SignBulb From Valcare’s Vision→to Perigeon’s Engineering

A cloud-native, containerized, mobile-first eSignature SaaS product engineered entirely by Perigeon for Valcare Systems

Product Origin & Vision

SignBulB was the brain-child idea of Valcare Systems leadership — a bold vision to build a global, secure, scalable eSignature SaaS platform to eliminate manual signing friction in digital workflows.

When Valcare came to Perigeon:

They had no in-house technical or software engineering team

There was no legacy codebase
or platform

There was only a product idea and ambition

Perigeon supported them as an end-to-end product engineering and outsourcing partner, providing architecture, cloud infrastructure, development, deployment, security, monitoring, Agile discipline, payments, mobile apps, and QA orchestration.

SignBulB Product Capabilities (Engineered by Perigeon)

Web App eSignature

A secure, scalable eSignature platform designed to manage end-to-end signing workflows with precision, efficiency, and full compliance across multi-tenant, cloud-native environments.

Envelope creation with lifecycle tracking

Real-time status and audit visibility

Secure access with encrypted storage

Mobile eSign Experience

A seamless on-the-go signing solution built in Flutter, offering responsive performance, offline continuity, and optimized user experience for iOS and Android devices.

Streamlined previews from cloud storage

Fast signing with offline caching

Native payments with Stripe APIs

Cloud-Native Infrastructure

A robust, high-performance cloud environment engineered with containerization, observability, and zero-downtime deployment for reliable, scalable, and compliant signing operations.

Dockerized services with AKS scaling

Enforced isolation at service layer

Automated deployments with resilience

Core Challenges at Kickoff

Perigeon’s Engineering & DevOps Solution

Perigeon engineered SignBulB using the following Microsoft + DevOps stack:

Tech	Purpose
.NET Core Web App	Core signing backend
Azure SQL Database	Encrypted metadata (users, envelopes, recipients, signature fields, audit logs)
Azure Blob Storage (via Azure Storage)	Uploaded documents, signing payloads, signed outputs
Azure Storage	Asset retention & encryption
Application Insights	Real-time logs, tracing, uptime, failures, dependency calls
Docker	Containerized microservices
Kubernetes (AKS – Azure Kubernetes Service)	Orchestration, auto-scaling, deployment resiliency
Stripe API	Payment gateway, subscription billing, wallet credits
Flutter Mobile App	iOS + Android signing UI, offline signer continuity

Cloud-Native, Containerized Platform

Perigeon engineered SignBulB for Valcare from a standalone vision into a cloud-native eSignature SaaS product using .NET Core, Azure SQL, Azure Blob & Storage, Docker containers, Kubernetes orchestration on Azure AKS (HPA-enabled), Stripe API billing, Flutter mobile apps (iOS/Android with offline signing continuity), Agile sprint-based delivery, encrypted audit trails, and HIPAA-aligned secure code principles.

Key Architecture
Highlights

Backend services Docker-containerized

Deployed on AKS Kubernetes clusters

Used Horizontal Pod Autoscaling for signing workloads

Zero-downtime deployments

File storage via Azure Blob Containers

Dependency tracing + API mapping via Application Insights

Billing automation via Stripe webhooks + credit unlock

Offline-capable signing sessions via mobile caching layer in Flutter

Compliance-Driven Secure Code

✔ All APIs HTTPS enforced

✔ Database and document encryption at-rest and in-transit

✔ RBAC and tenant-isolated access

✔ Secure token-based signer authentication

✔ Zero PHI leaks in logs

✔ Key retention and secrets stored securely in Azure infra

✔ Container-network isolation policies

✔ Zero-trust workload execution principles.

QA & Product Quality Discipline Followed

QA Principles & Activities

Perigeon ensured product reliability and stability through a structured QA discipline focused on platform resilience, data integrity, and frictionless user workflows.

QA Process Followed

Comprehensive QA Plan created before development handoff to define test scope, risks, and acceptance criteria.

Full test coverage across critical components:

.NET signing APIs

Stripe billing workflows

Blob Storage document retrievals

User authentication and permission scopes

Envelope → recipient → field signing flows

Mobile signing continuity (iOS + Android)

Platform reliability validation including availability checks, failure simulations, and dependency graph tracing using Application Insights.

Hybrid testing cycles with manual + automated signing tests across web and mobile.

End-to-end UAT completed on the Flutter app to ensure smooth signing experience for all user roles.

