How long does a typical project take?

Timelines vary by scope. A small web app takes 4-8 weeks, a medium full-stack project 2-4 months, and enterprise-grade systems 4-8 months. As a freelance developer, I provide a detailed timeline during the Discovery phase and keep you updated at every sprint.

Do you work with startups or only enterprises?

I work with everyone — from early-stage startups building their MVP to established enterprises modernizing their systems. As a freelance developer, my flexible engagement models adapt to your needs and budget. I'm especially passionate about helping startups launch their first product.

What happens after the project is launched?

Every project includes post-launch support (duration depends on the scope). I handle bug fixes, monitoring, and minor updates. For ongoing needs, I offer freelance retainer packages and dedicated hourly/monthly arrangements.

How do you ensure code quality?

Every line of code goes through peer code reviews, automated testing (unit + integration), linting, and security scans. I follow clean architecture principles and industry best practices. As a freelance developer, my reputation depends on the quality I deliver.

Can you work with our existing team?

Absolutely. I offer staff augmentation, pair programming, and consulting models where I integrate directly with your team. I adapt to your tools, processes, and communication channels. Many clients hire me as a freelance extension of their in-house team.

What technologies do you use?

I specialize in Java, Spring Boot, React, Next.js, TypeScript, PostgreSQL, Redis, Docker, Kubernetes, and Kafka. But I choose technologies based on what's best for your specific project, not one-size-fits-all.

How do I hire you as a freelance developer?

Simply reach out via the contact form or email. We'll start with a free 30-minute consultation to understand your project. I'll then provide a detailed proposal with timeline, cost, and approach. You can hire me for fixed-price projects or on an hourly/monthly basis.

What are your freelance rates?

Every project is unique, so I provide custom quotes based on scope, complexity, and timeline. I offer competitive freelance rates for startups and businesses of all sizes. Contact me for a free estimate — no obligation.

Do you offer ongoing freelance support and maintenance?

Yes! I offer flexible freelance retainer packages for ongoing development, maintenance, monitoring, and feature additions. Many of my clients maintain long-term freelance relationships for continuous product evolution.

Do you sign Non-Disclosure Agreements (NDA) and transfer IP rights?

Yes, 100%. I sign a strict NDA before discussing sensitive project details. Upon full payment, 100% of the intellectual property (IP) rights, source code, design files, and deployment assets belong entirely to you.

About Me

THE DEVELOPER
BEHIND THE CODE

I'm Gianni Vilayhane, a freelance software engineer and full-stack developer specializing in enterprise integrations, automation, AI-powered platforms, and scalable web applications. I build secure, production-ready systems that connect complex technologies and solve real business problems. Available for hire worldwide.

My Story

BUILDING SOFTWARE
THAT MATTERS

My experience building production software has taught me that businesses rarely need just another developer. They need an engineer who understands how applications, APIs, databases, integrations, authentication, automation, and business workflows fit together.

I work as a freelance full-stack engineer, helping businesses build reliable SaaS products, business applications, and integrations. I work across TypeScript, Node.js, NestJS, PHP, Laravel, Python, FastAPI, React, Next.js, PostgreSQL, MySQL, Redis, REST APIs, webhooks, background jobs, and event-driven architectures.

My sweet spot is building software at the intersection of full-stack development, SaaS, enterprise integrations, automation, and AI. I've worked with platforms such as Salesforce/Litify, Zendesk, Filevine, payment providers, CRMs, and other third-party systems, while also building AI agents and multi-step AI workflows with persistent context, tool execution, and API integrations.

Whether you're launching a new SaaS product, connecting business systems, automating operational workflows, integrating AI, or improving an existing platform, I bring an end-to-end engineering mindset focused on clean architecture, reliability, maintainability, and software that delivers real business value.

Journey

2019

Software Engineering

Started building production web applications and SaaS products, developing a strong foundation in frontend development, backend systems, APIs, databases, and software architecture.

2020

Full-Stack Development

Expanded into full-stack engineering, working across JavaScript, TypeScript, PHP, Node.js, React, databases, REST APIs, and reusable application components.

2021

SaaS & API Integrations

Focused on building SaaS applications and connecting business systems through REST APIs, webhooks, authentication, and custom integrations.

2022

Business Automation

Worked directly with clients and business teams to automate operational workflows across payments, e-commerce, marketplaces, healthcare, legal, logistics, and professional services.

2023

AI & Intelligent Workflows

Expanded into AI-powered applications, building AI agents and multi-step workflows with tool execution, persistent context, API integrations, and business automation.

2024

AI Platform Engineering

Joined Eden Labs and contributed to a large-scale AI platform, working across Next.js, backend services, AI orchestration, multimodal generation, custom model training, and scalable platform architecture.

2025

Enterprise Integrations

Expanded into enterprise integration and project coordination, working with platforms such as Salesforce Litify, Zendesk, and Filevine while translating business requirements into technical deliverables.

2026

Scalable AI & SaaS Systems

Continuing to build enterprise-grade SaaS, AI, integration, and automation systems with a focus on multi-tenant architecture, reliable APIs, event-driven workflows, payments, and scalable business platforms.

Values

WHAT I STAND FOR

Security First

Every system I build is hardened from the ground up — authentication, authorization, encryption, and audit logging are non-negotiable.

Performance Driven

I optimize for speed at every layer — from database queries to API response times to frontend rendering. Milliseconds matter.

User Centred

Technology serves people. I design interfaces that feel intuitive and natural — because the best software is invisible.

Clean Code

I write code that other developers can read, maintain, and extend. Clean architecture, SOLID principles, and comprehensive testing.

Achievements

I TAKE PRIDE IN
MY ACCOMPLISHMENTS

Key milestones and measurable outcomes from my engineering career.

50+Projects Completed

8+Years Experience

30+Technologies Mastered

100+REST APIs Designed

Client Delivery

From Idea to Live Product — End to End

Built and shipped production-ready platforms like Eden, a multi-modal generative AI platform for autonomous agents and image, video, and audio workflows, and Keepcoming, a multi-tenant loyalty platform with live Apple Wallet and Google Wallet integration, taking projects from architecture and development through deployment.

Full-Stack Range

30+ Technologies, One Trusted Developer

React, Next.js, Node.js, Python, FastAPI, Laravel, Spring Boot, PostgreSQL, Docker, AWS, and GCP, I choose the right technologies for each project. From frontend experiences and backend APIs to authentication, integrations, cloud infrastructure, and deployment, I work across the full stack.

Real Impact

APIs & Integrations Powering Business Workflows

Design and build production APIs that connect applications, business systems, and third-party platforms. From REST APIs and webhooks to OAuth, data synchronization, middleware, and event-driven workflows, I build integrations that automate real business processes and keep critical systems connected.

LET'S BUILD TOGETHER

Whether you have a clear vision or just a rough idea, I'm here to make it happen.

THE DEVELOPERBEHIND THE CODE

BUILDING SOFTWARETHAT MATTERS