Kenta Akahori

Senior Software Engineer

Coalition Technologies

Dec 2023 - Current (2 years 8 months)

• Led the design and engineering of distributed microservice backend system using Python, delivering high-performance APIs for large-scale eCommerce platform. • Delivered an AI-powered search that converts natural-language queries into weighted keywords with user-adjustable relevance, improving search accuracy by 35%, increasing user engagement by 25%, boosting conversion rates by 1.8%, and reducing time-to-find by 40%. • Designed and delivered end-to-end data processing pipelines for large-scale eCommerce platforms, managing high-throughput ingestion, transformation, and real-time data flows across distributed systems, while ensuring scalability, fault tolerance, and consistency to support business-critical operations and analytics. • Redu

Senior Software Engineer

Amazon

Oct 2022 - Nov 2023 (1 year 2 months)

• Led the selection and definition of end-to-end technology stacks across backend, frontend, data pipelines, and AWS cloud infrastructure, balancing trade-offs in scalability, performance, cost, and maintainability to support large-scale eCommerce and data-driven systems. • Led a phased migration from Node.js to Python for data-intensive and AI-driven services, improving performance, scalability, and alignment with the machine learning ecosystem while maintaining system stability. • Owned end-to-end feature development, from requirements gathering and system design to implementation, testing, and production deployment, ensuring scalable, high-quality, and reliable delivery. • Owned the end-to-end development of eCommerce mobile applications

Software Engineer II

Amazon

Oct 2020 - Sep 2022 (2 years)

• Designed and implemented scalable applications that handled high-volume data analytics and visualizations for engineering simulations. • Built secure authentication & authorization using JWT, OAuth, and AWS Cognito. • Implemented A/B testing and event tracking to compare key metrics like click-through rate, conversion, and time-to-result between the old and new search. • Applied Test-Driven Development (TDD) to deliver high-quality, maintainable code, ensuring reliability and reducing regression risks in production systems. • Optimized platform performance using Redis caching, CDN, and database query optimization.

I

Software Engineer

Incentro

Apr 2018 - Sep 2020 (2 years 6 months)

• Developed and maintained healthcare backend features using PHP(Laravel), building scalable APIs and integrating third-party services. • Ensured platform compliance with GDPR and European healthcare regulations by designing secure architectures, enforcing data protection controls, and maintaining audit readiness. • Improved performance and code quality through refactoring, modular architecture, and adherence to best practices. • Contributed unit tests, resolved bugs, and collaborated on front-end-backend integration.

I

Internship

Incentro

Nov 2017 - Mar 2018 (5 months)

• Built both the backend and frontend components of the visualization tool, focusing on dynamic data-driven UI elements. • Collaborated with the design team to create a dynamic user interface. • Delivered detailed documentation for internal teams.

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