NB: No recruiters or companies. We only deal with individuals.

Are you looking to work on challenging projects, with a motivated team, while building technology that can change the world? Do you want to join an award winning startup in their scale-up phase? Do you want to give students all over the world access to a prosperous future? Do you want to work with large distributed systems, machine learning, web crawling, and other interesting technology?

Wizenoze is a growth-stage startup which develops software that enables students to find content online that matches their interests and abilities. Our mission is to help close the global Readability Gap. You’ll be responsible for envisioning, developing, and testing products that will improve how students discover and interact with the online world. Read more here about our mission.

We’re looking for a Java backend developer with 4+ years experience based in Amsterdam or remote within the +-3 GMT timezones.


The team


We are an international team of educators, scientists, and developers in child-computer interaction and machine learning. We love proactiveness, ownership, and flexibility. Our HQ is in Amsterdam, our strategic office is in London but we come from all over the world: South Africa, Hungary, the UK and the Netherlands. We work as a distributed team with plenty of remote work support via Asana, Hangouts, Slack, etc. Our development team is smart, small and close-knit, making communication easy without an overload of process and management. We have lots of combined experience and do not settle for mediocre code. We focus on agile development, automated testing, and continuous deployment to get code to customers as quickly as possible while maintaining the highest quality.


What do we offer?


  • Access to the latest technology and algorithms (e.g. from academia);
  • Work on an innovative product that will be used internationally;
  • Work with experienced and innovative engineers and a professional team;
  • An excellent growth perspective;
  • A technically innovative company with multiple opportunities;
  • A flexible working environment;
  • An office in downtown Amsterdam;
  • Well-supported remote work with Slack, Github, Asana, Hangouts, Jenkins CI, AWS, Heroku, etc. tools.


You’ll be responsible for:


  • building and maintaining highly-scalable APIs in Java with Spring;
  • making academic algorithms perform at a commercial level using state of the art machine learning and natural language processing;
  • improving our web crawler and integrations with client content;
  • enhancing our search engine based on elasticsearch;
  • and keeping our cloud-based architecture running smoothly using devops techniques.




  • Fluent in English
  • 4+ years proven experience delivering production-ready software
  • Writing web backends in Java.
  • REST API development. HTTP, JSON, etc.
  • Open source development workflows using git and github.
  • Communicating and collaborating on designs remotely using diagrams, video conferencing, instant messaging, prototypes, etc.
  • Linux admin and shell scripting.
  • Tech:
    • Java
    • Any other languages: Groovy, Bash, Python, Ruby, Go, etc.
    • Git
    • SQL
    • JPA, Hibernate, Flyway


Bonus points:


  • Devops techniques like continuous integration and delivery, zero-downtime deployments, clustering, queues, failover, redundancy, automated and validated backups, etc. See 12factor.net.
  • Managing multiple environments such as production, staging, load testing, etc.
  • Monitoring, alerts, error reporting and metrics. Prometheus, Grafana, Graylog, etc.
  • Tech:
    • MySQL
    • Elasticsearch
    • Apache Storm
    • Javascript, RiotJS, React/Redux, etc. will help you when dealing with the front-end deployments
  • Amazon Web Services:
    • Route53
    • Elastic Beanstalk
    • EC2
    • IAM, security groups, bastion hosts
    • S3
    • Cloudfront
    • RDS
    • SQS
    • Cloudwatch


Your traits:


  • Curious. Able to learn and apply new concepts and tools rapidly
  • Pragmatic
  • Attention to detail
  • Take pride in your work
  • Take responsibility for your work throughout its lifecycle
  • High degree of personal responsibility over designated duties
  • Consistent and organised
  • Timely and eloquent communicator
  • Focused on helping the team win, before personal gain
  • Open to receiving objective criticism and improving upon it
  • Like to work in a startup environment




NB: No recruiters or companies. We only deal with individuals.

Please apply for this job by sending your resume, a brief cover letter, and your portfolio to jobs@wizenoze.com with subject “Java backend developer”.

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