Senior Full-Stack Engineer for Cloud SaaS Platform

Atlas; Northern (KY); Hybrid; USD 120,000 - 160,000; Full time

Benefits offered by this job

Flexible PTO

Birthday off

Parental Leave Program

Growth opportunities

Job summary

Atlas HXM is seeking a Senior Software Engineer (Full Stack) to join our Platform Services team and drive end‑to‑end development of a scalable, cloud native SaaS platform for global HR professionals.

You will design and implement core UI with React and build robust microservices using C#/.NET Core, collaborate with product owners, and ensure security and compliance across the stack. This is a fast‑paced, agile role with a focus on quality and impact.

Qualifications

• Bachelor’s degree in computer engineering, computer science, or related technical field, or equivalent work experience.
• 5+ years of progressive work experience in cloud B2B SaaS solutions development including hands-on coding, modern software architecture, open source, containers, and security.
• Proficient in front-end JS frameworks like React JS (Preferred), Angular, Vue.
• Proficient in object-oriented programming languages, experience with .NET Core and C#.
• Knowledge of REST, API Design, API Security Framework, API Management, OpenAPI, Apigee,
• Experience working in microservices architecture, cloud native applications, SOA.
• Understanding of how to design software to support scalability, responsiveness, security and maintainability, and the ability to reason and articulate the design.
• Strong computer science fundamentals, OOAD, SOLID and Design Patterns.
• Familiar with Relational Database Development, Modelling, and Performance Optimization.
• Proven track record of developing complex multi‑layer client enterprise architecture.
• Prior experience working TDD.
• Passionate about building software of the highest quality. An open mind to learn new things and the curiosity to understand how things work.
• Experience developing software solutions within HRIS, Payroll, Tax or Payment Process companies is desirable.

Responsibilities

• The Senior Software Engineer is part of an agile scrum team that is composed of cross functional team members with the capability to develop a product end-to-end and the expectation is to collaborate with other Engineers towards the development of platform microservices (C#, Asp.Net Core Web API, SQL, NoSQL) and UI (React Micro frontend/Container).
• Participate in building the core UI architecture, based on latest ReactJs framework and Micro Frontend pattern. Contribute technically through hands‑on feature development, code reviews, technical design documents, debugging operational issues and process streamlining.
• Collaborate with product owners and other business partners to understand and refine requirements that drive innovative cloud native B2B SaaS solution architecture, technology, and tools.
• Participate in architecture/design discussions and contribute towards the end-to-end journey from inception of the baseline architecture to a customer approved product.
• Provide technical support for the users of the Atlas platform.
• Perform proof‑of‑concept as needed to determine technology solutions.
• Identify open source and commercial solutions for integration.
• Define solution API's and integration with third party systems.
• Participate in security and compliance architecture and implementation to ensure solutions comply with corporate and regulatory policies.

Skills

React

.NET Core

C#

REST API

Microservices

Cloud Native

TDD

OO Design

OpenAPI

Security

Education

Bachelor’s in CS/CE or equivalent

Tools

SQL

NoSQL

OpenAPI tooling

Cloud platforms (Azure/AWS)

Job description

Atlas HXM is seeking a Senior Software Engineer (Full Stack) to join our Platform Services team and drive end‑to‑end development of a scalable, cloud native SaaS platform for global HR professionals.

You will design and implement core UI with React and build robust microservices using C#/.NET Core, collaborate with product owners, and ensure security and compliance across the stack. This is a fast‑paced, agile role with a focus on quality and impact.