Prosenjit S.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I help growing and enterprise businesses fix the systems behind their revenue: CRM, ordering, billing, payments and the integrations between them. I’m a TOGAF 10 certified Enterprise Architecture Practitioner and AWS Certified Solutions Architect with 20+ years in enterprise applications and integration. For seven years I was Senior Solution Architect for Southern Phone and AGL Energy’s telco business in Australia (remote from India). I architected platforms that grew from about 10K to 100K customers and from about 100K to 400,000+ services. Results I’ve delivered: • Replaced Microsoft Dynamics CRM with a purpose-built platform. Phased cutover, zero downtime, recognised by the Managing Director. • Integrated a telco platform with AGL’s Salesforce and SAP through middleware after an acquisition, enabling Telco–Energy cross-sell. I owned the API contracts and worked with the Salesforce, SAP and MuleSoft teams. • Built 15+ carrier, usage and partner integrations through API and event contracts. • Designed a guided multi-product sales journey (basket, credit check, payment method, order submission) and a customer self-service portal. • Architected a B2B sales and payments platform with direct bank-API payouts to 5,000+ recipients over UPI, IMPS, NEFT and RTGS, with maker-checker approval and automated reconciliation. The client recorded 22% sales growth within three months of go-live. How I can help you: • Architecture review and gap analysis, with a clear roadmap • API and integration design: REST, webhooks, event-driven, message queues (RabbitMQ), middleware • Salesforce and SAP integration from source systems • Payment and bank API integration: payouts, reconciliation, no duplicate charges • CRM modernisation, migration and zero-downtime cutover planning • AWS architecture: EC2, S3, IAM, VPC, EventBridge, Step Functions • Architecture governance: principles, decision records, design reviews Who I work best with: telecom, energy, fintech, SaaS and subscription businesses that have outgrown their current setup and need a senior architect to work out what’s broken and design the path forward. You get practical written designs and decisions your team can build from, not vague strategy decks. I’ve also been hands-on with vTiger CRM and PHP/Laravel for years (see my work history), so I can review code as well as diagrams. Send me a short description of your system and the problem. I’ll reply with how I’d approach it.