Nexdecade Technology (Pvt.) Ltd. leading value added service provider in Bangladesh.  We are working with all mobile telecom operators more than 12 years with different services. Currently we are managing more than 20 million customers, we are the pioneer in development for OTT / IPTV / IOT platform in Bangladesh. We got 200+ employee, Member of Basis and licensed operator from BTRC.

We are seeking a highly qualified and experienced iOS Developer Chat Solution SDK to join our exciting team at Nexdecade Technology (Pvt.) Ltd. As a iOS Developer Chat Solution SDK, you will be responsible for designing, developing, and delivering unique iOS applications that match our client's needs and expectations. We invite you to apply for this role if you are interested in iOS mobile application development and have the requisite abilities.

iOS Developer - Chat Solution SDK
Mid-Level iOS Developer (WebRTC, VoIP, SIP, Real-Time Communication)

As a iOS App Developer, you will be responsible for designing, developing, and delivering unique iOS applications that match our client’s needs and expectations. We invite you to apply for this role if you are interested in iOS mobile application development and have the requisite abilities.

• Develop and maintain an iOS SDK for VoIP and real-time chat solutions, ensuring scalability and reliability.
• Implement SIP-based VoIP calling and WebRTC communication for high-quality audio/video calls.
• Work with GSM codecs for media processing, including audio and video transcoding and transmission across different network conditions.
• Optimize media translation and transcoding for iOS devices to enhance call quality, ensuring low latency and high performance.
• Ensure SDK supports seamless integration with third-party applications, providing easy-to-use APIs for real-time communication.
• Implement secure communication protocols, including end-to-end encryption to protect user data and ensure privacy.
• Optimize SDK performance across various iOS devices, considering network conditions, device limitations, and power consumption.
• Collaborate with backend developers to integrate real-time APIs for messaging, call management, and session signaling.
• Perform rigorous testing for call quality, latency, jitter, packet loss, and adaptability to different network conditions (e.g., Wi-Fi, 3G, 4G).
• Troubleshoot and resolve issues related to network connectivity, media quality, and SDK performance on different iOS devices.
• Collaborate with product and UX teams to ensure intuitive user experiences for making and receiving calls, managing contacts, and viewing message history.

• Strong experience with SIP, WebRTC, and VoIP technologies, including call setup, media transmission, and signaling.
• Experience with RTP, SRTP, and GSM codecs for media processing, transcoding, and handling audio/video streams.
• Proficiency in Swift, SwiftUI, Objective-C(is a plus) for iOS development, with a focus on real-time communication features.
• Deep understanding of network protocols (TCP/UDP, ICE, STUN, TURN), and how to implement them for NAT traversal and connectivity.
• Experience optimizing audio and video communication on iOS devices, including low-latency audio/video streaming and real-time performance.
• Strong problem-solving and debugging skills, with the ability to troubleshoot network and
  media issues in real-time communication.
• Familiarity with CI/CD pipelines for iOS development, including automated testing and
  build processes for ensuring code quality.
• Knowledge of encryption and security best practices for real-time communication,
  ensuring data privacy and secure media transmission.
• Experience with CallKit, PushKit, and managing incoming calls in the background is a plus.
• Familiarity with network simulation tools to test app performance under varying conditions is a plus.

• Experience in video streaming technologies and protocols such as H.264, VP8, or similar.
• Familiarity with real-time messaging frameworks and SDKs, including WebSockets or other push messaging systems.
• Understanding of cloud communication platforms such as Twilio, Agora, or similar services for integration.
• Familiarity with Voice over LTE (VoLTE) technologies or mobile telephony systems is a plus.
• Experience with automated testing tools and frameworks for iOS applications.

• Educational : Bachelor ’s degree in Computer Science, Software Engineering, or related field, or equivalent practical experience.
• Experience : 2-4 years of professional iOS development experience, with at least 1 year working with WebRTC, VoIP, and SIP technologies.

Salary: Negotiable, Most competitive & attractive package in the industry waiting for the deserving candidates

Other Benefits: As per company policy and rules

Job Location: 69/1, Chandrasheela Shuvastu Tower, Panthapath, Dhaka

• Competitive salary and performance-based bonuses.
• Hybrid/Remote flexibility and open working culture.
• Exposure to advanced real-time communication technology stacks.
• Access to learning resources, courses, and tech events.
• Collaborative work culture and career advancement opportunities.

Nexdecade Technology (Pvt.) Ltd. believes every one of its employees, suppliers, downstream partners, visitors, clients and community including children, youth and vulnerable adults that come into contact regardless of age, race, religion, gender, disability or ethnic origin has the right to be protected from all forms of harm, abuse, neglect, harassment, and exploitation. We guarantee assessment of candidates with disabilities who meet the essential requirements. We are proud to be an equal opportunity employer and will do everything possible to ensure that those who are suitable to work within our values and beliefs are recruited to work for us. Any personal persuasion will result in disqualification of candidature.