Reito Serizawa

Software Engineer

New York City, New York, United States6 yrs 6 mos experience

Key Highlights

Over 2 years of full-stack development experience.
Expertise in AWS and Python for scalable solutions.
Strong background in business development and consulting.

Stackforce AI infers this person is a Full-stack Software Engineer with a strong focus on Fintech and Travel Media industries.

Contact

Skills

Core Skills

AwsPythonJavascriptReact.jsBusiness DevelopmentMarketing StrategySalesProject ManagementConsulting

Other Skills

Software InfrastructureSoftware IndustryWeb EngineeringEngineeringSoftware DesignAmazon EC2Amazon Relational Database Service (RDS)Amazon Route 53Amazon S3Python (Programming Language)DjangoGemniFAISSLangChainCI/CD

About

I am a full-stack software engineer based in NYC. I was born in Japan and studied abroad/worked in Japan, Hong Kong, Australia, China, and the U.S. I have over 2 years of full-stack development experience. Before becoming a software engineer, I was in the sales, consulting and business development roles for over 3 years working closely with strategic consultants to help their global projects. Outside of the coding, I like playing an acoustic guitar and playing with my puppy. I am also learning ASL.

Experience

6 yrs 6 mos

Total Experience

1 yr

Average Tenure

Current Experience

Lendmetrix

Software Engineer

Jun 2025 – Nov 2025 · 5 mos · New York City Metropolitan Area

● Owned the full-stack development of the company’s core financial SaaS platform, aligning technical execution with business goals.
● Collaborated with leadership on engineering decisions to shape product direction while balancing short-term deliverables with long-term scalability.
● Built internal tooling, improved testing structure, and documented workflow to support reliable delivery.
● Designed and managed AWS services and created CI/CD pipelines to automate deployments.
● Supported hiring and onboarding, and mentored other engineers to ramp up the team and ensure code quality.

Software InfrastructureSoftware IndustryWeb EngineeringEngineeringSoftware DesignAWS+12

Skift

Full-stack Software Engineer

Apr 2023 – Nov 2024 · 1 yr 7 mos · New York City Metropolitan Area · Remote

● Built and maintained 3+ production platforms for global travel media and intelligence products.
● Reduced API response times ~40% by optimizing queries and implementing caching layers.
● Integrated the 3rd party APIs and SDKs, such as Recurly, Auth0, and HubSpot.
● Refactored legacy codebase, boosting test coverage by 35% and improving maintainability.
● Delivered interactive, responsive front-end components in collaboration with UI/UX and backend teams.

JavaScriptMongoDBNode.jsGitFlaskReact.js+11

Career break

Relocation

Dec 2021 – Mar 2023 · 1 yr 3 mos · New York City Metropolitan Area

Immigrating to the U.S. from Japan and studying software engineering at Flatiron School (NYC)

Bluecity蓝城兄弟

Marketing Business Development Manager

May 2020 – Oct 2021 · 1 yr 5 mos · Tokyo, Japan

Initiated business development and marketing activities by leading software development and marketing teams.
Built relationships with 6 nonprofit organizations (NPO), 3 corporations, and 500+ lesbian, gay, bisexual, and transgender (LGBTQIA+) related facilities, and executed collaborations through educational activities, co-produced products, and offline events.
Pitched online advertisement plans focusing on segregated areas of Japan and signboard plans in Tokyo and Osaka, and managed each advertisement accordingly.

Business DevelopmentMarketing StrategyMarketing

Ebay

Associate Sales Manager, Business Development

Jun 2019 – May 2020 · 11 mos · Tokyo, Japan

Generated sales leads and acquired large merchants for cross-border trade opportunities through meetings, calls, and seminars.
Assessed the clients’ needs and advised effective selling and marketing plans in addition to installing third-party tools to reduce workforce and cost.
Developed partnerships with e-commerce software solution vendors and collaborated with their services to improve client revenue.

Business DevelopmentSalesCustomer Relationship Management (CRM)

Alphasights

2 roles

Associate, Client Service Team

May 2018 – Apr 2019 · 11 mos

Managed client relationships by regularly communicating throughout the projects and successfully grew existing accounts by “in-account user growth.”
Was responsible for 35+ projects across Consumer Goods (30%), Healthcare (20%), and Financial Services (16%) as a project lead and in cooperation with global offices.
Contributed to the generation of ¥2,000,000 monthly in profits, on average, on projects across both Japanese and global markets.

Project ManagementCustomer Relationship Management (CRM)Consulting