

• Excellent problem-solving, analytical, and communication skills.

• Familiarity with data validation, monitoring, and troubleshooting techniques.

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This is in partnership with the Employment and Employability Institute Pte Ltd (“e2i”).

e2i is the empowering network for workers and employers seeking employment and employability solutions. e2i serves as a bridge between workers and employers, connecting with workers to offer job security through job-matching, career guidance and skills upgrading services, and partnering employers to address their manpower needs through recruitment, training, and job redesign solutions. e2i is a tripartite initiative of the National Trades Union Congress set up to support nation-wide manpower and skills upgrading initiatives. By applying for this role, you consent to Quesscorp Singapore’s PDPA and e2i’s PDPA