Senior Software Engineer

Digital Waffle; Berlin; Hybrid; EUR 81,000 - 99,000; Full time

Benefits offered by this job

Hybrid work

Modern Berlin office

Autonomy and ownership

Healthcare subsidy

Transport subsidy

Employee discounts

Job summary

Digital Waffle in Berlin seeks a Senior Backend Engineer with strong Python experience to own key backend services and cloud infrastructure. You will design, develop and evolve backend services in a cloud-based environment, collaborating with cross‑functional teams across product and AI specialties.

Ideal candidates have 5+ years in backend development, hands-on APIs, and deep AWS knowledge. The role offers hybrid work with a Berlin office and opportunities to influence architecture and

Qualifications

• 5+ years of professional backend development experience.
• Strong commercial experience with Python.
• Hands-on experience building APIs and backend services.
• Experience with frameworks such as FastAPI, Django, Flask or similar.
• Strong knowledge of relational databases, particularly PostgreSQL.
• Experience with NoSQL technologies such as DynamoDB would be beneficial.
• Good understanding of AWS and cloud-based architecture, particularly serverless technologies.
• Experience with automated testing and modern software development practices.
• Familiarity with CI/CD tooling such as GitHub Actions.
• Experience with modern Python dependency management tools such as Poetry, uv or pip.
• A good understanding of software architecture, design patterns, scalability and performance is a must.
• Experience working within an agile engineering team.

Responsibilities

• Design and develop scalable backend services in a cloud-based environment.
• Build efficient serverless applications and APIs.
• Work with AWS services such as Lambda, S3 and other AWS services.
• Develop and maintain APIs using FastAPI, Django or Flask.
• Design and optimise data solutions using PostgreSQL and DynamoDB, plus caching.
• Improve application performance, reliability and scalability.
• Establish and improve automated testing across unit, integration and end‑to‑end tests.
• Contribute to CI/CD processes and engineering standards.
• Maintain clean, well-documented and maintainable codebases.
• Collaborate with frontend, QA, product, UX/UI and AI specialists.

Skills

Python

Backend development

API design

AWS

CI/CD

Testing

Agile

GitHub Actions

Python packaging

Tools

FastAPI

Django

Flask

PostgreSQL

DynamoDB

GitHub Actions

Poetry

uv

Job description

We’re working with an established technology business that is continuing to invest heavily in its engineering capabilities. They’re looking for a Senior Backend Engineer with strong Python experience to join a collaborative product team and take ownership of important backend services and cloud infrastructure.

This is a hands‑on role for someone who enjoys building robust systems, improving performance and working closely with engineers across the wider product organisation.

The Role

You’ll play a key role in designing, developing and evolving backend services within a predominantly cloud-based environment.

Your responsibilities will include:

• Designing and developing scalable backend services using Python and AWS
• Building efficient serverless applications and APIs
• Working with technologies such as AWS Lambda, S3 and other AWS services
• Developing and maintaining APIs using frameworks such as FastAPI, Django or Flask
• Designing and optimising data solutions using PostgreSQL, DynamoDB and caching technologies
• Improving application performance, reliability and scalability
• Establishing and improving automated testing, including unit, integration and end-to-end testing
• Contributing to CI/CD processes and engineering standards
• Working with modern dependency and package management approaches
• Helping maintain clean, well-documented and maintainable codebases
• Contributing to the architecture and integration of backend services with other parts of the wider technology ecosystem
• Working closely with frontend engineers, QA, product, UX/UI and AI specialists
• Taking an active role in an agile development environment and contributing ideas that improve how the team works

What We’re Looking For

We’re looking for an experienced backend engineer who enjoys solving technical problems and wants genuine ownership over the systems they build.

You’ll ideally bring:

• 5+ years of professional backend development experience
• Strong commercial experience with Python
• Hands‑on experience building APIs and backend services
• Experience with frameworks such as FastAPI, Django, Flask or similar
• Strong knowledge of relational databases, particularly PostgreSQL
• Experience with NoSQL technologies such as DynamoDB would be beneficial
• Good understanding of AWS and cloud‑based architecture, particularly serverless technologies
• Experience with automated testing and modern software development practices
• Familiarity with CI/CD tooling such as GitHub Actions
• Experience with modern Python dependency management tools such as Poetry, uv or pip
• A good understanding of software architecture, design patterns, scalability and performance is a must
• Experience working within an agile engineering team

What’s On Offer?

You’ll be joining an established technology business with a collaborative engineering culture and plenty of opportunity to influence how things are built.

The package includes:

• Basic salary of up to €90k depending on experience
• Hybrid working with a modern Berlin office
• A high degree of autonomy and ownership
• Subsidised health, transport and lifestyle benefits
• Employee discounts and additional company perks