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Hi, I'm Thoma Tagashira, a full-stack developer and technical founder with a passion for building scalable and secure SaaS, fintech, and data-driven platforms. I specialize in crafting end-to-end cloud-native solutions using technologies like Django, React, TypeScript, and AWS. I love transforming complex business requirements into reliable, production-ready software while collaborating closely with cross-functional teams. With experience leading projects from the ground up, including launching a SaaS platform for construction cost estimation and contract management, I enjoy solving challenging problems and continually adapting to new technologies. When I'm not coding, I engage with developer communities and contribute to innovative projects involving AI and real-time data workflows.…Hi, I'm Thoma Tagashira, a full-stack developer and technical founder with a passion for building scalable and secure SaaS, fintech, and data-driven platforms. I specialize in crafting end-to-end cloud-native solutions using technologies like Django, React, TypeScript, and AWS. I love transforming complex business requirements into reliable, production-ready software while collaborating closely with cross-functional teams. With experience leading projects from the ground up, including launching a SaaS platform for construction cost estimation and contract management, I enjoy solving challenging problems and continually adapting to new technologies. When I'm not coding, I engage with developer communities and contribute to innovative projects involving AI and real-time data workflows.

Thoma Tagashira

Full Stack Developer, Developer, App Developer, +2

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Hi, I'm Thoma Tagashira, a full-stack developer and technical founder with a passion for building scalable and secure SaaS, fintech, and data-driven platforms. I specialize in crafting end-to-end cloud-native solutions using technologies like Django, React, TypeScript, and AWS. I love transforming complex business requirements into reliable, production-ready software while collaborating closely with cross-functional teams. With experience leading projects from the ground up, including launching a SaaS platform for construction cost estimation and contract management, I enjoy solving challenging problems and continually adapting to new technologies. When I'm not coding, I engage with developer communities and contribute to innovative projects involving AI and real-time data workflows.…Hi, I'm Thoma Tagashira, a full-stack developer and technical founder with a passion for building scalable and secure SaaS, fintech, and data-driven platforms. I specialize in crafting end-to-end cloud-native solutions using technologies like Django, React, TypeScript, and AWS. I love transforming complex business requirements into reliable, production-ready software while collaborating closely with cross-functional teams. With experience leading projects from the ground up, including launching a SaaS platform for construction cost estimation and contract management, I enjoy solving challenging problems and continually adapting to new technologies. When I'm not coding, I engage with developer communities and contribute to innovative projects involving AI and real-time data workflows.

Available to hire

Hi, I’m Thoma Tagashira, a full-stack developer and technical founder with a passion for building scalable and secure SaaS, fintech, and data-driven platforms. I specialize in crafting end-to-end cloud-native solutions using technologies like Django, React, TypeScript, and AWS. I love transforming complex business requirements into reliable, production-ready software while collaborating closely with cross-functional teams.

With experience leading projects from the ground up, including launching a SaaS platform for construction cost estimation and contract management, I enjoy solving challenging problems and continually adapting to new technologies. When I’m not coding, I engage with developer communities and contribute to innovative projects involving AI and real-time data workflows.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Japanese

Fluent

Work Experience

Technical Founder / Full-Stack Engineer at FairBuild

September 1, 2022 - Present

Launched a cloud-native SaaS platform (fairbuildapp.com) for cost estimation and contract management in construction and home services. Architected the platform using Django, React, PostgreSQL (RDS), and AWS, maintaining 99% uptime for early adopters. Built secure APIs, Stripe-integrated billing, and Docker-based CI/CD pipelines to support automated deployments and continuous delivery. Implemented OpenAI embeddings and PGVector for fast semantic search, boosting user productivity and data relevance. Led cross-functional teams in iterative feature delivery, testing, onboarding, and technical documentation.

Software Engineer (Contract) at Upwork

June 1, 2025 - Present

Engineered reusable brokerage API platforms supporting live/historical options trading with E*TRADE, Tastytrade, Public, and LightSpeed. Automated complex data flows for quote retrieval, order placement, and account management using Python async programming and multi-threaded optimization. Designed secure REST/OAuth workflows for multi-account, multi-broker expansion, ensuring compliance and reliability for enterprise use cases. Integrated custom websocket connections for real-time data ingestion from external APIs (e.g., Polygon for LightSpeed). Collaborated directly with technical and non-technical stakeholders to refine requirements and deliver production-ready solutions.

Operations Manager at Ocean Beauty Seafoods, LLC.

January 31, 2022 - July 15, 2025

Directed cross-functional logistics, supply chain, and IT system upgrades for a major food distributor. Implemented new tracking, reporting, and analytics solutions to improve operational efficiency. Managed 7 department heads and 50–100 staff, reporting to executive leadership.