AHAmirhossein HemmasiSoftware developer

I build thoughtful software for real-world teams.

Frontend-focused software developer with full-stack experience across React, TypeScript, Node.js, PostgreSQL, and AWS.

View selected workLinkedIn
Based in
Calgary, Alberta, Canada
Working in software since
2019
Core focus
React & TypeScript
About

Product-minded engineering, grounded in the details.

I care about clean interfaces, reliable systems, and making complex work feel straightforward for the people using it.

I’m Amirhossein, a software developer who works comfortably from polished UI components through API integration and data storage.

My experience spans software delivery, full-stack development, and IT leadership. That range helps me understand both the product in front of a user and the operational systems supporting it behind the scenes.

6+Years building for the web
4Professional organizations
3Layers: UI, API, data
Experience

A track record across product, platform, and operations.

From hands-on frontend delivery to IT leadership, each role has sharpened how I approach dependable software.

01
Sustainable Projects Group (SPG)

Front End Developer

Build and improve user-facing features for the JOBI platform, integrate APIs, test and refine interfaces, and contribute to performance and maintainability with product, design, and backend teammates.

ReactMaterial UIJavaScriptNode.jsAWSPostgreSQL
02
Sustainable Projects Group (SPG)

Front End Developer (contract)

Contributed to SPG web product development under a remote contractor arrangement before moving to the Calgary-based full-time role.

ReactMaterial UIJavaScriptAWSPostgreSQL
03
Khoy Textile Company

IT Manager

Managed business databases, information security, inventory and ERP systems, the company website, and employee technical support.

DatabasesERPInformation securityIT operations
04
Robust Choice

Frontend Developer

Built features for the Personize.ai Google Sheets add-on, including data workflows, batch processing, credits, and integrations.

Google Apps ScriptJavaScriptAPIsData workflows
05
Organic Minded

Frontend and Full-stack Developer

Worked across requirements, UI implementation, API development, and database design for web products.

.NETC#REST APIsSQLUI development
Selected work

Full-stack product thinking, made concrete.

WorldSignal brings together product design, data engineering, research, and a careful approach to communicating uncertainty.

Private local projectIn active development

Energy market impact intelligence

WorldSignal

A research-driven application that explains what oil-market changes may mean for downstream energy prices and everyday or business costs.

The Market Impact experience brings together current oil movement, historical relationships for gasoline, diesel, and jet fuel, and recent energy headlines with plain-language impact notes.

ReactTypeScriptViteFastifyPythonPostgreSQL
Read the case study

No public demo is available yet. The application and source repository remain private.

WorldSignalMarket impact
Market contextFrom oil movement to practical impact
Observed market movementOilDated context and units
Historical relationshipGasoline
Historical relationshipDiesel
Historical relationshipJet fuel
Recent energy context

Headline with a simple impact note

Facts kept separate from estimates

Product-flow illustration — not live market data.
WorldSignal case studyHow the product turns complex market context into a cautious, readable explanation.
01 / What it does

Make downstream effects easier to understand.

WorldSignal connects oil-market context with the energy products people and businesses encounter. It is an analytics and research product—not a trading tool, financial advice, or a promise about future prices.

02 / Market Impact flow

A clear path from signal to context.

  1. See how oil is movingStart with an observed market fact, including its date, unit, and status.
  2. Compare historical relationshipsReview how gasoline, diesel, and jet fuel have historically followed oil without presenting the relationship as a forecast.
  3. Read recent energy headlinesPair bounded headline collection with short, cautious impact notes.
  4. Separate facts from estimatesKeep source context and historical inference visibly distinct.
03 / My work

End-to-end product implementation.

I developed and locally verified the product across its React interface, TypeScript API and ingestion workers, Python research components, PostgreSQL data layer, authentication work, and API/UI test coverage.

04 / Architecture

Purpose-built layers with clear responsibilities.

InterfaceReact · TypeScript · Vite
Application APIFastify · TypeScript
Data collectionTypeScript workers
ResearchPython · ML experiments
StoragePostgreSQL
05 / Decisions

Trust before prediction.

  • Label dates, units, and data status instead of hiding uncertainty.
  • Use cautious historical language and avoid claiming oil will move in a particular direction.
  • Keep observed facts separate from historical relationships and derived impact notes.
  • Leave the earlier direction-forecasting research frozen after approaches near 50–52% did not meet its former target; it is not presented as a reliable product capability.
Capabilities

A practical toolkit for shipping complete experiences.

Strongest in frontend development, with enough backend, data, and cloud depth to work across a modern product stack.

01

Frontend

Interfaces that feel clear, fast, and dependable.

ReactTypeScriptJavaScriptVue 3HTML & CSSMaterial UIBootstrapAG Grid
02

Backend

Practical services and integrations for real products.

C#.NET CoreREST APIsEntity FrameworkADO.NETMVCOOP & design patterns
03

Data & cloud

Solid foundations from storage through deployment.

SQL ServerMySQLBigQueryAWSAzureGoogle CloudCI/CD
04

Ways of working

Collaborative habits that keep work moving forward.

GitAzure DevOpsAgile / ScrumClickUpRetoolGoogle Apps Script
Education

Continuous learning, from software foundations to communication.

B.Sc. Mechanical Engineering

Tehran Azad University

Microsoft Full-stack Software Engineering in .NET

Sematec Institute

Advanced C# Programming

Sematec Institute · Professional Certificate

.NET Fundamentals & SQL Server Database Design

Sematec Institute · Professional Certificates

Open to conversations

Have a product problem worth solving?

I’m a frontend-focused full-stack developer in Calgary, interested in thoughtful products, strong engineering teams, and work where the details matter.

Calgary, Alberta, CanadaFrontend · Full-stack