This is what it's about
Please note: The part-time scope is 80-100%. You can use our office in Berlin or work completely remotely within Germany.
You want to use your Ruby on Rails experience for a good cause? You want to contribute to a product that makes a difference? You want to play a key role in our development team to drive the growth of Koalect by RaiseNow, an innovative Tech4Good company?
As Senior Backend Engineer (f/m/d) in our team you will improve and extend our product with end-to-end responsibility. You are involved in everything from research, coding, testing and deploying to documentation.
Your mission
* Design, development and maintenance of our Koalect services
* Technical (and related product) research for extending the current set of features on Koalect services
* You share your findings with other team members, including documentation
* Operational tasks in keeping Koalect stable, incl. monitoring and On-Call duty (additionally compensated)
* Cross-Team coordination to bring new features live
* Ensure code quality by performing code reviews and coaching junior team members
* Educate the team about your experience, by creating learning paths & organising knowledge sharing sessions
* Maintenance and improvement of the AWS infrastructure to ensure availability of the services in a DevOps mindset
Your profile
* Proficiency in the ecosystem of Ruby on Rails
* Knowledge of RESTful APIs and event-driven systems (designing and reasoning)
* Proficiency in AWS (EC2, ECS, EBS, RDS) and ER database systems like PostgreSQL
* Good knowledge of docker and docker compose
* Familiar with unit and functional testing as well as code reviews, git workflows, and continuous delivery approach
* Fluent in written and verbal English (at least C1)
* Striving for simplicity and when it’s not possible, keeping an eye on the devil in the details
Nice to have:
* Knowledge with Bitbucket CI pipelines
* Experience in server administrations (linux), bash scripting
* Familiarity with security concerns in AWS
Our Tech Stack
* Ruby 3.2.2
* Ruby on Rails 7.2 (moving to 8 Q4 2025)
* Cucumber for functionals behaviour driven tests
* PostgreSQL 13 (master/master for replication), Redis
* ELK stack
* Docker containers for CI/CD, dev and production
* CI/CD on bitbucket pipelines
* Services are hosted on AWS: ElasticBeanstalk, SQS, S3, lambda, EC2, RDS, ElastiCache, Route53, CloudFront
* Vue.JS 2/3
Your learnings
You’ll become an expert in Koalect concepts. In particular
* How to develop software at a large scale - reliably and securely
* Working in a cross-functional team (front and back end)
Why RaiseNow
* A future-oriented job in a meaningful environment with an international team
* Enjoy flexibility around your working time and place: We offer flexible work schedules with annual working time as well as temporary working abroad options all in a remote first setup
* 5 weeks paid annual leave plus additional PTO days per year with RaiseNow + your birthday as PTO
* We know that time is precious: We’re part of the pledge 1% initiative, offer sabbatical options and yearly educational leave for everyone
* The perks of joining a scaleup: short decision paths, transparent communication and regular team events + one workation per year to meet all colleagues in one spot
* An innovative working environment with a culture of transparency, trust, and mutual respect
* Project autonomy and space for personal development from the beginning
We're RaiseNow, and we're passionate about making charitable giving more cost-efficient, donor-friendly, and successful. Our technology is supporting organisations like Save the Children International, WWF, Amnesty, UNICEF, and many others.
With our work, we contribute to making the world a better place. In our remote-first setup we cherish our strong team spirit and believe work can be both: meaningful and fun.
Our daily work is guided by our six team values: freedom, growth, team spirit, purpose, diversity and appreciation as well as trust and respect.
Through our work we tackle some of the biggest challenges that our planet faces.
If you love to learn and thrive in a culture shaped by trust, respect and freedom, join us on our exciting journey!