Senior Backend Engineer (Python) Tech and Product · HQ ·

Justzapp; London; Hybrid; GBP 50,000 - 90,000; Full time

Job summary

An established industry player is on the lookout for a talented Senior Backend Engineer specializing in Python to join their innovative team. This role offers the chance to design and optimize critical software that drives demand forecasting and stock management. You will take ownership of features from inception to deployment, collaborating with cross-functional teams to ensure technical excellence. With a commitment to disrupting the convenience retail market, this forward-thinking company provides a dynamic work environment where your contributions will directly impact business success. If you are passionate about technology and eager to make a difference, this opportunity is perfect for you.

Benefits

Competitive salary & equity package

25 days of holiday per year

Private Health Insurance

Extended sick pay

Maternity/paternity leave pay

Perkbox

Cycle to work scheme

Flexible/hybrid working arrangement

Weekly employee credit allowance

Qualifications

• 5+ years of experience as a Python developer with expertise in scalable code.
• Hands-on experience with cloud platforms and strong proficiency in Pandas.

Responsibilities

• Build and enhance forecasting models for demand predictions.
• Own the lifecycle of new features from concept to deployment.

Skills

Python

Data manipulation with Pandas

Cloud platforms (GCP, AWS, Azure)

Version control (Git)

Testing best practices

CI/CD pipelines

Education

Bachelor’s degree in Computer Science

Bachelor’s degree in Software Engineering

Bachelor’s degree in Mathematics

Bachelor’s degree in Physics

Tools

Terraform

Job description

Senior Backend Engineer (Python)
Vauxhall, London

As part of our mission, we are seeking a talented Senior Python Backend Engineer to join our dynamic, expanding team. You'll have the opportunity to design, build, and optimise critical software that drives demand forecasting and stock management at Zapp. You’ll be responsible for owning features end-to-end and heavily influencing your own roadmap.

Zapp is London’s leading premium convenience retail platform. Founded in 2020, our vision is to disrupt the multi-trillion dollar convenience retail market, currently dominated by major players, by developing best-in-class customer-centric technology and fulfilment solutions. Zapp partners with some of the world’s leading brands to deliver an exclusive range of hand-picked products 24/7, delivered in minutes.

Core responsibilities:

1. Demand forecasting: Build and enhance forecasting models to improve the accuracy of demand predictions, which impact multiple facets of our business operations.
2. Supply Chain Optimisation: Solve complex, evolving optimisation challenges related to stock movement, ensuring our warehouses and stores maintain optimal stock levels.
3. End-to-End Ownership: Own the lifecycle of new features from concept to deployment, and continuously iterate.
4. Collaboration: Work closely with cross-functional teams to define, design, and implement new features, driving both business and technical excellence.
5. Code Quality: Write scalable, maintainable, and high-quality code while adhering to best practices for testing, deployment, and version control.

Essential skills:

1. Minimum of 5+ years of professional experience as a Python developer.
2. Bachelor’s degree in Computer Science, Software Engineering, Mathematics, Physics, or a related field.
3. Expertise in Python and developing high-quality, scalable code.
4. Hands-on experience with cloud platforms like GCP, AWS, or Azure.
5. Strong proficiency in Pandas for data manipulation and analysis.
6. Solid understanding of testing best practices and writing testable code.
7. Familiarity with version control (Git) and automated deployment pipelines (CI/CD).
8. Ability to dive into large codebases, understand existing architecture, and implement significant feature changes or improvements.

Desirable skills:

1. Experience with Terraform.
2. Familiarity with TypeScript, ReactJS, or NodeJS.

Benefits:

1. Competitive salary & equity package.
2. Enjoy 25 days of holiday per year (plus all bank holidays).
3. Private Health Insurance.
4. Extended sick pay and maternity/paternity leave pay.
5. Perkbox.
6. Cycle to work scheme.
7. Flexible/hybrid working arrangement (60:40 between office/home).
8. Weekly Zapp employee credit allowance.