Application Engineering Senior Developer - .NET Full Stack&Integrations; - EY General Delivery Service

Location: CABA

Other locations: Primary Location Only

Date: 22 Sept 2026

Requisition ID: 1741323

Application Engineering Senior Developer – .NET Full Stack & Integrations

Job Summary

The Application Engineering Lead is responsible for designing, building, and owning complex full stack applications and enterprise integrations. This role requires deep technical expertise across .NET, API integrations, databases, and data pipelines, along with strong ownership of production systems, migration activities, and critical cutovers. The role operates with minimal supervision and serves as a key technical decision maker and escalation point.

Application Development & Integrations
- Lead the design and implementation of API integrations using REST, JSON, and industry standard authentication mechanisms (OAuth2, JWT, API keys, etc.).
- Lead the design and Implementation of Front end applications using Angular/HTML/Typescript
- Build and maintain robust, secure,



and scalable integrations with structured error handling, logging, and retry mechanisms.
- Design and implement reverse and batch integrations across internal and external systems.
- Act as the technical authority for complex integration patterns, data flows, and migration solutions.

Database & Data Engineering
- Design and develop SQL Server solutions, including complex queries, stored procedures, performance tuning, and indexing strategies.
- Perform production data fixes with strong governance, validation, and audit controls.
- Implement and manage ETL and data pipelines using Azure Data Factory (ADF) and/or SSIS.
- Handle large scale, high volume data processing, ensuring data accuracy, reconciliation, and integrity across systems.

Production Ownership & Reliability
- Own end to end accountability for critical production systems and integrations.
- Lead production issue triage, root cause analysis, and remedi

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