Senior Software Developer (Frontend / Flutter)

United States Digital Space LLC; Singapore; On-site; SGD 70,000 - 110,000; Full time

Job summary

United States Digital Space LLC seeks a Senior Front-end Developer to lead a team in designing and building scalable mobile UI systems across websites and apps. You will bridge frontend and backend teams, ensuring accessible, performant experiences with robust testing and troubleshooting.

You will guide Flutter-based development, optimize the Flutter engine and framework, and shape reusable software components while mentoring junior engineers for quality delivery.

Qualifications

• Bachelor's degree in CS or related field.
• 4+ years of Android or iOS development experience.
• Strong knowledge of Flutter, Dart, and UI principles.

Responsibilities

• Develop and maintain core modules of mobile products with quality code and reviews.
• Optimize performance and user experience of mobile apps.
• Use Dart for multi‑platform development (Flutter).
• Contribute to Flutter engine/framework performance optimizations.
• Explore new technologies and monitor platform construction.
• Develop Flutter's basic library and associated tooling.

Skills

Dart

Flutter

Android development

iOS development

UI development

Education

Bachelor’s degree in Computer Science or related field

Job description

The Role:

The Senior Front-end developer plans, designs, builds, and implements the user interface systems of websites, software programs, and web-based applications. He is to lead a team of junior engineers to provide a satisfactory user experience with no issues, errors, or downtime.

He creates and optimizes systems, plays an active role in testing and troubleshooting, and resolves issues such as those related to accessibility and browser compatibility. He often serves as an intermediary bridging the gap between the user and the backend developers, and tweaks tools and platforms to adapt to real-world use situations.

Job Responsibilities:

• Responsible for the development and maintenance of the core modules of mobile products, code review, and writing relevant technical documents;
• Responsible for optimizing the quality, performance, and user experience of mobile products;
• Using Dart programming language for multi-platform development
• Responsible for the performance experience optimization of the Flutter engine and framework,
• Monitoring platform construction, and the exploration of underlying new technologies;
• Responsible for the development of Flutter's basic library, engineering experience, R&D toolchain, etc.;
• Work on frontend services platform and application development
• Oversee the web and mobile application architecture
• Challenging programming and software design problems
• Provide support for critical application problems and issues
• Provide operational support for web systems and application platforms
• Analyze users' needs and design software
• Promote software design/testing/coding best practices
• Demonstrate great maturity and skill in software design and development practice
• Debug and troubleshoot software issues
• Paying attention to the software development process practiced by the team
• Assist in the authoring of software tools that reliably manage application delivery
• Utilize the appropriate frameworks to develop reusable software packages and software services

Job Requirements:

• Bachelor’s degree in Computer Science or related field
• Good data structure and algorithm foundation, solid programming skills;
• Four or more years of Android or iOS development experience, with complete commercial-grade mobile phone application or game development project development experience;
• Have solid programming skills, good code style, and strong ability to analyze and solve problems;
• Familiar with iOS or Android system mechanisms and features, proficient in UI, network, XML/JSON parsing, and other development technologies;
• Familiar with the Flutter framework and Dart language, proficient in using various Flutter layouts and animations, and have a certain understanding of Java or OC;
• Possess demand analysis and system design capabilities, as well as strong logical analysis and independent problem-solving capabilities;
• Positive and optimistic, strong sense of responsibility, serious and meticulous work, good team communication and collaboration skills;