Senior Backend Developer

Commit; Warszawa; On-site; PLN 180,000 - 260,000; Full time

Job summary

Commit in Warsaw is seeking a Senior Backend Developer to join our engineering team and drive the creation of high-performance, scalable backend systems. You will work with Python, Django, and modern cloud technologies to deliver reliable software.

Responsibilities include designing microservices, leveraging AWS services, and managing Kubernetes deployments, while collaborating with cross-functional teams to ensure security, performance, and operational excellence.

Qualifications

• 7+ years of professional software development with backend focus.
• Strong Python experience; Django is a bonus.
• Fluent Ukrainian language and good collaboration skills.

Responsibilities

• Develop, optimize, and maintain robust backend apps in Python (Django is a plus).
• Design and implement scalable microservices architectures.
• Leverage AWS (ECS, EKS, Lambda, S3, RDS) for cloud-based solutions.
• Manage Kubernetes deployments and containerized workloads.
• Ensure performance, reliability, and security of backend systems.
• Collaborate with cross-functional teams to shape architecture and strategy.
• Troubleshoot complex issues and optimize system efficiency.

Skills

Python

Django

Kubernetes

AWS

Microservices

Relational & NoSQL DBs

CI/CD

Docker

DevOps

Team Collaboration

Ukrainian language

Job description

We are a leading technology solutions provider delivering innovative, scalable, and secure solutions to businesses across a wide range of industries. Our mission is to help organizations accelerate digital transformation, optimize their technology infrastructure, and create exceptional customer experiences.

As we continue to grow and expand our technology capabilities, we are looking for a Senior Backend Developer to join our engineering team and contribute to building high-performance, reliable, and scalable backend systems.

Key Responsibilities:

• Backend Development: Develop, optimize, and maintain robust backend applications using Python (Django is a plus).
• Microservices Architecture: Design and implement scalable, efficient microservices architectures to support business needs.
• Cloud Solutions: Leverage AWS services (e.g., ECS, EKS, Lambda, S3, RDS) to design, develop, and deploy cloud-based applications.
• Kubernetes Management: Work with Kubernetes (K8s) to deploy and manage containerized applications ensuring smooth and efficient operations.
• Performance & Reliability: Ensure backend systems maintain optimal performance, reliability, and security to meet business and customer requirements.
• Collaboration & Strategy: Work closely with cross-functional teams to define system architecture and drive technical strategies for product development.
• Troubleshooting & Optimization: Identify and troubleshoot complex issues, applying solutions to improve system efficiency and reduce downtime.

Requirements:

• Experience: 7+ years of professional experience in software development, with a strong focus on backend technologies.
• Technical Skills:Proficiency in Python (Django experience is a bonus).
• Fluency in Ukrainian language
• In-depth understanding of Kubernetes (K8s) for container orchestration and management.
• Experience in developing and deploying cloud solutions using AWS services, including ECS, EKS, Lambda, S3, and RDS.
• Strong background in microservices architecture and distributed systems.
• Database Knowledge: Experience working with both relational and NoSQL databases.
• Problem-Solving: Strong debugging skills and a deep understanding of performance optimization techniques.
• Team Player: Ability to collaborate effectively with other developers, product managers, and engineers to ensure the success of key projects.

Preferred Qualifications:

• Knowledge of continuous integration and continuous delivery (CI/CD) pipelines.
• Experience with containerization tools like Docker.
• Familiarity with DevOps principles and practices