Formunauts GmbH | Vollzeit

Senior Backend Engineer (f/m/d)

Vienna, Österreich | Posted on 05/01/2026

Job Information

Date Opened 05/01/2026
Job Type Vollzeit
Industry Development
Work Experience Keine
City Vienna
State/Province Wien
Country Österreich
Zip/Postal Code 1010

Job Description

We are Formunauts – a fast-growing SaaS company with a clear mission:

We support more than 100 charities in Europe and Latin America in achieving their goals. Our clients include Amnesty International, Doctors Without Borders, WWF and Greenpeace.

Since 2014, our award-winning software has helped make fundraising campaigns more efficient, increasing the funds available for meaningful projects. Since 2020, we have been operating the world’s first marketplace for face-to-face fundraising, opening up new potential for organizations and social impact startups.

In short: We build technology that enables real-world impact.

Your Role

We are looking for a Senior Backend Engineer who enjoys taking ownership, thinking beyond individual tickets and actively shaping a growing platform.

In our environment, backend engineering means more than implementation. You will be involved in technical decision-making, architectural evolution and improving how we build and run our systems. As we grow, this role can naturally evolve towards technical leadership or a lead position, depending on your interests and strengths.

What You’ll Do

Drive the further development of our backend systems and services
Take part in architectural decisions and backlog prioritization
Refactor and improve existing codebases, reducing technical debt
Build and enhance APIs to make our platform more accessible and scalable

Senior Backend Engineer (f/m/d)