Sr .NET Full-Stack Developer / Technical Lead
Posted
Summary
Maintains and enhances BGC Group's internal HR/recruitment platform (timesheets, payroll/CPF, invoicing, onboarding, recruiter workflows) built on C#/.NET 8, ASP.NET Core MVC, EF Core/MySQL, and MongoDB, with Salesforce and Microsoft Graph integrations. Also handles releases, background jobs, production incident triage, and automated testing.
We are looking for an experienced developer to maintain and enhance an established HR and recruitment platform covering timesheets, payroll/CPF calculations, invoicing, onboarding, and recruiter workflows.
Key responsibilities Develop and maintain features using C#/.NET 8, ASP.NET Core MVC, Razor, JavaScript, and jQuery. Translate business requirements into focused technical changes with clear acceptance criteria. Maintain payroll, CPF, timesheet, leave, invoicing, and recruitment logic in collaboration with business owners. Maintain EF Core/MySQL data access, database migrations, and MongoDB-backed dynamic schemas and workflows. Support Salesforce ATS and Microsoft Graph integrations, including synchronization, authentication, reconciliation, and error recovery. Maintain Hangfire background jobs and SignalR/Redis features; address retries, concurrency, and duplicate-processing risks. Diagnose production incidents, calculation discrepancies, slow queries, and integration failures. Coordinate releases across multiple codebases and tenant environments, including configuration management, deployment verification, rollback, and zero-downtime release procedures. Write and maintain automated tests, review changes, and protect existing behavior. Maintain authentication, permissions, audit trails, and secure handling of employee and candidate data. Document technical decisions, deployment procedures, operational issues, and recovery steps. Identify practical improvements to reliability, performance, and maintainability.
Required qualifications Proven experience maintaining substantial production applications using
C# and ASP.NET Core MVC . Strong knowledge of
.NET 8, Razor, dependency injection, async/await, LINQ, and MediatR/CQRS . Hands-on experience with
EF Core, MySQL, transactions, migrations, indexing, and query optimization . Experience with
MongoDB , including document modeling, schema evolution, aggregation, and indexing. Strong working knowledge of
JavaScript, jQuery, HTML, CSS, AJAX, and form validation . Experience developing and troubleshooting
REST API integrations , preferably Salesforce and Microsoft Graph. Understanding of
OAuth/OIDC, JWT, MFA, authorization, and application security . Experience with
Hangfire
or comparable background-job systems. Ability to write meaningful automated tests using
MSTest or equivalent frameworks . Proficiency with
Git , code review, build/publish tooling, and release management. Practical experience deploying and troubleshooting
.NET applications on Linux using Nginx and supervisord . Ability to maintain several related codebases and manage differences in configuration and behavior. Understanding of financial calculation accuracy, decimal precision, rounding, and traceable rule changes.
Preferred experience HR, recruitment, payroll, CPF, invoicing, or other compliance-sensitive applications. Salesforce
SOQL/NetCoreForce
and Microsoft
Graph/Entra ID . Metadata-driven forms, dynamic schemas, and workflow platforms such as Ditto. SignalR and Redis . PDF/Word generation using
DinkToPdf, Open XML, or MiniWord . Singpass or other digital-signature integrations. AI API integrations, structured document extraction, and secure context handling. DigitalOcean hosting, CI/CD pipelines, backup restoration, and disaster recovery.
Key responsibilities Develop and maintain features using C#/.NET 8, ASP.NET Core MVC, Razor, JavaScript, and jQuery. Translate business requirements into focused technical changes with clear acceptance criteria. Maintain payroll, CPF, timesheet, leave, invoicing, and recruitment logic in collaboration with business owners. Maintain EF Core/MySQL data access, database migrations, and MongoDB-backed dynamic schemas and workflows. Support Salesforce ATS and Microsoft Graph integrations, including synchronization, authentication, reconciliation, and error recovery. Maintain Hangfire background jobs and SignalR/Redis features; address retries, concurrency, and duplicate-processing risks. Diagnose production incidents, calculation discrepancies, slow queries, and integration failures. Coordinate releases across multiple codebases and tenant environments, including configuration management, deployment verification, rollback, and zero-downtime release procedures. Write and maintain automated tests, review changes, and protect existing behavior. Maintain authentication, permissions, audit trails, and secure handling of employee and candidate data. Document technical decisions, deployment procedures, operational issues, and recovery steps. Identify practical improvements to reliability, performance, and maintainability.
Required qualifications Proven experience maintaining substantial production applications using
C# and ASP.NET Core MVC . Strong knowledge of
.NET 8, Razor, dependency injection, async/await, LINQ, and MediatR/CQRS . Hands-on experience with
EF Core, MySQL, transactions, migrations, indexing, and query optimization . Experience with
MongoDB , including document modeling, schema evolution, aggregation, and indexing. Strong working knowledge of
JavaScript, jQuery, HTML, CSS, AJAX, and form validation . Experience developing and troubleshooting
REST API integrations , preferably Salesforce and Microsoft Graph. Understanding of
OAuth/OIDC, JWT, MFA, authorization, and application security . Experience with
Hangfire
or comparable background-job systems. Ability to write meaningful automated tests using
MSTest or equivalent frameworks . Proficiency with
Git , code review, build/publish tooling, and release management. Practical experience deploying and troubleshooting
.NET applications on Linux using Nginx and supervisord . Ability to maintain several related codebases and manage differences in configuration and behavior. Understanding of financial calculation accuracy, decimal precision, rounding, and traceable rule changes.
Preferred experience HR, recruitment, payroll, CPF, invoicing, or other compliance-sensitive applications. Salesforce
SOQL/NetCoreForce
and Microsoft
Graph/Entra ID . Metadata-driven forms, dynamic schemas, and workflow platforms such as Ditto. SignalR and Redis . PDF/Word generation using
DinkToPdf, Open XML, or MiniWord . Singpass or other digital-signature integrations. AI API integrations, structured document extraction, and secure context handling. DigitalOcean hosting, CI/CD pipelines, backup restoration, and disaster recovery.