Security-focused QA confirming signature integrity, document protection, and vulnerability-free signing flows.

Key QA Outcomes

No workflow breaks post launch

Multi-signer signing session accuracy verified

Billing + wallet activation automated and tested via Stripe

Document storage and retrieval validated from Blob

Container workloads stability validated in AKS clusters

Perigeon followed a true Agile delivery methodology throughout the product engineering lifecycle:

Requirements broken into user-story driven backlog items

Continuous backlog grooming with Valcare stakeholders

Incremental, confidence-fed feature delivery

Engineering demos + feedback loops (Dev → QA → UAT → Prod readiness)

Course corrections validated early via working UI, signing ergonomics, and dependency safety

No big-bang rollout, ensuring product stability and governance scalability from day one

Why this matters here:

Valcare had no in-house tech team, so Perigeon guided them through structured Agile ceremonies while engineering and validating the product incrementally.

Security & HIPAA-Compliant Engineering Standards

Although SignBulB does not use Salesforce, it fully adheres to Microsoft Azure secure coding practices and maintains a compliance-ready architecture. Wherever applicable, the platform aligns with HIPAA-compliant engineering principles to ensure data integrity, confidentiality, and secure operations.

Core Security Measures

Encrypted database storage (Azure SQL)

Blob and document encryption at rest and in transit

Role-Based Access Control (RBAC) for granular access management

Secure key retention using Azure Key Vault

No PHI exposure in logs through strict logging discipline

Infrastructure-level encryption via Azure Storage and Application Insights

Dependency tracing without sensitive payloads

Microservice isolation using Docker and Kubernetes (AKS private clusters)

Secure Coding Principles Applied

All APIs enforce HTTPS end-to-end

User authentication tokens securely stored and managed

PHI access protected through server-side validations and controlled access logic

Signing and audit data stored in isolated tenant environments

Container-level network policies prevent unauthorized cross-communication

Zero-trust execution model applied across workloads

Reliability & Business Impact Summary

Signing speed

0 %

68% faster document signing cycles

Platform uptime

0 %

99.3% uptime via Application Insights

Sign completion

0 %

52% higher signing completion rate

Collaboration

Multi-signer envelopes processed accurately

Mobile adoption

Launched Swift mobile app on iOS + Android using Flutter

Billing continuity

Stripe API enabled for all plan payments & credit unlock

Security

Fully encrypted and secured code principles applied

Valcare envisioned. Periegeon engineered & secured. SignBulB launched — a containerized, mobile-first, Microsoft-native eSignature SaaS success.

SignBulb Mobile App

Fast, Compliant, and Always Accessible

SignBulb’s mobile app lets users sign, send, and track documents anytime—perfect for professionals on the move.

Key Capabilities

Optimized for iOS and Android

Secure and compliant e-signature workflows

Intuitive and easy-to-use mobile interface

Access documents anywhere, on any device

Real-time notifications for sign requests

Frequently asked questions

What is SignBulb used for?

Yes, The QA process verified call actions across Leads, Contacts, Accounts, and Opportunities, which appear in multiple Salesforce Clouds. Since the integration relies on Salesforce CTI and standard APIs—not cloud-specific features—it is compatible with all major Salesforce Clouds where these objects and CTI are supported.

Is SignBulb secure for legal documents?

No.
Agents can make calls using Click-to-Dial inside Salesforce and track all call activities directly from Salesforce. The integration eliminates app-switching and allows agents to perform all CallHippo actions within Salesforce.

Does SignBulb work on mobile devices?

Yes.
The system automatically synchronizes contacts and activities in real time between Salesforce and CallHippo, ensuring agents always have up-to-date information.

What industries use SignBulb?

Yes.
The solution supports automated workflows, configurable triggers, custom actions, and integration testing aligned with each client’s business processes. The Agile approach ensured iterative customization throughout the project.

Can multiple people sign the same document?

Yes.
The features described—Click-to-Dial, activity logging, CTI integration, real-time sync—are all Lightning-compatible. The QA process validated functionality across Salesforce modules, which indicates Lightning Experience support.

Looking to Modernize Your E-Signature & Document Automation Platform?

Perigeon helps forward-thinking businesses like SignBulb build secure, scalable, and high-performance e-signature ecosystems. From seamless signing experiences to automated document workflows, we engineer platforms that are reliable, compliant, and future-ready.