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Senior Backend Engineer - Python

Qubex

Qubex

Software Engineering
Tel Aviv-Yafo, Israel
Posted on Nov 7, 2025

Senior Backend Engineer - Python

  • R&D
  • Tel - Aviv
  • Senior
  • Full-time

Description

Welcome to Zesty, a dynamic startup at the forefront of cloud optimization innovation!

Zesty’s Mission

Zesty is a startup company specializing in automated optimization solutions, aiming to help organizations reduce costs and enhance operational efficiency. The company offers a range of products designed for DevOps and FinOps teams responsible for managing cloud usage within organizations.

Position Overview

We’re expanding our team to lead the next evolution of cloud commitment management—building a next-generation solution from the ground up.

As a Backend Developer, you’ll be part of a greenfield initiative developing an innovative product that automates cloud cost optimization across AWS, Azure, and GCP.

Our mission: to empower customers with smarter, data-driven cost efficiency—without compromising flexibility.

This role centers on backend excellence — you’ll take full ownership of designing and implementing scalable APIs, architecting robust distributed systems, and solving complex engineering challenges. You’ll optimize performance at scale and help establish the technical foundations for a product built to last.

If you thrive in a fast-paced startup environment, love building from scratch, and want to influence both the architecture and the engineering culture from day one — this is your opportunity to make a real impact.

Your Ownership Will Include:

  • Designing and developing scalable, end-to-end features using Python.
  • Collaborating with PMs, designers, and cloud experts to turn complex challenges into impactful product features.
  • Taking full ownership of core components and contributing to key architectural and design decisions.
  • Integrating with internal systems and external APIs, including major cloud providers.
  • Driving best practices in code quality, testing, automation, and CI/CD workflows.
  • Participating in code reviews and fostering a culture of engineering excellence.

Requirements

  • 6+ years of experience in backend development.
  • Strong proficiency in Python.
  • Experience with cloud platforms (AWS, GCP, Azure).
  • Excellent problem-solving, analytical thinking, and the ability to work autonomously.
  • Proven experience with relational (PostgreSQL, MySQL) and NoSQL databases.

Nice to Have:

  • Hands-on experience with containerization (Docker, Kubernetes) and service orchestration.
  • Familiarity with data pipelines and big data platforms.
  • Strong working knowledge of Azure.

Why is it exciting being a Zester-

At Zesty, we're a team of driven, forward-thinkers passionate about pushing the boundaries of cloud optimization. Our culture encourages creativity, curiosity, and a willingness to embrace challenges.

We care about:

  • Diversity & Inclusion - Be yourself! We welcome employees from all backgrounds and have created a workplace where everyone can feel empowered.
  • Transparency - Transparency: We share our success stories, failures, processes, numbers, and everything in between. If you want to know something that wasn't shared with you – just ask!
  • One Team- We genuinely trust each other which enables us to act as one team working together toward the same mission. All team members are equally important
  • Open Communication & Feedback -When facing challenges, we always look for fresh ideas and ways to overcome them and We embrace constructive feedback that can and should be given to anyone
  • Ego is out at the door - Ego obscures and disrupts everything: the planning process, the ability to take good advice, and the ability to accept constructive feedback. We operate with a high degree of humility