SENIOR DATA ENGINEER (Snowflake | Power BI | PostgreSQL) 5357
100% Remote

U.S. Citizens & W2 Only

6+ Month Contract w/ 6 month renewable increments

Tier4 Group is seeking a Senior Data Engineer to help modernize and scale a cloud-based enterprise data platform. This role is ideal for an experienced engineer who enjoys building high-performance data pipelines, developing analytics solutions, and driving cloud data warehouse initiatives.

You will play a key role in designing and implementing enterprise data solutions using Snowflake, Power BI, PostgreSQL, and advanced SQL while partnering with business and technical stakeholders across multiple functional areas.

Data Engineering & Cloud Data Platforms

• Design, develop, and support scalable ETL/ELT pipelines
• Build and optimize Snowflake data warehouse solutions
• Develop data ingestion processes using Snowpipe, stages, and automated workflows
• Create dimensional data models and transformation frameworks
• Implement data quality, monitoring, and governance controls
• Support migration of legacy systems into modern cloud-based architectures

Analytics & Reporting

• Design and develop Power BI semantic models and datasets
• Create executive dashboards and self-service reporting solutions
• Optimize DAX calculations, data models, and report performance
• Implement Row-Level Security (RLS) and deployment pipelines
• Modernize legacy reporting platforms into Power BI

Database Development & Performance Tuning

• Write and optimize complex SQL across Snowflake, PostgreSQL, and Oracle environments
• Develop PostgreSQL database objects including functions, triggers, and materialized views
• Perform query tuning, indexing, and performance optimization
• Design enterprise data warehouse schemas and metadata structures

Collaboration & Integration

• Integrate data across multiple enterprise business systems
• Support API and platform integrations
• Partner with architects, analysts, and business stakeholders to deliver data solutions
• Participate in Agile development processes and technical planning

Required Qualifications

Technical Skills

• Expert-level SQL development and optimization
• Strong PostgreSQL and PL/pgSQL experience
• Snowflake architecture, development, and performance tuning
• Power BI development, data modeling, and DAX
• ETL/ELT pipeline development
• Data warehouse design and dimensional modeling
• Git/GitLab version control

Experience

• 5+ years Data Engineering experience
• 3+ years Snowflake experience in production environments
• 3+ years Power BI development experience
• 3+ years ETL/ELT development experience
• 3+ years Data Warehouse design experience
• 2+ years PostgreSQL experience

Preferred Skills

• Oracle SQL / PL/SQL
• dbt
• Data Vault modeling
• REST API integrations
• SnowPro Certification
• Microsoft PL-300 or DP-203 Certification
• Experience supporting federal, aerospace, defense, or highly regulated environments

Ideal Candidate

You are a hands-on Senior Data Engineer who can:

• Build enterprise-grade data pipelines from scratch
• Design scalable cloud data architectures
• Troubleshoot and optimize complex data environments
• Translate business requirements into technical solutions
• Work independently in a fully remote environment
• Drive modernization and continuous improvement initiatives

Highlights

• 100% Remote
• S. Citizens Only
• Enterprise-Scale Data Platform Initiative
• Snowflake-Centric Environment
• High-Impact Analytics & Modernization Projects
• Long-Term Contract Potential

Digital Accessibility Specialist – Remote 5358

100% Remote

Long-Term Contract (12-Month Extensions)

W2 ONLY

$45- $53/hr W2

 

Tier4 Group is seeking an experienced Digital Accessibility Specialist to join a dynamic Digital Services team focused on creating accessible, inclusive, and user-friendly digital experiences. This role serves as the organization’s subject matter expert for digital accessibility, partnering with stakeholders across business and technology teams to ensure websites, applications, and digital content meet accessibility standards and deliver an exceptional user experience for all users.

This is an exciting opportunity for a professional who is passionate about accessibility, compliance, usability, and continuous improvement.

Key Responsibilities

Digital Accessibility Leadership

• Serve as the organization’s accessibility subject matter expert and trusted advisor.
• Research and stay current on accessibility standards, regulations, industry trends, and emerging technologies.
• Promote accessibility best practices across the organization and foster a culture of inclusive design.
• Develop accessibility resources, documentation, training materials, and knowledge-sharing initiatives.
• Partner with business and technical teams to embed accessibility into digital products and services.

Accessibility Audits & Compliance

• Lead accessibility evaluations of websites, applications, and digital content to ensure compliance with WCAG 2.1 A & AA standards.
• Conduct manual and automated accessibility testing and provide actionable remediation guidance.
• Document audit findings, prepare concise reports, and collaborate with stakeholders to resolve accessibility issues.
• Maintain audit methodologies, testing plans, and reporting processes.
• Track ongoing accessibility initiatives and compliance activities.

Standards, Governance & Best Practices

• Support the development and enforcement of accessibility standards, policies, and governance processes.
• Establish checkpoints and quality controls throughout the digital content and development lifecycle.
• Partner with project teams to ensure accessibility requirements are incorporated into planning, design, development, testing, and maintenance efforts.
• Identify opportunities for process improvement and recommend solutions that advance accessibility maturity.

Required Qualifications

Accessibility Expertise

• Strong experience applying digital accessibility, usability, and user experience (UX) principles to web content, applications, and digital communications.
• Deep understanding of WCAG 2.1 A & AA standards and accessibility compliance requirements.
• Knowledge of accessibility-related regulations and standards, including:
• Americans with Disabilities Act (ADA)
• Web Content Accessibility Guidelines (WCAG)
• Plain Language requirements

 

Accessibility Testing Experience

Hands-on experience performing accessibility audits using tools such as:

• WAVE Toolbar
• ARC Toolkit
• Accessibility Insights for Web
• WebAIM Contrast Checker
• Other accessibility testing solutions

Experience testing with assistive technologies including:

• NVDA
• JAWS
• Dragon NaturallySpeaking
• ZoomText

Analysis & Problem Solving

• Ability to research industry best practices, analyze complex information, identify root causes, and develop practical solutions.
• Experience gathering, interpreting, and presenting findings to technical and non-technical audiences.
• Strong critical thinking and problem-solving skills.

Collaboration & Communication

• Experience facilitating meetings, leading discussions, and driving consensus among diverse stakeholder groups.
• Proven ability to work effectively across cross-functional teams.
• Excellent written, verbal, and presentation skills.
• Strong organizational skills with the ability to manage multiple priorities simultaneously.
• Exceptional attention to detail and accuracy.

Preferred Qualifications

• Completion of the W3C Digital Accessibility Foundations – Introduction to Web Accessibility course or equivalent training.
• IAAP certifications such as:
• Web Accessibility Specialist (WAS)
• Certified Professional in Web Accessibility (CPWA)
• Accessible Document Specialist (ADS)

Ideal Candidate

The successful candidate is passionate about digital accessibility and inclusive design, possesses strong technical and analytical skills, and thrives in a collaborative environment. You will play a critical role in helping teams create accessible digital experiences while ensuring compliance with modern accessibility standards and best practices.