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The systems, and how they were built.

Two write-ups so far. Each one covers the actual architecture — constraints, decisions, tradeoffs, and what we’d change. Not a screenshot and a paragraph.

Then the four systems we built end to end for TTouch Clothing, all four live. Then the features we shipped into other companies’ apps. Below them: the other products we built, for clients and for ourselves, and what our engineers shipped at previous employers. Every card says who built it.

Case studies

  • Case study: built by Bolt Fusion for WarmChats, Inc.

    WarmChats

    Always-first AI follow-up for real estate agents: Claude qualifies and routes every new lead, GPT-4.1 replies on email and SMS, and bookings write straight to the calendar.

    What we built
    Backend lead: the Django CRM core, NestJS and Flask services, Telnyx voice and SMS, and Claude for the messaging
    Status
    Live
    • <60stargetFirst reply to every inbound lead
    • Claude
    • GPT-4.1
    • Microservices

    Read the write-up for WarmChats

  • Case study: built by Bolt Fusion

    Intelligent restaurant search

    Conversational discovery with explicit routing, predictable AI unit economics, and latency targets suitable for high-volume production traffic.

    What we built
    The multi-tenant restaurant discovery microservice
    • <100msshippedSearch response, 80% of traffictarget
    • ~$0.001targetAverage cost per AI query
    • ~90%shippedOf AI calls routed to Haiku, not a frontier model
    • NestJS
    • PostGIS
    • pgvector
    • Redis

    Read the write-up for Intelligent restaurant search

Client story

Four systems for TTouch Clothing

TTouch Clothing is a fashion brand from Bangladesh. We built four of its systems end to end — design, apps, backends and databases: a courier-risk web app for online sellers, a wholesale portal, the Sudarshini saree store, and employee verification with its HR back office. All four are live.

  • Delivery Lens BD's homepage: “Know Your Customer Before You Ship.”, beside the product's demo card showing a delivery score and a courier-by-courier breakdown

    Delivered project: built by Bolt Fusion for TTouch Clothing

    Delivery Lens BD

    A subscription web app for online sellers in Bangladesh: enter a customer's mobile number, and it checks their delivery record across several couriers and rates the risk before the order ships. It also runs bulk checks and has a developer API.

    What we built
    The whole build: design, the web app, subscriptions, the developer API, the admin console and the database
    Status
    Live
    • Next.js
    • Node.js
  • TTouch Wholesale's public catalogue: “Wholesale products with approval-based access.”, the product search, and catalogue cards that show a See Price button instead of a price

    Delivered project: built by Bolt Fusion for TTouch Clothing

    TTouch Wholesale

    A wholesale portal for TTouch Clothing: shops register, and once approved they browse the catalogue and see trade prices, while the back office runs quotations, sales memos, supplier stock and accounts, and the pricing rules.

    What we built
    The whole build: design, the customer portal, the admin back office, the API and the database
    Status
    Live
    • React
    • Django
    • REST
  • The Sudarshini store's admin sign-in page: “Welcome back”, “Sign in to manage products, banners, menus, orders, and admins.”, the email and password fields and the Login button

    Delivered project: built by Bolt Fusion for TTouch Clothing

    Sudarshini

    The online store of Sudarshini, TTouch Clothing's saree brand: shoppable product videos, shopping by design code or by fabric, cash-on-delivery checkout, and an admin for products, orders, delivery charges and seasonal themes.

    What we built
    The whole build: design, the storefront, the admin, the API and the database
    Status
    Live
    • React
    • Node.js
  • TTouch Clothing's employee verification page with nothing entered: the employee ID and date-of-birth form, an empty result panel and the privacy note

    Delivered project: built by Bolt Fusion for TTouch Clothing

    TTouch Employee Verification

    A public page where anyone can check that a person really works at TTouch Clothing, and a back office where HR keeps staff records and departments, with an audit log of every check.

    What we built
    The whole build: design, the verification page, the HR back office, the API and the database
    Status
    Live
    • React
    • Node.js

Feature work

Features we shipped into other companies’ apps

Features we built inside apps other companies own. The apps are theirs: each card names the company and only the features that were ours.

    • Bazzile's swipe browsing, from its App Store screenshots: a listing card over the map, with dismiss and like buttons beneath it — a feature Bolt Fusion built
      Swipe-based browsing
    • Bazzile's map, from its App Store screenshots: listings pinned by price across Paris, with the matched listing's card below — the Google Maps location matching Bolt Fusion built
      Google Maps location matching

    Delivered project: features built by Bolt Fusion for Bazzile Technology SA

    Bazzile

    A Swiss real-estate marketplace app based in Geneva: listings come only from professional agencies, are ranked by an AI matching model, and sync with most agency CRMs.

    100K+ downloads on Google Play (opens in a new tab)

    The whole app’s install count on its Google Play listing — its reach, not a measure of our features. Read 30 September 2026.

    What we built
    Features in the React Native app: swipe-based browsing, Google Maps location matching and Firebase real-time sync
    Status
    Live
    When
    Jan 2025 – Jul 2025
    • React Native
    • Firebase
    • Redux-Saga
    • Reanimated
    • NestJS

Bolt Fusion projects

  • FanLock's live homepage: the “Everything You Need to Fight Leaks” section and the first of its feature cards

    Delivered project: built by Bolt Fusion

    FanLock

    A content-protection platform for online creators that scans Telegram, Google and social media for leaked content and automates takedowns.

    What we built
    Backend lead
    Status
    Live
    • Next.js
    • Django
  • Balanzify's live migration page: “Your data. Fully migrated. In one afternoon.”, with Balanzify's own marketing figures below it

    Delivered project: built by Bolt Fusion for Balanzify Inc.

    Balanzify

    An HR and payroll platform, built as NestJS microservices that all speak GraphQL.

    What we built
    The platform's microservices: onboarding, payslips, attendance, tax logic and leave management
    Status
    In production
    When
    Jul 2025 – ongoing
    • NestJS
    • PostgreSQL
    • GraphQL
    • Microservices
  • The Go Style Business sign-in page at business.gostyle.uk, the product's only public page

    Delivered project: built by Bolt Fusion

    Go Style Business

    A salon business management platform, in production serving real salons.

    What we built
    Backend lead: a multi-tenant NestJS and Prisma backend on PostgreSQL, deployed on Docker Swarm
    Status
    In production
    • NestJS
    • Prisma
    • PostgreSQL
    • Docker Swarm

In-house products

  • OPAL's live shop page: “The collection”, its category list and the first products in the catalogue

    In-house product: our own, not built for a client

    OPAL

    A curated fashion and tech e-commerce store.

    What we built
    Co-founded and built it: catalogue, cart, secure checkout and order tracking
    Status
    Live
    • Next.js
    • Firebase
    • Firestore

Our engineers’ track record

Work our engineers shipped at previous employers — credited to them, not claimed as ours.

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