Python Backend Developer

Epassi; Amsterdam; Hybrid; EUR 70,000 - 110,000; Full time

Job summary

Epassi is seeking a Python Backend Developer to help scale our platform for upcoming migrations. You will identify scaling issues, map customer configurations to system equivalents, and build automation for reliable migrations and growth.

Join a fast-paced team using a modern cloud-native stack (AWS, Kubernetes, PostgreSQL) with REST APIs and CI/CD. Collaborate with Product Owners to deliver high-impact features in a hybrid/remote setup.

Qualifications

• 5+ years of professional Python experience with large codebases.
• Experience with FastAPI, Django, or Flask.
• Strong knowledge of AWS, Kubernetes and PostgreSQL.
• Relational databases and SQL optimization.
• CI/CD pipelines and tools (GitHub Actions, CircleCI, GitLab CI).
• Testing mindset with pytest.
• Proactive, hands-on problem-solving.
• Experience taking projects from design to delivery, including architectural decisions.
• Track record delivering backend projects.
• Good command of written and spoken English.

Responsibilities

• Proactively map components known to be susceptible to scaling issues and propose effective improvements.
• Analyse customer settings including employees, invoicing, and integrations and map them to new equivalents to inform automation strategies.
• Own the design and implementation of the self-service customer portal backend (REST API).
• Maintain and improve cloud infrastructure, including Kubernetes EKS and PostgreSQL RDS.
• Develop, optimise, and maintain CI/CD pipelines using GitHub Actions and related tools.
• Integrate with third-party HR APIs to provide seamless data flows.
• Work closely with Product Owners to define, scope, and deliver high-impact features.
• Support internal stakeholders (Customer Success, Operations) to ensure smooth workflows.
• Expand and improve our existing transactional system.
• Design, implement, and maintain backend services and REST APIs that support scale and performance.

Skills

Python

Backend development

REST APIs

CI/CD

Testing with pytest

Architectural design

English communication

Tools

AWS

Kubernetes

PostgreSQL

GitHub Actions

CircleCI

GitLab CI

Job description

Epassi’s purpose is to boost everyday well-being

We are a leading provider of employee benefit solutions in Europe. We were established in Finland in 2007, and in 2008 we were the first company to launch a mobile-payable employee benefit payment solution in Europe. Since then, we have consistently grown, diversifying our products and introducing our services into new markets. Epassi has been awarded by the Financial Times as one of the fastest-growing companies in Europe on multiple occasions.

Are you interested in joining one of Europe's fastest growing companies? Do you want to impact the wellbeing of millions of users?

If yes, join us to make an impact in a fast-paced and dynamic environment where you’ll play a key role in driving financial accountability, supporting strategic decisions, and enabling sustainable growth.

Epassi’s purpose is to boost everyday well-being. We are a leading provider of employee benefit solutions across Europe. We were established in Finland in 2007, and in 2008 we were the first company to launch a mobile-payable employee benefit payment solution in Europe. Since then, we have consistently grown, diversifying our products and introducing our services into new markets. Epassi has been awarded by the Financial Times as one of the fastest-growing companies in Europe on multiple occasions.

We are currently hiring

Python Backend Developer

Your mission at Epassi

Your mission as a Python Backend Developer is to ensure our platform and processes scale efficiently for the upcoming customer migration. You will identify and mitigate scaling issues, map existing customer configurations to our system equivalents, and help build automation that supports reliable, high-performance migrations and long-term platform growth.

Your Responsibilities Will Be

• Proactively map components known to be susceptible to scaling issues (e.g., slowness, lack of async processing) and propose effective improvements.


• Analyse customer settings including employees, invoicing, and integrations - and map them to new equivalents to inform automation strategies.


• Own the design and implementation of the self-service customer portal backend (REST API).


• Maintain and improve our cloud infrastructure, including Kubernetes EKS and PostgreSQL RDS.


• Develop, optimise, and maintain CI/CD pipelines using GitHub Actions and related tools.


• Integrate with third-party HR APIs to provide seamless data flows.


• Work closely with Product Owners to define, scope, and deliver high-impact features.


• Support internal stakeholders (Customer Success, Operations) to ensure smooth workflows.


• Expand and improve our existing transactional system.

What You’ll Be Doing (daily)

• Designing, implementing, and maintaining backend services and REST APIs that support scale and performance.


• Monitoring and improving infrastructure reliability, performance, and scalability.


• Building and managing CI/CD pipelines to streamline development and deployment.


• Troubleshooting and resolving technical challenges proactively.


• Collaborating with engineering and product teams to deliver high-quality features.

What You Should Bring

• 5+ years of professional Python experience working with complex codebases.


• Hands‑on experience with Python web frameworks (FastAPI, Django, or Flask).


• Strong knowledge of AWS services, Kubernetes, and PostgreSQL.


• Solid understanding of relational databases and SQL query optimization.


• Experience working with CI/CD pipelines and tooling (e.g., GitHub Actions, CircleCI, GitLab CI).


• Strong testing mindset with experience in testing frameworks such as pytest.


• A proactive, hands‑on approach to problem-solving.


• Experience taking projects from design to delivery, including architectural decision‑making.

Your track record

• Successfully delivered end-to-end backend projects.


• Actively improved engineering standards and practices in past roles.


• Known for taking initiative and improving existing systems where possible.


• Comfortable working independently and collaborating within a team.

Your language profile

• Good command of written and spoken English.

Why you should work with us

• Impact at scale: You’ll work on a mission‑critical project that directly contributes to successful customer migrations and platform growth.


• Growth & development: Take ownership, drive improvements, and grow your skills in a supportive environment.


• Flexible work model: Hybrid/remote setup with a collaborative, balanced work culture.


• Modern tech stack: Work with cloud‑native infrastructure, CI/CD automation, and integrations with third‑party services.


• Collaborative culture: Be part of a team that values initiative, quality engineering, and continuous improvement.