Senior Flutter Developer

PT. SIGMA GLOBAL TEKNOLOGI (SIGMATECH); Jakarta Selatan; On-site; IDR 200,000,000 - 420,000,000; Full time

Benefits offered by this job

Competitive compensation

Diverse challenging projects

Professional development

Collaborative tech team

Flexible working arrangements

Job summary

PT. SIGMA GLOBAL TEKNOLOGI (SIGMATECH) seeks a Senior Flutter Developer to lead mobile app design and development in a contract role based in South Jakarta. You will architect solutions, mentor juniors, and drive best practices across mobile initiatives.

You will own end‑to‑end Flutter development for iOS and Android, collaborating with product and design teams to deliver robust and scalable applications with high usability. Strong English communication is essential.

Qualifications

• 5+ years of software development experience with at least 3+ years in Flutter.

Responsibilities

• Design and develop high‑performance mobile apps using Flutter for iOS and Android.
• Lead technical architecture and implement complex features with quality code.
• Mentor junior developers and provide code reviews.
• Collaborate with product managers and designers to translate requirements into scalable solutions.
• Optimize performance, implement robust error handling and monitoring.
• Contribute to full SDLC including planning, development, testing, and deployment.
• Stay updated with Flutter changes and best practices to share knowledge.
• Troubleshoot and resolve complex issues efficiently.
• Document development standards and technical guidelines.

Skills

Dart programming

Flutter framework

Mobile architectures

RESTful APIs

Git workflows

CI/CD

Problem solving

English communication

Education

Bachelor's degree in CS/Engineering

Tools

Git

CI/CD pipelines

Testing frameworks

Job description

About the role

PT. SIGMA GLOBAL TEKNOLOGI (SIGMATECH) is seeking an experienced Senior Flutter Developer to join our growing technology team. This is a contract position based in South Jakarta, Jakarta. In this role, you will take a leadership position in designing, developing, and maintaining high-quality mobile applications using Flutter. You will be responsible for architecting solutions, mentoring junior developers, and driving technical excellence across our mobile development initiatives. This position is pivotal to our strategy of delivering robust, scalable, and user‑centric mobile applications to our clients.

Key responsibilities

Design and develop high-performance mobile applications using Flutter for both iOS and Android platforms

Lead the technical architecture and implementation of complex features, ensuring code quality and adherence to best practices

Mentor and guide junior developers, providing code reviews and technical guidance to foster team growth

Collaborate with product managers, designers, and other stakeholders to translate requirements into scalable technical solutions

Optimise application performance, identify bottlenecks, and implement improvements to enhance user experience

Implement and maintain robust error handling, logging, and monitoring systems

Participate in the full software development lifecycle, including planning, development, testing, and deployment

Stay current with Flutter updates, emerging technologies, and industry best practices, sharing knowledge with the team

Troubleshoot and resolve complex technical issues in a timely manner

Contribute to the development of technical documentation and development standards

What we’re looking for

5+ years of professional software development experience, with at least 3+ years specifically working with Flutter

Strong proficiency in Dart programming language and deep understanding of Flutter framework architecture

Proven experience developing and deploying production‑grade mobile applications on both iOS and Android platforms

Solid understanding of mobile design patterns, state management solutions (such as Provider, BLoC, or Riverpod), and responsive UI design

Experience with RESTful APIs, JSON parsing, and integration with backend services

Familiarity with version control systems (Git) and collaborative development workflows

Knowledge of mobile application security best practices and data protection principles

Excellent problem‑solving skills and ability to work effectively in a team environment

Strong communication skills in English, with the ability to articulate complex technical concepts

Experience with continuous integration and deployment (CI/CD) pipelines is advantageous

Previous experience mentoring or leading development teams is preferred

Familiarity with testing frameworks and test‑driven development (TDD) is a plus

What we offer

• Competitive compensation package commensurate with experience
• Opportunity to work on diverse and challenging projects with cutting‑edge technologies
• Professional development and continuous learning opportunities
• Collaborative and innovative work environment with a talented technical team
• Flexible working arrangements tailored to project requirements
• Exposure to international standards and best practices in software development
• Career advancement opportunities within a growing technology company

About us

PT. SIGMA GLOBAL TEKNOLOGI (SIGMATECH) is a forward‑thinking technology company dedicated to delivering innovative software solutions and digital transformation services. With a focus on mobile development, web applications, and enterprise solutions, we serve clients across various industries. Our mission is to leverage cutting‑edge technology to solve complex business challenges and drive digital innovation. We pride ourselves on fostering a culture of excellence, collaboration, and continuous improvement, where our talented team members are empowered to create impactful solutions that make a difference in the digital landscape.