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Senior Backend Engineer

ID5 / US - Remote / Engineering & Modelling
This job post has now expired. Please see the other ID5 jobs available.
Job Overview

As a Senior Backend Engineer, you will develop new products, redesign and scale existing features, and perform research and testing on Product concepts. You will actively participate in all stages of a feature or product’s life by working closely with our founders and product team.

Our tech stack, which handles +30k QPS with +100B records in our database, includes:

Our backend stack

  • Java / Groovy / Grails / Tomcat

  • Cassandra

Our data stack

  • Apache Spark and Zeppelin

  • Cassandra

  • Elasticsearch / Kibana

Our DevOps stack

  • Continuous integration via Gitlab, excellent automated test coverage and code review process

  • Continuous rollout (several releases per week) with one-step build, test & deployment

What will you do?

  • Work closely with Product to design and develop new or updated features of our products
  • Participate in code reviews as both a reviewer and submitter
  • Provide technical support to our internal and external users
  • Develop and execute technical vision and architecture for Privacy-By-Design features such as Encryption and Merge Instructions
  • Scale the JVM-based backend, Apache Cassandra and Elasticsearch/Kibana to handle an order of magnitude traffic volume
  • Identify opportunities to improve the processes around topics like application security, CI/CD, infrastructure and data processing


  • Someone with several years of work experience, preferably in a highly scalable technology environment
  • A background in Engineering or Computer Science
  • Enjoys collaborating with others and has excellent communication skills
  • Ideally, someone with experience and skills in Java or a language of the JVM (Groovy, Scala, ...), Databases (Cassandra, SQL), Data processing frameworks (Spark, Elastic Stack)
  • Loves learning about new technologies and related tools to introduce to the company to grow the product and development environment
  • An open-minded individual who will thrive in a startup environment. Responsibility, autonomy, enthusiasm, humility, and drive are key characteristics required to be successful in this role

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ID5 Overview

ID5's ambition is to provide premium media owners and independent technology providers with a transparent, scalable, privacy compliant advertising identity solution to help them fight back against these platforms. To accomplish this, ID5 has built the first shared identity platform for the advertising technology industry. ID5 was created by seasoned ad tech specialists with 30+ years of combined experience. It was launched in September 2017 and raised a seed funding round in March 2018. It currently employs 10 people in London and Paris.

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