Senior API Technical Writer

Senior API Technical Writer


As a member of the API writing team in the Product department, the Senior API Technical Writer will create content for the HORISEN products customers and integration partners, while also shaping release information content, corresponding directly with the HORISEN CPO.
Your audience will include a variety of external customers in the telecommunication Industry and partners who are building innovative solutions that work and integrate with the HORISEN Platform. By documenting our platform, API, and SDKs, you’ll help developers extend the HORISEN Platform’s core functionality and integrate other systems with financial data and protocols in the HORISEN Platform.

The Senior API Writer will be customer-oriented, with a proven ability to write for a developer audience. Your focus will be on determining how to best support a developer’s ability to self-service their information needs, using a mixture of material ranging from “getting started” to detailed API reference. You’ll work with members of cross-functional teams, where you’ll use your background in content and writing API documentation to contribute to the success of the HORISEN.


  • 4+ years of technical writing experience
  • Minimum of 2 years writing for a developer audience
  • Direct experience documenting APIs; experience with REST APIs a must
  • Understanding of Web services technologies and HTTP request-response protocol
  • "Hands-on" attitude and passion for technology, including comfort with basic scripting
  • Ability to create basic code examples in one or more current programming/scripting languages
  • Ability to read and understand JavaScript and JSON
  • Ability to create content plans and schedules, meeting milestones and deadlines
  • Experience authoring in a variety of tools: Jekyll (markdown)
  • Swagger, online help tools
  • Strong portfolio of API reference and developer guide writing samples
  • Financial application and/or Telecommunication/Messaging knowledge is a plus
  • Excellent English Skills

Your area of responsibility

  • Create and maintain reference information for API functions and methods
  • Help drive content strategy for developer information at HORISEN
  • Create content that guides developers on getting started, sending and receiving requests between HORISEN Products and external systems, and extending the HORISEN application through our platform
  • Research material through a combination of interviews with subject matter experts and hands-on experience with various APIs, SDKs, and development environments
  • Ensure that API and HORISEN platform documentation is kept current with release updates
  • Publish content, ensuring that material is accessible and available to developers
  • Gathering and writing release notes for HORISEN products (application and API)


HORISEN is an international software company active in the fields of mobile telecommunications and digital marketing.

With our comprehensive cloud software solutions, we’ve become a competent and innovative partner to many mobile phone companies and marketing experts worldwide. Ever since 2001, we have been continuously recognized as market leaders in our business vertical.

As telecom and marketing experts, we specialize in enabling direct communication between brands and their clients via all kinds of mobile messages, e.g. SMS, Messenger, etc. Our software enables our customers to efficiently and reliably send billions of messages to mobile recipients worldwide. We enable communication that is targeted, secure and fast.


Work: very interesting work in a future-oriented industry

Competence: fast decision-making processes and the opportunity to make a personal contribution

Team: motivated and open-minded colleagues in a cooperative working environment

Cooperation: professional and non-bureaucratic cooperation

Workplace: a modern and beautiful working environment in Nis, Paracin, Pirot or Remote (Serbia)

Salary: performance-related pay and good development opportunities

Opportunity: new challenges for personal and career development

We develop, market and sell our own products, which means that we are making our own decisions.

This allows us to give our people freedom - freedom to innovate, creatively solve problems and implement bold resolutions. And we truly value our people - their ideas, commitment and needs.

Together, we built an environment that is innovative, collaborative, flexible and supportive of work-life balance – an environment that encourages people to stay with us for years!


Then please send us your complete application documents including:

  • Details of availability and earliest possible starting date
  • Your salary expectations
Beginning of employment
as soon as possible
Job Location
Paracin, Nis, Pirot or Remote (Serbia)