Lynda Toko | Senior Software Developer Portfolio

Senior Software Developer Portfolio

Lynda Toko

Full Stack Software Developer | React, TypeScript, JavaScript, .NET, APIs, AWS, Azure, Cloud Systems

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I am a Senior Software Developer with more than 10 years of experience designing, developing, testing, maintaining, and improving web applications, APIs, cloud based systems, CMS platforms, e commerce workflows, and practical business software.

My strength is building real systems from idea to working product. I design user workflows, structure data, write frontend and backend logic, integrate APIs, improve reliability, and turn business problems into usable software.

This portfolio highlights selected professional experience and product level engineering work. Source code, security logic, database structures, and confidential implementation details are intentionally not public.

Full Stack Development API First Architecture SaaS Product Thinking Cloud Ready Systems Frontend Engineering Business Automation

Contact Me LinkedIn View TOGOUON Lead CRM

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What I Bring To A Team

I combine hands on coding with architecture, product thinking, debugging discipline, and practical delivery. I can join an existing engineering team, improve legacy systems, build new features, document decisions, and translate business needs into technical solutions.

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10+ Years Software development and engineering experience

Full Stack Frontend, backend, APIs, databases, and integrations

Cloud Ready AWS, Azure, CI/CD, deployment, and system planning

Product Mindset Systems built around real users and real workflows

Productized Platforms Built From Real Business Needs

These two platforms are presented separately because they show end to end software capability: product analysis, UX design, frontend development, backend architecture planning, customer workflow logic, provider integration concepts, and SaaS readiness.

Live Product Platform / CRM / Full Stack Engineering

TOGOUON Lead CRM

TOGOUON Lead CRM is a customer relationship management platform designed to help small businesses organize leads, track follow ups, manage customer conversations, and centralize opportunities coming from multiple channels.

The platform was created from a real operational need: customers can contact a business through phone, email, Messenger, WhatsApp, social media, website forms, or in person conversations. Without a central system, important opportunities can easily be forgotten.

Designed the full CRM workflow from lead capture to lead follow up
Built lead list, detail view, status tracking, pipeline view, and customer activity concepts
Created a user interface designed for both mobile and desktop usage
Planned reporting logic for lead status, follow up visibility, and business performance
Designed provider based architecture for future Google, Microsoft, and external service integrations
Improved the system through iterative testing, UI correction, workflow refinement, and real usage scenarios

Stack: JavaScript, HTML, CSS, API Design, CRM Logic, Workflow Automation, SaaS Architecture

View TOGOUON Lead CRM

Public view shows the product concept and business value. Source code, provider routing, database structure, security flow, and internal implementation remain confidential.

Internal Platform / SaaS Administration / Multi Tenant Architecture

TOGOUON Admin Platform

TOGOUON Admin Platform is the internal administration layer designed to manage customer onboarding, workspace activation, license status, provider configuration, platform health checks, and operational readiness for the CRM ecosystem.

A customer facing CRM requires an operational control center behind it. This admin platform was designed to support that need by making customer setup, installation status, system validation, and future tenant management easier to monitor and control.

Designed customer setup flow concepts including setup link, setup key, password creation, plan selection, and activation status
Structured tenant workspace logic so each customer can have a separated operational environment
Planned license and plan enforcement logic for future subscription based access
Designed provider health checks for Google, Microsoft, and future integration readiness
Created admin dashboard concepts for customer status, installation completion, workspace health, and system audit
Prepared the foundation for cloud sync, offline sync, production readiness checks, and migration support

Stack: JavaScript, HTML, CSS, API Architecture, Multi Tenant Design, SaaS Administration, System Health Logic

This platform is internal and not publicly linked. Security mechanisms, provisioning workflows, customer controls, and operational logic are intentionally protected.

Additional Featured Technical Projects

These projects demonstrate software design, frontend logic, backend planning, API architecture, workflow automation, cloud readiness, and maintainable engineering decisions.

Frontend Engineering / Browser Tool / Educational Technology

Interactive DOM Editor And Educational Web Builder

Designed and developed a browser based editing tool that allows users to visually manipulate web page elements, modify content, replace images, reorganize DOM structures, sign their work, and export the result as an HTML file or PDF.

The project was inspired by CMS concepts and designed as a learning tool to help students, teachers, and non technical users understand how web pages are structured and how frontend elements interact.

Built interactive DOM manipulation features for moving, editing, and replacing page elements
Implemented export workflows for customized pages as index.html and PDF documents
Designed a signing workflow so completed work could be submitted, reviewed, or validated
Created the concept as an educational bridge between content management systems and frontend development
Focused on usability for students, educators, and non technical users

Stack: JavaScript, HTML, CSS, DOM APIs, Browser Extension Logic, Frontend Architecture

Source code and internal implementation details are not public because the project is intended for controlled packaging and future deployment.

