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I am a Software Engineer and Tech Lead with 5 years of experience focusing on performance engineering, AI-driven solutions, security, and high-quality UI/UX to build scalable and reliable systems. I have led the development of LLM-based applications and applied cutting-edge AI technologies such as semantic search to deliver innovative solutions. Throughout the product lifecycle, I combine soft skills with technical leadership to boost team productivity, engage with customers, and deliver robust, user-centric solutions. I am passionate about high performance and innovation and strive for long-term resilience. In my roles, I prioritize practical, user-focused design and secure, scalable architectures, ensuring that teams deliver robust software while maintaining a positive, collaborative work environment.…I am a Software Engineer and Tech Lead with 5 years of experience focusing on performance engineering, AI-driven solutions, security, and high-quality UI/UX to build scalable and reliable systems. I have led the development of LLM-based applications and applied cutting-edge AI technologies such as semantic search to deliver innovative solutions. Throughout the product lifecycle, I combine soft skills with technical leadership to boost team productivity, engage with customers, and deliver robust, user-centric solutions. I am passionate about high performance and innovation and strive for long-term resilience. In my roles, I prioritize practical, user-focused design and secure, scalable architectures, ensuring that teams deliver robust software while maintaining a positive, collaborative work environment.

Atsushi Hatakeyama

Full Stack Developer, Web Developer, Back-End Developer, +3

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I am a Software Engineer and Tech Lead with 5 years of experience focusing on performance engineering, AI-driven solutions, security, and high-quality UI/UX to build scalable and reliable systems. I have led the development of LLM-based applications and applied cutting-edge AI technologies such as semantic search to deliver innovative solutions. Throughout the product lifecycle, I combine soft skills with technical leadership to boost team productivity, engage with customers, and deliver robust, user-centric solutions. I am passionate about high performance and innovation and strive for long-term resilience. In my roles, I prioritize practical, user-focused design and secure, scalable architectures, ensuring that teams deliver robust software while maintaining a positive, collaborative work environment.…I am a Software Engineer and Tech Lead with 5 years of experience focusing on performance engineering, AI-driven solutions, security, and high-quality UI/UX to build scalable and reliable systems. I have led the development of LLM-based applications and applied cutting-edge AI technologies such as semantic search to deliver innovative solutions. Throughout the product lifecycle, I combine soft skills with technical leadership to boost team productivity, engage with customers, and deliver robust, user-centric solutions. I am passionate about high performance and innovation and strive for long-term resilience. In my roles, I prioritize practical, user-focused design and secure, scalable architectures, ensuring that teams deliver robust software while maintaining a positive, collaborative work environment.

Available to hire

I am a Software Engineer and Tech Lead with 5 years of experience focusing on performance engineering, AI-driven solutions, security, and high-quality UI/UX to build scalable and reliable systems. I have led the development of LLM-based applications and applied cutting-edge AI technologies such as semantic search to deliver innovative solutions. Throughout the product lifecycle, I combine soft skills with technical leadership to boost team productivity, engage with customers, and deliver robust, user-centric solutions. I am passionate about high performance and innovation and strive for long-term resilience.

In my roles, I prioritize practical, user-focused design and secure, scalable architectures, ensuring that teams deliver robust software while maintaining a positive, collaborative work environment.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Japanese

Intermediate

Work Experience

Tech Lead / Software Engineer at Tata Consultancy Services

January 1, 2024 - Present

As tech lead for our in-house AI product (RAG) application with Agile, responsible for overall architecture, development direction, and project management. Guided UI development using Atomic Design principles, improving response times from 1s to 0.5s through refactoring and user-driven iteration and improved UI/UX based on heuristic evaluation. By applying optimistic updates for in-chat operations, values were updated instantly, improving perceived performance by over 1 second and optimizing API design. Optimized unit tests with Jest, raising test coverage from 80% to 100% and ensuring quality assurance and regression prevention throughout over a year of project involvement.

Software Engineer at Asia Quest

December 31, 2023 - September 8, 2025

Led efforts to enhance the security of the infrastructure environment as part of vulnerability mitigation. Implemented Docker best practices and conducted permission audits of the infrastructure environment, contributing to the prevention of security incidents. Responsible for the infrastructure and backend development of web services utilizing geospatial data such as GeoJSON and Shapefiles. Optimize database and simplified complex systems handling more than 50GB of geospatial data and tile information, reducing the API response time from 1.5 seconds to 0.5 seconds and achieving a 66% performance improvement.

Software Engineer / Tech Lead at Tata Consultancy Services

January 1, 2024 - Present

Tech lead for an in-house AI product (RAG) with Agile, responsible for overall architecture, development direction, and project management. Guided UI development using Atomic Design principles, improving response times from 1s to 0.5s through refactoring and user-driven iteration. Implemented optimistic updates for in-chat operations to improve perceived performance and optimized API design. Improved test quality by elevating Jest coverage from 80% to 100%, ensuring QA/regression prevention throughout the project.

Software Engineer at Asia Quest

December 31, 2023 - September 8, 2025

Applied the Facade Pattern to separate concerns between React and Three.js to prevent memory leaks and sustain high performance. Led security enhancements for the infrastructure, implemented Docker best practices and permission audits, and managed backend infrastructure for web services handling geospatial data (GeoJSON and Shapefiles). Optimized database performance for over 50GB of geospatial data, reducing API response times from 1.5s to 0.5s (66% improvement).

Software Engineer at Tata Consultancy Services

January 1, 2024 - Present

Tech lead for in-house AI product (RAG) application, responsible for architecture, development direction, and project management. Guided UI development using Atomic Design principles, improving response times from 1s to 0.5s via refactoring and user-driven iteration. Implemented optimistic updates for in-chat operations improving perceived performance by over 1 second and optimized API design. Optimized unit tests with Jest, raising test coverage from 80% to 100% and ensuring quality assurance and regression prevention.

Software Engineer at Asia Quest

December 31, 2023 - September 8, 2025

Infrastructure backend development and security improvements for web services handling geospatial data (GeoJSON, Shapefiles). Implemented Docker best practices and permission audits. Optimized database handling of 50GB+ geospatial data and tile information, reducing API response time from 1.5s to 0.5s (66% performance improvement).