APIs, services, architecture
Backend Systems
Secure REST APIs, background services, Azure Functions, authorization flows, token management, and clean service boundaries.
ASP.NET Core Web APIMicroservicesJWTRBAC
Backend-focused full-stack .NET developer
I build backend systems, APIs, integrations, and workflow automation that businesses can trust.
I am Parth Suthar, a backend-focused full-stack developer with 3+ years of experience across secure REST APIs, Azure Functions, SQL-heavy systems, accounting integrations, reporting automation, Angular interfaces, and AI-assisted business workflows.
Experience
3+ years
Core stack
.NET / SQL / Angular
Integrations
QBO / Sage / Xero
Experiments
AI + BI workflows
C#ASP.NET CoreAzure FunctionsSQL ServerRBACOAuth 2.0AngularCloudflare Pages
Capabilities
Backend depth with product-shaped delivery.
The work sits where secure APIs, durable data flows, accounting integrations, and practical automation meet.
Performance and reporting
Data & SQL
SQL Server and MySQL work across stored procedures, query optimization, indexing, dynamic SQL, OPENJSON, Redis cache, and reporting pipelines.
SQL ServerMySQLStored ProceduresRedis
Accounting and workflow sync
Integrations
OAuth 2.0, webhook pipelines, API token management, and accounting data synchronization across QuickBooks Online, Sage Intacct, and Xero.
QBOSage IntacctXeroWebhooks
Useful automation, not noise
AI + Product Experiments
Python data cleaning, scikit-learn experiments, moving average forecasting, sales projection models, and AI-assisted business insights.
Pythonscikit-learnForecastingBI
Selected Work
Production systems across integrations, workflow automation, and reporting.
Resume-backed projects focused on business-critical backend behavior, data movement, and operational reliability.
BackendDataIntegrationsAutomationAI + BI
IntegrationsBackendSecurity
Multi-Accounting Integration Middleware
AccuNexus
- Problem
- Multi-entity accounting workflows needed a secure middleware layer for external platform communication and token-managed data movement.
- Role
- Designed backend structure, database foundations, authentication flows, and integration communication patterns.
- Impact
- Improved reliability and maintainability for complex accounting integrations across multiple systems.
Stack
.NET CoreSQL ServerOAuth 2.0API Token Management
BackendWorkflowAngular
Accounts Payable System
PathQuest AP
- Problem
- AP teams needed reliable workflows for invoice handling, approvals, role-based access, and operational visibility.
- Role
- Built backend APIs, SQL workflows, access control behavior, and Angular-facing integration surfaces.
- Impact
- Helped reduce manual workflow friction while preserving secure, auditable business process boundaries.
Stack
ASP.NET CoreSQL ServerAngularRBAC
AI + BIDataAutomation
Forecasting and reporting automation
BI Reporting & Sales Projection Engine
- Problem
- Business teams needed cleaner reporting flows and practical projections without repeatedly preparing spreadsheets by hand.
- Role
- Worked on data cleaning, reporting automation, sales projection logic, and model-backed insight experiments.
- Impact
- Turned scattered operational data into repeatable business reporting and projection workflows.
Stack
Pythonscikit-learnSQLMoving Average Forecasting
AutomationBackendData
Productivity Management System
PMS
- Problem
- Internal teams needed reliable time, productivity, client, and reporting workflows backed by secure access and automation.
- Role
- Built access flows, timer-triggered backend automation, reporting-oriented data handling, and workflow services.
- Impact
- Improved operational visibility and made recurring productivity workflows more consistent.
Stack
.NETAzure FunctionsNext.jsMySQL
IntegrationsAutomationQBO
Accounting workflow automation
Tax Automation for QuickBooks Online
- Problem
- QuickBooks Online workflows required safer automation around tax-related data movement and synchronization.
- Role
- Implemented integration logic, token-aware API communication, and backend workflow handling for accounting data.
- Impact
- Reduced manual handling risk and improved consistency in QuickBooks-connected tax workflows.
Stack
QuickBooks OnlineOAuth 2.0.NETWebhooks
Parth Labs
A growing workspace for practical developer and data tools.
Labs is where small utilities for JSON, APIs, SQL, data cleanup, operations, and BI workflows will live as they mature.
JSON Tools
PlannedJSON Formatter + Validator
Format, validate, inspect, and clean JSON payloads quickly with browser-local handling where possible.
JSONValidationDebugging
JSON Tools
PlannedJSON Schema Generator
Generate starter schemas from sample payloads for API contracts, validation rules, and documentation.
SchemaAPIsContracts
Data Tools
ExploringCSV / Excel to JSON
Convert tabular data into JSON structures for imports, API testing, fixtures, and reporting workflows.
CSVExcelJSON
SQL Tools
PlannedSQL Formatter
Clean up SQL scripts, stored procedure fragments, joins, and reporting queries without sending data to a server.
SQLStored ProceduresReadability
Principles
How I keep systems useful, secure, and maintainable.
A few operating principles that shape the way I build APIs, workflows, data layers, and tool experiments.
01
Design around the workflow
Good business software starts with how people actually move data, approve work, and recover from failures.
02
Make security part of the shape
Authentication, authorization, RBAC, and token handling belong in the architecture, not as late patches.
03
Keep data paths explainable
Queries, jobs, integrations, and reports should be traceable enough for future debugging and support.
04
Prefer useful tools over loud tools
Small utilities earn their place when they remove repeated friction from real developer and data work.
Contact
Building a backend-heavy product, integration, or tool experiment?
I am open to collaboration around secure APIs, automation, accounting integrations, reporting workflows, and practical developer/data utilities.