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BigTree108

Full-stack development services

Full-stack development services for e-commerce, SaaS, fintech and healthcare: web applications, marketplaces, customer portals and back offices built from database to browser on MERN, MEAN, Next.js, .NET, Laravel, Django, Spring Boot or Ruby on Rails, with dedicated full-stack developers for your team or a project delivered end to end.

What our full-stack developers build

  • MERN, MEAN and Next.js stacks

    Node.js with Express or NestJS behind React, Angular, Vue or Next.js, on MongoDB or PostgreSQL through Prisma or Drizzle. Input is validated with Zod at every endpoint, and a React Native app can reuse the same API client when the product also needs one.

  • .NET with Angular, React or Blazor

    ASP.NET Core on .NET 10 with Entity Framework Core and SQL Server or PostgreSQL, behind Angular, React or Blazor front ends and hosted on Azure, AWS or in containers. It is the largest practice in our company.

  • PHP back ends with JavaScript front ends

    Laravel or Symfony with API Platform serving a Vue, Nuxt, React or Next.js front end, with sign-in through Laravel Sanctum or OAuth, on MySQL or PostgreSQL with queues on Redis.

  • Django and FastAPI with React or Vue

    Python backends on Django with Django REST Framework or on FastAPI with SQLAlchemy and Pydantic, behind React or Vue, or HTMX when the screens are mostly forms. Data processing and AI features live in the same language as the API.

  • Spring Boot with Angular or React

    Java or Kotlin services on Spring Boot with Spring Data JPA, Spring Security and Flyway migrations behind Angular or React, the pairing common in banking, insurance and large enterprise systems.

  • Ruby on Rails with Hotwire

    Rails 8 applications with Turbo and Stimulus for fast server-rendered screens, or a React front end on a Rails API, with background jobs on Solid Queue or Sidekiq.

  • Serverless and backend-as-a-service stacks

    Next.js or Nuxt on Vercel, Netlify or Cloudflare with Supabase or Firebase behind them, with row-level security policies or Firebase Security Rules written and tested rather than left at the defaults, for products that need little operations work.

  • Marketplaces and booking platforms

    Custom platforms for services, rentals and bookings: availability calendars and time-slot reservations, identity checks for providers, payments held until the job is done, search with map and distance filters, and reviews, messaging and disputes.

  • Full-stack work on an existing product

    New features across every layer of a product another team started, after a read-only review of the code, the dependencies and the pipeline and a written list of risks.

Hire full-stack developers

  • Dedicated full-stack developers

    Full-stack developers who join your team full time, work in your tools and process, and report to your lead. You interview them; we carry the Ukrainian contract, payroll, invoicing and leave.

  • Full-stack development projects

    A defined piece of full-stack development with a scope, a fixed plan and a named lead on our side who owns the result and reports progress in your channels.

  • Ongoing full-stack development

    Full-stack development as a continuing service: the same people every month, a backlog you prioritise, and hours you can see in our portal and on the invoice.

The dedicated team page explains how specialists join your team, and the outsourcing page covers project delivery, take-overs and how we charge.

Who works on your full-stack development

  • Full-stack developers

    Node.js, .NET, PHP, Python, Java or Ruby with React, Angular or Vue

  • UI and UX designers

    Figma design systems and prototypes

  • QA engineers

    Manual testing and Playwright automation

  • DevOps engineers

    Terraform, pipelines, hosting and monitoring

  • Mobile engineers

    React Native, iOS and .NET MAUI apps on the same API

How our full-stack developers work

A feature ships as one change: the migration, the endpoint, the screen and the tests, reviewed and released together. The contract between the layers is typed, through shared schemas in a TypeScript stack or a client generated from the backend’s OpenAPI document in the others, the build ends with zero warnings, and Playwright journeys run before every release.

Infrastructure is code from the first week: Terraform for the cloud resources, GitHub Actions with federated credentials instead of stored keys, and logs and alerts in place before the first user signs in. Our own company runs on a platform built this way, on .NET, Angular and Azure.

Other specialised development we provide

Specialised development overview

Questions about full-stack development

Which stacks do your full-stack developers work in?

Node.js with React, Angular, Vue or Next.js (the MERN, MEAN and MEVN stacks), C# and ASP.NET Core with Angular, React or Blazor, PHP with Laravel or Symfony, Python with Django or FastAPI, Java or Kotlin with Spring Boot, Ruby on Rails, and serverless stacks on Supabase or Firebase. We work in the stack your product already runs, and for a new product we choose the stack with you.

Which industries do your full-stack developers work in?

Most often e-commerce and marketplaces (storefronts, seller tools and order management), SaaS and enterprise software (B2B products, ERP portals and back offices), fintech, banking and insurance (customer onboarding, portals and internal tools), and healthcare and wellbeing (booking, patient portals and telehealth). They also build analytics and AI products, marketing technology, media and consumer apps, education platforms and logistics systems.

Full-stack developers or separate front-end and backend specialists?

Full-stack developers when the product is a web application and the team is small, because one person can carry a feature from the database to the screen. Specialists when one layer is deep enough to need its own: complex domain logic, heavy data work or a design system shared across products. Many teams mix both, and we will suggest the split for yours.

How quickly can full-stack developers start?

When the right full-stack developer is available, the start is gated only by your interview and the NDA and IP assignment. Otherwise we run a search, which typically produces candidate profiles within two to three weeks, and nobody starts until you have said yes.

How do we hire full-stack developers through BigTree108?

Tell us the work, the seniority and the hours you need. We propose one or two people with their profiles, you interview them the way you would interview your own hire, and you sign one agreement with BIG TREE 108 LLC and receive one invoice a month.

Who owns the work they produce?

You do. Every specialist has a signed contract with BigTree108 that assigns all work product to the company, and our agreement with you assigns it onward. Code, designs and documents are delivered into your own repositories and tools, not kept where only we can change them.

Building a web application?

Tell us what it does, who uses it and what it runs on today. You get an answer within one business day: a plan, candidate profiles, or a review of the existing code.

Email hello@bigtree108.com How we respond