> Markdown version of [/jobs/ext/4648724-fullstack-software-engineer-ii-rebates](https://www.wearedevelopers.com/jobs/ext/4648724-fullstack-software-engineer-ii-rebates). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Fullstack Software Engineer II, Rebates

- **Company:** Appextremes, LLC
- **Location:** Boston, MA, United States
- **Experience:** Experienced
- **Salary:** $97,620 - $156,190
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), JavaScript (Programming Language), Application Programming Interfaces (APIs), Automation of Tests, Microsoft Azure, Code Review, Data Security, Document-Oriented Databases, Design of User Interfaces, Human-Computer Interaction, Java Database Connectivity, Java Web Services, Junit, Liquibase, Microsoft SQL Server, E2e Testing, Dropwizard, Standard Sql, Software Engineering, SQL Databases, Transaction Data, TypeScript, GitHub Copilot, ReactJS, Spring-boot, Backend, Data Lakes, Kubernetes, Playwright, Cosmos DB, Front End Software Development, Claude, React Testing Library, Api Design, Docker, Databricks
- **Published:** November 9, 2026
- **Apply:** https://www.careerbuilder.com/job-details/fullstack-software-engineer-ii-rebates-boston-ma--c48d97f6-f089-44bd-badd-2d1751b9175f

## About the Role

Software Engineering, Team Building, Purchasing/Procurement, Pricing, Software Engineering, Product Development, Application Programming Interface (API), Data Modeling, User Interface/Experience (UI/UX), Project/Program Management, * 3 to 5 years of professional software engineering experience across frontend and backend systems.

 * Strong Java skills and hands-on experience with React and TypeScript.
 * Working knowledge of SQL, API design, and automated testing.
 * Ability to deliver well-scoped work independently and collaborate across application, data, and deployment boundaries.
 * Experience with AI-assisted development is strongly preferred, especially using GitHub Copilot, Claude, or similar tools effectively in a professional engineering workflow.

Technology Experience...

 * Spring Boot, Dropwizard, JDBI, Liquibase, Microsoft SQL Server, or Azure Cosmos DB.
 * Azure DevOps, Docker, Kubernetes, Helm, or other Azure services.
 * Databricks, Delta Lake, or data-intensive financial calculations.
 * Jest, React Testing Library, Playwright, or JUnit.

## Description

The Full Stack Software Engineer II builds and improves Conga''s Rebates platform, a core part of how our customers manage rebate programs and calculate results from their transaction data. The team owns the full experience: the user interface for managing rebate programs, the APIs and data models behind it, and the accrual workflows that turn transaction data into accurate results.

In this role, you''ll own features end to end across frontend, backend, and data boundaries, partner with teammates on sound technical decisions, and help ship reliable changes to production.

This role is a great fit for an engineer with 3 to 5 years of experience who enjoys working across the stack and wants real ownership of a product customers depend on for financial accuracy.

Why It''s a Big Deal...

 * Build accessible, maintainable features in a React and TypeScript application and connect them to backend APIs.
 * Design and implement Java services, REST endpoints, business rules, and data access code for rebate workflows.
 * Work with SQL-backed and document data, including schema changes and migrations.
 * Contribute to accrual processing and troubleshoot data correctness and performance issues in distributed jobs.
 * Write unit, integration, and end-to-end tests, review code, and investigate production issues.
 * Partner with the team to improve build, deployment, and observability workflows.