Sr. Software Engineer

Fuel Talent LLC; Seattle (WA); On-site; USD 165,312,000 - 206,640,000; Part time

Job summary

Fuel Talent LLC is seeking a Senior Software Engineer in Seattle to drive a large-scale ERP transformation to Microsoft Dynamics 365 Finance & Operations. The role centers on owning the data migration workstream, building SQL-based ETL pipelines, and supporting API-driven integrations across legacy SQL/SSIS systems and cloud tools.

You will partner with the Integration Program Lead and a focused engineering team, delivering data mappings, validation frameworks, and cutover plans tied to a

Qualifications

• 5–8 years of backend or data-focused software engineering experience.
• Advanced SQL expertise with complex joins and performance tuning.
• Hands-on experience with SSIS and SQL Server Agent jobs.
• Experience delivering large-scale data migration efforts (ETL, reconciliation, cutover).
• Proficiency in C# with debugging and problem-solving skills.
• Ability to document technical designs and data mappings clearly.

Responsibilities

• Own data migration workstream and design ETL pipelines for D365 F&O.
• Refactor legacy ETL pipelines and modernize SQL/SSIS workloads.
• Develop backend services and D365 F&O data entities and DMF packages.
• Create and maintain validation/test frameworks for go-live data.
• Collaborate with integration engineers and stakeholders to define mappings and runbooks.

Skills

Advanced SQL

C# programming

Data migration

Backend development

Debugging

Documentation

ETL

REST APIs

OAuth 2.0

Legacy systems

Windows/SQL Server

Tools

SSIS

SQL Server Agent

Azure Data Factory

Azure Synapse

DMF (Dynamics 365 F&O) data entities

MuleSoft exposure

Azure DevOps

Job description

# Sr. Software EngineerApplyApplyPosted 5 days agoShareSeattle, WA$65 Hourly**Overview** Our client is undergoing a large-scale ERP transformation, migrating from a legacy system to Microsoft Dynamics 365 Finance & Operations (D365 F&O). This Senior Software Engineer will play a critical role in that initiative, owning the data migration workstream while supporting non-middleware integration efforts across the program. You’ll partner closely with the Integration Program Lead and a small, focused engineering team, working across legacy SQL/SSIS systems, modern APIs, and cloud-based tools. This is a high-impact, high-visibility role tied to a program with a defined go-live timeline.---**What You’ll Do** Data Migration Design and build SQL-based migration scripts to extract, transform, and load data into D365 F&O. Partner with functional leads and data owners to define and validate field-level mapping. Execute mock migrations, reconcile outputs, and track defects through resolution. Build and maintain validation frameworks to ensure data completeness and accuracy at go-live. Support cutover planning, including sequencing, timing, and rollback validation. Legacy System Modernization (SQL / SSIS) Assess existing SSIS packages and SQL Server Agent jobs to determine what should be migrated or retired. Refactor legacy ETL pipelines to align with modern infrastructure and D365 requirements. Document embedded logic within legacy systems that may lack formal documentation. Collaborate with integration engineers to transition logic from SQL-based workflows to API-driven patterns where appropriate. Backend & API Development Build supporting backend services, utilities, and tooling to fill integration gaps. Develop and extend D365 F&O data entities, DMF packages, and OData integrations. Write and maintain utility scripts (C#, Python, or PowerShell) for migration and operational support. Support development of test harnesses, data seeding tools, and QA automation. Collaboration & Documentation Contribute to technical design documents, data mapping specifications, and operational runbooks. Participate in design reviews and proactively identify risks. Partner with business stakeholders to understand data structures and transformation requirements. Operate with a documentation-first mindset to ensure long-term maintainability.---**What You Bring Required** 5–8 years of experience in backend or data-focused software engineering roles Advanced SQL expertise (complex joins, window functions, stored procedures, performance tuning) Hands-on experience with SSIS and SQL Server Agent jobs Experience delivering large-scale data migration efforts (ETL, reconciliation, cutover) Proficiency in C# Strong debugging and root-cause analysis skills across complex systems Ability to work through ambiguous or undocumented legacy environments Clear and effective technical documentation skills---**Highly Preferred** Experience with Microsoft Dynamics 365 F&O (DMF, data entities, OData APIs, or X++) Background working with legacy ERP systems in regulated or complex environments Experience with Azure data tooling (Data Factory, Synapse, etc.) Familiarity with API-based integrations (REST, JSON, OAuth 2.0) Prior involvement in enterprise-scale ERP implementations or migrations---**Nice to Have** Exposure to MuleSoft or similar integration platforms (conceptual understanding) Experience with Azure DevOps for backlog management and CI/CD Background in construction, engineering, or related industries