Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I’m Harry, a full stack developer with 12+ years of experience building and supporting web frontend and backend applications, including React-based user experiences and REST/API-driven server functionality. I enjoy turning complex requirements into reliable, data-backed features and improving product behavior through careful debugging, testing, and performance-minded implementation. I’ve worked across multiple environments—from data-heavy document and interactive experiences to authentication, validation, and schema-driven workflows. Alongside day-to-day development with TypeScript, React, SQL, and PostgreSQL, I also integrate AI-assisted workflows (such as summarization and structured processing), collaborate closely with designers and stakeholders, and use disciplined engineering practices like code reviews, pull request automation, and unit/integration testing to ship dependable software.…I’m Harry, a full stack developer with 12+ years of experience building and supporting web frontend and backend applications, including React-based user experiences and REST/API-driven server functionality. I enjoy turning complex requirements into reliable, data-backed features and improving product behavior through careful debugging, testing, and performance-minded implementation. I’ve worked across multiple environments—from data-heavy document and interactive experiences to authentication, validation, and schema-driven workflows. Alongside day-to-day development with TypeScript, React, SQL, and PostgreSQL, I also integrate AI-assisted workflows (such as summarization and structured processing), collaborate closely with designers and stakeholders, and use disciplined engineering practices like code reviews, pull request automation, and unit/integration testing to ship dependable software.

Harry Allen

Full Stack Developer, Web Developer, Software Engineer, +2





I’m Harry, a full stack developer with 12+ years of experience building and supporting web frontend and backend applications, including React-based user experiences and REST/API-driven server functionality. I enjoy turning complex requirements into reliable, data-backed features and improving product behavior through careful debugging, testing, and performance-minded implementation. I’ve worked across multiple environments—from data-heavy document and interactive experiences to authentication, validation, and schema-driven workflows. Alongside day-to-day development with TypeScript, React, SQL, and PostgreSQL, I also integrate AI-assisted workflows (such as summarization and structured processing), collaborate closely with designers and stakeholders, and use disciplined engineering practices like code reviews, pull request automation, and unit/integration testing to ship dependable software.…I’m Harry, a full stack developer with 12+ years of experience building and supporting web frontend and backend applications, including React-based user experiences and REST/API-driven server functionality. I enjoy turning complex requirements into reliable, data-backed features and improving product behavior through careful debugging, testing, and performance-minded implementation. I’ve worked across multiple environments—from data-heavy document and interactive experiences to authentication, validation, and schema-driven workflows. Alongside day-to-day development with TypeScript, React, SQL, and PostgreSQL, I also integrate AI-assisted workflows (such as summarization and structured processing), collaborate closely with designers and stakeholders, and use disciplined engineering practices like code reviews, pull request automation, and unit/integration testing to ship dependable software.

Available to hire

I’m Harry, a full stack developer with 12+ years of experience building and supporting web frontend and backend applications, including React-based user experiences and REST/API-driven server functionality. I enjoy turning complex requirements into reliable, data-backed features and improving product behavior through careful debugging, testing, and performance-minded implementation.

I’ve worked across multiple environments—from data-heavy document and interactive experiences to authentication, validation, and schema-driven workflows. Alongside day-to-day development with TypeScript, React, SQL, and PostgreSQL, I also integrate AI-assisted workflows (such as summarization and structured processing), collaborate closely with designers and stakeholders, and use disciplined engineering practices like code reviews, pull request automation, and unit/integration testing to ship dependable software.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Intermediate

Work Experience

Full Stack Developer at SIDE BENCH

January 1, 2024 - Present

Built features using React, APIs, and relational databases; clarified changes and improved behavior through iterative development. Created frontend for data-heavy document and interactive features while keeping user behavior consistent. Developed and maintained backend integration with authentication handling, data queries, schema/model workflows, and efficient feature patterns. Integrated AI cloud workflows for structured processing such as summarization. Investigated defects by reproducing issues, inspecting traces, and implementing focused fixes with appropriate testing and root-cause validation. Used pull request automation and engineering best practices to convert ambiguous requirements into working implementations.

Full Stack Software Developer at JAFTON

February 1, 2021 - December 31, 2021

Delivered features across customer-facing and internal applications using databases and supporting backend/frontend patterns. Extended existing codebases to reduce regression risk and make unfamiliar changes easier to understand. Built integrations with structured validation, defensive handling of external responses, and safer schema updates when workflows and relationships evolved. Diagnosed bugs using browser logs, traces, and reproducible cases; implemented fixes by iterating with inspection and verification. Added tests for failure-prone areas and participated in reviews to improve quality before release. Worked with designers and stakeholders to clarify early and evolving requirements.

Software Developer at SAVAS LABS

January 1, 2019 - December 31, 2019

Developed an application using React, SQL, and responsive UI patterns with accessibility and consistent behavior across screens. Integrated backend APIs for transformation and authentication, ensuring user-facing conditions were handled correctly. Traced and debugged issues in the application by connecting API records to identified causes. Contributed automated Git documentation and supported application releases through testing and collaboration.

Software Developer at VELO IT GROUP

January 1, 2015 - January 1, 2016

Built and maintained applications using SQL and code plus CSS-based frontend work. Supported database and data operations while maintaining systems and handling how changes flowed through environments. Reproduced issues, focused on engineering fixes, and participated in source testing, deployment, and software releases.