Senior iOS DeveloperLocation: Columbus, OHPosition Type: ContractUS Citizen, Green Card, TN, GC EAD and H4 EAD only No Third-party agencies corp to corp.Job Description:Skills/Experience:Strong mobile UI design and implementation experience, including prototypingExceptional 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 & SecurityStrong 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 durationsComfortable 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 mindExpertise 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