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Sahil .

Senior Backend Engineer & Architect · Node.js · Microservices · AWS · AI-Augmented | 7 yrs · FinTech · SaaS · Defense

Gurugram

7+ years of work experience

CarDekho Group
Jun 20251 yr 3 mosPresent

Gurugram, Haryana, India

Leading backend architecture for Rupyy's digital lending platform - FinTech arm of CarDekho Group. • Architected microservices cutting API response time by 35% through service decomposition and connection-pool optimization • Built centralized Content APIs (Express.js) serving structured vehicle data at 99.9% uptime • Designed URL Shortener + Bank API services handling 10,000+ daily transactions with multi-bank failover LoanBox Pro - Greenfield System (Oct 2025 – Feb 2026): • Architected and delivered from scratch in 4 months, processing 800–1,000 loans/day at launch with minimal production issues • Designed versioned journey engine with data-driven stage pipelines (case punching → state transitions → pre/post-disbursal) - versioned by Product Type + Loan Type at lead level; new lending products onboarded with zero code changes • Built parallel post-disbursal verification stage running sales submission, DocChecker PDD, and Deferral checks concurrently - replaced sequential bottleneck • Engineered master data cache layer (SalesUsers, Partners, Cities/Pincodes, journey mappings) eliminating repeated DB hits • Implemented SQS-driven lead state propagation - async event publishing to external client platforms, fully decoupling downstream consumers • Built Bank MIS automation engine - per-lead manual reconciliation reduced from 75–120 min (5–8 sections × 15 min) to under 1 minute (80%+ reduction) AI in my workflow: • Google Antigravity daily for code generation, test runs, and multi-step engineering workflows - ~30% reduction in routine coding time • Claude for architecture review, code review, API contracts, and async debugging • Prompt engineering to auto-generate Express routes from OpenAPI specs ⭐ Raise the Bar - Apr 2026 · Scalable data-driven architecture, reduced TAT and tech dependencies
CarDekho Group
May 20232 yrs 2 mosJun 2025

Gurgaon

• Built and optimized backend systems for Rupyy's digital lending workflows - reduced average API latency by 28% • Led ECS migration from EC2 - full AWS integration with ELB, IAM, CloudWatch: 40% platform performance gain, 44% infrastructure cost reduction (from ~USD 290/month), completed in 30–35 man-days • Introduced modular service architecture improving fault tolerance and deployment speed by 50% • Tightened security compliance and scaled infrastructure ahead of growth targets • Used AI-assisted code analysis to identify bottlenecks in legacy PHP services; AI-generated IaC templates shortened ECS migration prep by ~2 weeks ⭐ Extra Miles - Jul 2024 · ECS migration: 40% perf gain, 44% cost reduction ⭐ Raise the Bar - May 2024 · Modular LoanBox architecture: new product onboarding 10 days → 6 hours
CarDekho Group
Mar 20221 yr 3 mosMay 2023

Gurugram, Haryana, India

Rupyy (FinTech division of CarDekho Group) • Core contributor to LoanBox - end-to-end loan automation platform reducing manual processing time by 45% • Built microservices for multi-bank and NBFC API integrations, improving throughput by 30% • Implemented Redis caching strategies and optimized SQL queries, significantly reducing DB load • Enabled DocChecker feature reducing Disbursed TAT from 43 min to 34 min; page load from 7s to 4s; expanded platform to BikeDekho Finance underwriting ⭐ Delite Hero - Aug 2023 · DocChecker feature: TAT 43→34 min, page load 7s→4s, new loan vertical enabled
Defence Research & Development Organisation (DRDO)
Mar 20211 yrFeb 2022

India

Defence Geoinformatics Research Establishment ( Himparisar ), Chandigarh • Built MIRAJ - secure internal resource and inventory management web app for 200+ users under defense-grade data protection policies • Developed offline map and image processing backend improving data retrieval speed by 60% for field operations • Built in-chat messenger functionality within the web portal
AvitInfotech
Sep 20191 yr 6 mosFeb 2021

