Senior Backend Engineer — Payroll & AI Platform

Mosaic.tech; United States; On-site; USD 170,000 - 220,000; Full time

Benefits offered by this job

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Job summary

HiBob is expanding its payroll product with a senior backend engineer who will own the design, development, testing, and deployment of backend services in a modern microservices setup. You will work with product managers and frontend engineers to deliver scalable APIs and customer-facing features for thousands of users.

Ideal candidates have 6+ years in backend engineering, strong relational database experience, and proficiency with AWS.

Qualifications

• 6+ years of professional backend software engineering experience.
• Experience building customer-facing SaaS products from inception to launch with thousands of users.
• Experience with relational databases like PostgreSQL, MySQL, etc.
• Excellent knowledge of software design and scalable architecture.
• Experience with testing methodologies – unit-testing, TDD, mocking, etc.
• Experience with AWS or an equivalent cloud platform.

Responsibilities

• Design, develop, and maintain highly scalable back-end systems for the Payroll product using a modern microservices architecture.
• Collaborate with product managers, front-end engineers, and other stakeholders to implement new features and ensure alignment with the overall product roadmap.
• Write clean, maintainable, and efficient code in Kotlin, Scala, or Java (or be eager to learn Kotlin).
• Build and optimize APIs to support seamless integrations across our platform.
• Participate in code reviews and provide constructive feedback to team members.
• Take ownership of the full development cycle, including technical design, implementation, testing, deployment, and monitoring.
• Work in a continuous delivery environment with automated QA processes to ensure robust and reliable releases.

Skills

Backend development

Relational databases

Testing & TDD

AWS / cloud platforms

Code reviews

SaaS product development

Team collaboration

Microservices architecture

Security & quality

Tools

PostgreSQL

MySQL

Kotlin/Java/Scala

Job description

HiBob is expanding its payroll product with a senior backend engineer who will own the design, development, testing, and deployment of backend services in a modern microservices setup. You will work with product managers and frontend engineers to deliver scalable APIs and customer-facing features for thousands of users.

Ideal candidates have 6+ years in backend engineering, strong relational database experience, and proficiency with AWS.