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Sr. Software Engineer - Java / JS / Node
Denver, Colorado  |  Remote
Direct Hire Position
It appears that you have already applied to this job.
Applied on July 27, 2021
Job Id #47532 Posted May 11, 2021


We're looking for a seasoned Senior Software Engineer to help our team build massively scalable consumer systems for clean energy.




Technical Skills Needed

Candidates are expected to be able to apply the following skills on day 1, and thus should have strong applicable experience:

  • 8+ years experience developing complex, distributed, stateful software systems, particularly with Java, or JavaScript with Node.js.
  • Familiarity with microservice architecture and common patterns (ideally with heavy emphasis in either AWS or GCP)
  • Working with serverless and/or containerized cloud infrastructure.
  • Experience with REST API architecture and development
  • Designing and implementing transactional data models with SQL & NoSQL datastores
  • Applying the practices of continuous integration and continuous delivery.
  • Maintaining deployment pipelines that work with infrastructure as code tools, in particular Github Actions and CDK.
  • Experience with building performant backend applications (ideal candidate would have familiarity with observability tools)
  • Working with git, including branching, merging/rebasing, and pull requests.
  • Familiarity with distributed systems and federated authentication systems
  • Driving the development process with test automation.
  • Applying high quality security practices.
  • Writing code that manages customer data.


Bonus Technical Skills

Candidates will not need to apply these skills on day 1, but they may need to learn them over time with our support. Practical knowledge and experience in the following areas is a bonus:

  • Experience building native lambdas with GraalVM
  • Strong experience in developing and maintaining complex applications in Java (especially JEE experience will be given significant preference)
  • Rules Engine
  • Familiarity with Docker, Serverless architectures like AWS Lambda, and/or DynamoDB, AppSync, Amplify, ECS, EC2, S3, SQS, Kinesis, CloudWatch, CloudFormation, Athena, Aurora, RDS, SageMaker.
  • Experience with API Tooling such as Swagger / OpenAPI
  • Experience in sunsetting / migrating large legacy applications to modern stacks
  • Familiarity with algorithms and data structures
  • Experience at all levels of the testing pyramid (unit, integration, and system tests



  • BS/MS in Computer Science, Engineering or Math is preferred.

Horizontal is proud to be an Equal Opportunity and Affirmative Action Employer. We seek to provide employment opportunities to talented, qualified candidates regardless of race, color, sex/gender including gender identity and/or expression, national origin, religion, sexual orientation, disability, marital status, citizen status, veteran status, or any other protected classification under federal, state or local law.

In addition, Horizontal will provide reasonable accommodations for qualified individuals with disabilities. If you need to request a reasonable accommodation in order to complete the application or interview process, please contact

All applicants applying must be legally authorized to work in the country of employment.

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We do not accept scanned documents, images, or resumes containing images and/or icons.

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  • 1 lowercase letter

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You are considered to have a disability if you have a physical or mental impairment or medical condition that substantially limits a major life activity, or if you have a history or record of such an impairment or medical condition.

Horizontal is proud to be an Equal Employment Opportunity/Affirmative Action Employer providing a drug-free workplace.


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