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Sr. iOS Developer
Reynoldsburg , Ohio  |  Remote
Contract Position
It appears that you have already applied to this job.
Applied on October 15, 2021
Job Id #50980 Posted September 29, 2021

Position Description:

  • The responsibility of the mobile Sr. iOS Developer is to provide technology solutions for projects and daily support. 
  • The Sr. Developer ensures adherence to current standards and maintains a commitment to high quality development and implementations. 
  • This individual will provide technology expertise and guidance, remaining current with emerging technologies and industry best practices.


  • Mobile initiatives (support, enhancements or projects):
    • The Sr. Developer will be required to design, develop, test, document, deploy, support and sustain the mobile apps--iPhone, iPad -- interface and libraries.
    • Collaborate with UX for product definition and use cases
    • Assist with defining technical and functional user stories
    • Continuously evaluate, benchmark and improve existing projects.
    • Think outside the box on how to introduce new technology, enhance the user experience and improve code quality.
    • Maintain exceptional code quality.
    • Peer code reviews.
  • Customer Interaction skills: (not all inclusive)
    • Ability to explain technical aspects of a solution to a non-technical audience
    • Prepare and communicate status, issues, and opportunities to the business.
    • Build and maintain strong partnerships with internal and external customers.


  • Strong mobile UI design and implementation experience, including prototyping
  • Exceptional problem-solving skills and logical thinking.
  • Strong understanding of quickly changing mobile development landscape.
  • Strong understanding of RX & traditional programming paradigm.
  • Deep Knowledge on evolving Swift programming language.
  • Experience on Swift UI & Combine is nice to have.
  • Understanding of market leading CI & CD solutions.
  • Expertise in application memory management, identifying and fixing leaks, multithreading, networking & Security
  • Strong understanding of core algorithms and data structures.
  • Experience in developing test cases for the code is a must have. Automated test development is a nice to have skill.
  • Knowledge of A/B testing or persona approaches.
  • Knowledge of Test Driven Development (TDD) would be a nice to have.
  • Experience and passion to work in a fast-paced Agile environment, delivering functional features in small time durations
  • Comfortable working together as a team in estimating and refining user stories and reasoning the estimation.
  • Experience in data management including access, cache management etc.
  • Strong in-depth knowledge in iOS SDK, device APIs, objective C/Swift.
  • Expertise in developing data driven applications.
  • Expertise in developing custom widgets with flexibility and reusability in mind
  • Expertise in Publishing mobile applications to Apple App Store - including packaging, signing, certificate generation & management, iTunes portal access.
  • Expertise in various data exchange protocols like json, soap, protobuff, etc.
  • Expertise with different source code versioning strategies including branching, forking and merging.
  • Expertise in different mobile app architectures & patterns including MVVM, MVC, Factory patterns, Provider patterns, etc.
  • Good knowledge of Flutter, React Native or other tools is a plus

Level of experience 

  • Minimum 5+ years’ experience in native mobile application development (iPhone, iPad) with credible apps published in App Store.
  • Bachelor’s degree in Information Technology, Computer Science, or Management Information Systems or equivalent combination of relevant experience and education

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


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