Jan 2021 – Dec 2021

Secure Financial API Integration Platform (KYC & Identity)

The ID Register · Backend Consultant

5+

API Integrations

1

Year on Project

100%

Compliance Ready

0

Security Incidents

Growth & Stability

~60%

API Response Time Reduced

30+

Manual Workflows Eliminated

1000s

Real-time Synced Users

Overview

At The ID Register, a financial security company providing KYC and authentication services for investors and fund managers, I worked as a backend consultant to integrate secure third-party financial APIs into their platform. The focus was on secure identity, authentication, and compliance-driven integrations.

The Problem

Complex third-party API integrations with inconsistent standards

Strict security and compliance requirements (KYC, identity verification)

Need for secure authentication and authorization flows

Risk of unreliable or insecure data exchange between systems

Challenges in managing identity across systems

The Solution

Built backend services for secure API communication using C#

Implemented OAuth-based authentication flows

Integrated Microsoft Entra ID for identity and access management

Designed OpenAPI-based contracts for consistent integrations

Ensured secure handling of sensitive financial and identity data

Architecture

Core Components

Secure API integration layerOAuth-based authentication and authorizationMicrosoft Entra ID identity managementOpenAPI specification contracts

Technical Design

Secure API integration layer (C# backend)
OAuth-based authentication and authorization
Microsoft Entra ID for identity management
OpenAPI specifications for standardized API contracts
Azure App Services / APIs
Azure Active Directory (Microsoft Entra ID)
Azure DevOps for CI/CD and deployment

My Role: Backend Consultant

01

Integrated multiple third-party financial APIs

02

Designed secure API communication using OAuth and OpenAPI

03

Implemented identity and access flows using Microsoft Entra ID

04

Ensured secure handling of KYC and financial data

05

Contributed to frontend integration using React where needed

06

Supported deployment and integration workflows via Azure DevOps

Key Achievements

🔥

Built secure integration layer for financial and identity services

🔥

Standardized API communication using OpenAPI contracts

🔥

Implemented robust authentication flows using OAuth + Entra ID

🔥

Reduced integration complexity for external financial providers

🔥

Ensured compliance-ready architecture for sensitive data handling

Impact

📊

Enabled secure and scalable integration with financial service providers

📊

Improved reliability and consistency of API interactions

📊

Strengthened platform security for KYC and authentication workflows

📊

Reduced risk in handling sensitive investor data

📊

Accelerated onboarding of new integrations through standardization

Tech Stack

Backend

C# (.NET), REST APIs

Frontend

React (integration support)

Cloud

Azure

Identity

Microsoft Entra ID (Azure AD), OAuth

API Design

OpenAPI

DevOps

Azure DevOps

What I Help With

Scalable Backend Systems

High-performance APIs and microservices

Complex Integrations

Stripe, Shopify, Microsoft Graph, telecom

AI & Automation

LLM workflows, document processing

Identity & Security

OAuth, Entra ID, Cognito

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