Full-Stack API Integrations Engineer

Boomtown Accelerators; Leesburg (VA); On-site; USD 120,000 - 160,000; Full time

Job summary

ThrivePass is seeking a skilled backend integration engineer to build and maintain API-driven applications. You will design connectors for SaaS platforms, normalize diverse data, and implement secure authentication flows across providers. The role emphasizes scalable architectures and mentoring teammates in integration best practices.

The ideal candidate has strong C#, .NET, Angular, and SQL experience, with a passion for learning new technologies and collaborating across cross-functional teams.

Qualifications

• 4+ years backend engineering in API-heavy environments.
• Reverse-engineer poorly documented APIs and map JSON/XML payloads.
• REST, GraphQL, and event-driven integrations experience.
• Integration middleware, API gateways, and webhooks knowledge.
• 3+ years .NET web development with C#, Angular 6+.
• OLTP/OLAP data modeling with Entity Framework and SQL Server.
• Strong unit testing, SDLC, and MVC patterns.

Responsibilities

• Develop and maintain .NET web applications using C#, Angular and SQL.
• Design connectors/integrations for SaaS and vendor APIs.
• Map and normalize complex third-party APIs into data models.
• Implement authentication flows and robust API schemas.
• Establish testing, monitoring, and logging for integration reliability.
• Mentor engineers on integration architecture and patterns.
• Collaborate with product teams to deliver features on time.

Skills

API-heavy environments

Reverse-engineer APIs

Data modeling

REST

GraphQL

Event-driven

Integration middleware

API gateways

Webhooks

Async processing

Queues

.NET development

C#

Angular 6+

SQL

HTML

CSS

Entity Framework

OOP

SDLC

MVC

LINQ

Unit tests

Git

JIRA

Tools

Visual Studio

SQL Server

Git

JIRA

Job description

ThrivePass is seeking a skilled backend integration engineer to build and maintain API-driven applications. You will design connectors for SaaS platforms, normalize diverse data, and implement secure authentication flows across providers. The role emphasizes scalable architectures and mentoring teammates in integration best practices.

The ideal candidate has strong C#, .NET, Angular, and SQL experience, with a passion for learning new technologies and collaborating across cross-functional teams.