Cloud Architecture / Educational Platform / Full Stack Planning

MOWFAA Modular Learning Platform

Designed the foundation for a modular educational platform where each learning lab can operate independently while sharing the same parent account, child profile, access rules, and reporting structure.

Designed parent account and child profile structures
Created MongoDB schema concepts for labs, subscriptions, access control, and modular activation
Planned API first architecture for future cloud deployment
Designed modular lab access where the Base Lab remains always included
Prepared the system for beta testing, invited users, and future paid lab activation

Stack: MongoDB, REST APIs, Cloud Architecture, Full Stack Design, SaaS Planning

Screenshots and sensitive product logic are limited because the platform is not yet publicly released.

Frontend / E Commerce Engineering

Shopify Dynamic Personalization System

Built and customized product workflows for personalized digital and print products, including conditional fields, variant based behavior, customer input validation, and dynamic user guidance.

Implemented dynamic product form behavior based on selected product variants
Used custom Liquid, JavaScript, HTML, and CSS instead of paid application dependencies
Created personalization logic for standard, name only, and full custom product options
Improved user experience with contextual instructions and required field behavior
Supported multilingual and e commerce product workflows

Stack: Shopify Liquid, JavaScript, HTML, CSS, UX Logic, E Commerce Workflows

Business Application / Customer Workflow Automation

Customer Service Reporting And File Access Workflow

Designed structured customer workflows for service reporting, secure file sharing, before and after image review, and customer communication using a combination of web tools and hosted file access.

Designed customer report workflows with controlled file access
Structured before and after service documentation for customer review
Integrated hosted file sharing concepts with customer communication workflows
Planned centralized customer database, invoice, and service tracking architecture

Stack: PHP, Nextcloud, Workflow Design, Customer Systems, File Access Logic

Engineering Style

I do not only write isolated features. I look at the full user journey, the data flow, the operational workflow, the future maintenance cost, and the way the system will be used in real conditions. My goal is always to build software that is useful, clear, maintainable, and ready to evolve.

Enterprise And Professional Development Experience

In addition to independent technical projects, I have contributed to enterprise software environments, CMS platforms, cloud based systems, APIs, and Agile delivery teams.

Vision33 | Saltbox Low Code Integration Platform

Contributed as a Full Stack Developer and DevOps Engineer in a fully remote Agile environment, supporting a cloud based low code integration platform.

Worked with Angular and AWS based platform development
Built and maintained REST API integrations
Supported CI/CD workflows, reliability, and cloud infrastructure practices
Improved performance, maintainability, and production readiness

Stack: Angular, AWS, REST APIs, CI/CD, Agile Scrum, DevOps

Avanade Deutschland GmbH | Enterprise Web Applications And CMS Solutions

Worked on enterprise software projects across insurance, healthcare, chemicals, and IT environments, contributing to web applications, CMS solutions, APIs, and scalable systems.

Developed enterprise web applications and RESTful APIs
Worked with Sitecore CMS, Angular, React integration concepts, and cloud based delivery practices
Collaborated with business and technical teams to translate requirements into software solutions
Supported CI/CD pipelines, deployment workflows, and system maintainability

Stack: .NET, Sitecore, Angular, React, REST APIs, Azure DevOps, CI/CD

ecx.io, An IBM Company | Sitecore CMS And Multilingual Web Systems

Developed multilingual enterprise CMS solutions and custom web components for client facing digital platforms.

Built custom Sitecore modules and frontend interfaces
Supported migration from legacy systems to modern CMS environments
Performed testing, debugging, and cross browser optimization
Contributed to Agile delivery for enterprise web projects

Stack: Sitecore CMS, .NET, JavaScript, HTML, CSS, Enterprise Web Development

University Of Wuppertal | Scientific Software And Research Tools

Developed scientific software tools, data analysis workflows, GUI components, and computational support systems for electromagnetic research.

Built GUI and client server communication features
Worked with Python, C++, MATLAB, and Visual Basic
Contributed to research software published in a scientific journal

Stack: Python, C++, MATLAB, Visual Basic, GUI Development, Scientific Computing

Technical Skills

Frontend

React, Angular, TypeScript, JavaScript, HTML5, CSS3, DOM APIs, Shopify Liquid, Responsive UI

Backend

.NET Core, C#, REST APIs, PHP, Microservices, API Integration, Business Logic

Cloud And DevOps

AWS, Azure, Docker, CI/CD, Azure DevOps, Git, Remote Agile Delivery

Databases And Systems

MongoDB, SQL Server, PostgreSQL, NoSQL, System Design, Data Modeling

How I Work

I approach software development with a practical engineering mindset. I clarify the problem, design the workflow, structure the data, build the interface, connect the logic, test the behavior, and improve the system through real feedback.

I am comfortable working across frontend, backend, cloud planning, CMS customization, API integration, data modeling, debugging, documentation, and production readiness.

For confidential or proprietary work, I present project scope, responsibilities, technologies, and outcomes without exposing private source code, private infrastructure, security logic, or client owned intellectual property.

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