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Senior Backend Engineer (NXJ-184)

Newxel, Ukraine
Рівень:
senior
Джерело:
jobs.dou.ua
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The Role

The challenge isn’t just writing backend services; it’s owning the complete development cycle within a high-velocity continuous delivery environment. You will drive feature execution from initial technical design through testing, deployment, and real-time monitoring. Operating in a decoupled microservices architecture that deploys to production dozens of times a day, your primary focus will be designing and scaling core platform capabilities for massive concurrent traffic.

About the Product

The product is a globally scaling B2B HRIS SaaS platform engineered for midsize and multinational enterprises to manage, connect, and retain talent. Operating at enterprise scale, the platform serves over 1 million active users across thousands of companies. It is designed to handle complex data workflows, real-time engagement analytics, and collaborative global HR operations through an intuitive, data-driven system architecture.

Technology Stack: The backend ecosystem is built on a microservices architecture designed for high scalability and throughput. The data tier relies on relational databases, utilizing PostgreSQL and MySQL for stable data storage and management. The engineering culture enforces strict testing methodologies, including unit testing, mocking, and TDD setups, to support a true continuous delivery environment where automated QA pipelines deploy to production dozens of times daily.

What You’ll Be Doing

Own the entire backend development cycle from initial technical design and scalable architecture through to deployment and monitoring

Design and implement resilient backend features that directly support high-load data workflows and global platform scaling

Drive the evolution of a highly decoupled microservices architecture to ensure optimal performance and fault tolerance

Maintain and expand automated testing suites using TDD, unit tests, and mocking frameworks to guarantee seamless, zero-downtime production deployments

Collaborate directly with the Product team to translate complex user engagement scenarios into robust, production-ready system capabilities

Optimize database queries and schema designs to ensure efficient data processing for over a million users globally

What We Expect

Must-have

5+ years of professional software engineering experience with a dedicated focus on production-level backend development

Excellent command of software design patterns and highly scalable system architecture

Strong practical experience with relational databases, specifically PostgreSQL and MySQL

Hands-on experience implementing core testing methodologies, including unit testing, mocking, and TDD

Nice-to-have

Production experience with Kotlin, Scala, or Java

Direct experience working with AWS or an equivalent cloud platform

Why This Role Is Worth Your Time

You will work in a true continuous delivery environment, seeing your code ship to production dozens of times a day without manual QA bottlenecks

The engineering culture is highly autonomous—you aren’t just taking tickets; you are owning backend features from architectural design to live metrics

The platform is experiencing massive global momentum (triple-digit year-over-year growth), providing hard distributed systems and data-scaling challenges that look great on any engineer’s resume

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