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I am a Senior Full-Stack Developer with 9 years of experience in web and app development. I am skilled at leading cross-functional teams, delivering high-quality and scalable solutions on time, and driving performance improvements. I have a proven track record with full-stack technologies, consistently increasing user engagement and optimizing product performance. I possess strong leadership abilities and have a passion for mentoring and fostering collaborative, high-performing teams. I thrive on delivering innovative solutions and maintaining excellent client satisfaction throughout all stages of project lifecycles.…I am a Senior Full-Stack Developer with 9 years of experience in web and app development. I am skilled at leading cross-functional teams, delivering high-quality and scalable solutions on time, and driving performance improvements. I have a proven track record with full-stack technologies, consistently increasing user engagement and optimizing product performance. I possess strong leadership abilities and have a passion for mentoring and fostering collaborative, high-performing teams. I thrive on delivering innovative solutions and maintaining excellent client satisfaction throughout all stages of project lifecycles.

Sagar Neupane

Full Stack Developer, Developer, Programmer, +6

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I am a Senior Full-Stack Developer with 9 years of experience in web and app development. I am skilled at leading cross-functional teams, delivering high-quality and scalable solutions on time, and driving performance improvements. I have a proven track record with full-stack technologies, consistently increasing user engagement and optimizing product performance. I possess strong leadership abilities and have a passion for mentoring and fostering collaborative, high-performing teams. I thrive on delivering innovative solutions and maintaining excellent client satisfaction throughout all stages of project lifecycles.…I am a Senior Full-Stack Developer with 9 years of experience in web and app development. I am skilled at leading cross-functional teams, delivering high-quality and scalable solutions on time, and driving performance improvements. I have a proven track record with full-stack technologies, consistently increasing user engagement and optimizing product performance. I possess strong leadership abilities and have a passion for mentoring and fostering collaborative, high-performing teams. I thrive on delivering innovative solutions and maintaining excellent client satisfaction throughout all stages of project lifecycles.

Available to hire

I am a Senior Full-Stack Developer with 9 years of experience in web and app development. I am skilled at leading cross-functional teams, delivering high-quality and scalable solutions on time, and driving performance improvements. I have a proven track record with full-stack technologies, consistently increasing user engagement and optimizing product performance.

I possess strong leadership abilities and have a passion for mentoring and fostering collaborative, high-performing teams. I thrive on delivering innovative solutions and maintaining excellent client satisfaction throughout all stages of project lifecycles.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

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Expert

Expert

Expert

Expert

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Expert

Expert

Expert

Expert

Expert

Expert

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Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Full Stack Developer at HanekeDesign.com

March 31, 2025 - July 9, 2025

Led the end-to-end development of complex, high-performance web applications. Collaborated with clients to gather requirements and design scalable solutions. Led the Shipping CURA project which increased user engagement by 25% within three months using Ruby on Rails and React. Maintained a 100% on-time delivery record. Optimized system performance integrating PostgreSQL, Sentry, and RSpec, ensuring 99.9% uptime. Championed agile methodologies to improve team efficiency by 20%.

Full Stack Developer at Overflow.co

July 31, 2021 - July 9, 2025

Developed and optimized the platform’s core matching system, achieving a 90% success rate in connecting companies with the right talent. Led a major performance optimization initiative resulting in a 150% increase in system speed and reduced latency. Spearheaded a cloud migration from AWS to LocalStack, reducing operational costs and enhancing development agility. Improved UI performance, contributing to a 28% increase in user engagement and a 20% reduction in page load times.

Full Stack Developer at GE Healthcare

May 31, 2018 - July 9, 2025

Contributed to the development and optimization of critical healthcare applications to improve patient outcomes and streamline hospital operations. Worked mainly as a back-end developer building scalable, reliable systems compliant with HIPAA and FHIR healthcare standards.

Full Stack Developer at HanekeDesign.com

March 1, 2025 - August 14, 2025

Managed the entire project lifecycle including requirements gathering, architecture design, coding, testing, and maintenance, ensuring 100% client satisfaction. Led the Shipping CURA project, increasing user engagement by 25% in 3 months and utilizing technologies such as Ruby on Rails, React, Typescript, PostgreSQL, GraphQL, and Sentry. Consistently delivered innovative, on-time solutions and collaborated with cross-functional teams to improve Ruby on Rails app performance and system reliability.

Lead Developer at Arrowheads.co.jp

July 1, 2023 - August 14, 2025

Led mobile app development using Flutter and Django, improving team productivity by 25% and reducing project delivery time by 40%. Implemented state management techniques including Riverpod and GraphQL, reducing app crash rates by 30% and enhancing stability. Drove technical innovation and optimization in the startup, ensuring key milestones and continuous technical process improvements.

Full Stack Developer at Overflow.co.jp

July 1, 2021 - August 14, 2025

Developed and optimized a matching service system connecting Japanese companies with developers, achieving a 90% success rate. Led performance optimization of offers.jp platform resulting in 150% speed improvement, enhancing overall performance. Championed migration from AWS S3 to LocalStack, achieving significant cost savings and agility improvements. Enhanced platform UI and integrated third-party services, raising user engagement by 28% and reducing page load times by 20%.

Full Stack Developer at HanekeDesign.com

March 1, 2025 - August 14, 2025

Managed the full project lifecycle from requirements gathering, architecture design, coding, testing, to maintenance ensuring 100% client satisfaction. Led the development of the Shipping CURA project which increased user engagement by 25% over three months. Utilized technologies including Ruby on Rails, React, Typescript, PostgreSQL, GraphQL, and Sentry. Consistently delivered innovative solutions with a 100% on-time delivery record. Collaborated with cross-functional teams to enhance Ruby on Rails app performance and reliability.

Lead Developer at Arrowheads.co.jp

July 1, 2023 - August 14, 2025

Led development of mobile applications using Flutter and Django, boosting team productivity by 25% and reducing project delivery time by 40%. Implemented state management techniques such as Riverpod and GraphQL, reducing app crash rates by 30% and enhancing stability. Drove technical innovation and process optimization within the startup, ensuring milestone achievements.

Full Stack Developer at Overflow.co.jp

July 1, 2021 - August 14, 2025

Developed and optimized a matching service system to connect Japanese companies with developers, achieving a 90% success rate. Led performance optimization of the offers.jp platform resulting in a 150% speed improvement. Managed the migration from AWS S3 buckets to LocalStack, achieving substantial cost savings and improved development agility. Enhanced platform UI and integrated third-party services, increasing user engagement by 28% and reducing page load times by 20%.