Mohali district, India

Developed and maintained backend infrastructure for three commercial SaaS and WordPress products serving enterprise clients. Xagio (xagio.com) WordPress SEO plugin and cloud SaaS platform - now used by 7,900+ users managing 21,700+ websites. Contributed to core plugin infrastructure, MySQL query optimization, and multi-site management features across the SaaS layer. Spiderspanker Backend development and maintenance for enterprise-grade web product. Local Supremacy Server-side development and optimization for local SEO SaaS platform. • Optimized PHP and MySQL queries across all three products - plugin performance improved by 25%, enabling scalable cloud deployments • Maintained reliability and uptime for multi-tenant SaaS environments serving enterprise clients
Deftsoft
Apr 20196 mosSep 2019

mohali

Sahil’s AI Stack

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Education

Amity University Online

MBA, Data Science

Amity University Online

20222 yrs2024
Lovely Professional University

BCA, Computer Science

Lovely Professional University

20202 yrs2022

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Headline

Senior Backend Engineer & Architect · Node.js · Microservices · AWS · AI-Augmented | 7 yrs · FinTech · SaaS · Defense

About

Senior Backend Engineer with 7+ years architecting and delivering high-scale systems in across FinTech, defense, and SaaS - most recently at CarDekho Group (Rupyy), one of India's largest auto-lending platforms. I own backend infrastructure end-to-end: from system design and microservices architecture to production delivery and cross-team technical alignment. I work across both microservices and modular monolith patterns, choosing the right model for the problem rather than defaulting to one. Key impact: → Architected and delivered LoanBox Pro from scratch in 4 months - 800–1,000 loans/day at launch, Bank MIS automation reducing per-lead reconciliation from 75-120 min to under 1 min (80%+ reduction) → Designed versioned journey engine with data-driven stage pipelines - new lending product onboarding from 10 days to 6 hours, zero code changes per product → Cut API latency by 35% through microservice decomposition and connection-pool optimization → Led ECS migration - 40% platform performance gain, 44% infrastructure cost reduction in 30–35 man-days → Built SQS-driven state propagation decoupling LoanBox Pro from all downstream consumers Core stack: → Node.js · PHP · Express.js · JavaScript → AWS (ECS, RDS, Lambda, S3, SQS) · Docker · CI/CD → MySQL · MongoDB · Redis · Elasticsearch → Microservices · Event-driven architecture · REST APIs I treat AI tooling as a first-class engineering discipline - not a productivity hack: → Google Antigravity - agentic development for autonomous code generation, test runs, and multi-step engineering workflows → Claude - architecture review, code review, API contract drafting, debugging complex async flows → Prompt engineering - built internal tooling to auto-generate Express routes from OpenAPI specs, saving the team hours per sprint Recognised 4× by CarDekho leadership: 2× Raise the Bar (2024 & 2026), Extra Miles, and Delite Hero - each tied to a specific system that measurably improved speed, cost, or quality. Open to Senior Backend Engineer roles at product-led companies where system design depth and AI-first engineering matter.

Location

Gurugram

AI stack

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Work experience

Software Development Engineer III at CarDekho Group, Jun 2025 - Present · 1 yr 3 mos, Gurugram, Haryana, India, Leading backend architecture for Rupyy's digital lending platform - FinTech arm of CarDekho Group. • Architected microservices cutting API response time by 35% through service decomposition and connection-pool optimization • Built centralized Content APIs (Express.js) serving structured vehicle data at 99.9% uptime • Designed URL Shortener + Bank API services handling 10,000+ daily transactions with multi-bank failover LoanBox Pro - Greenfield System (Oct 2025 – Feb 2026): • Architected and delivered from scratch in 4 months, processing 800–1,000 loans/day at launch with minimal production issues • Designed versioned journey engine with data-driven stage pipelines (case punching → state transitions → pre/post-disbursal) - versioned by Product Type + Loan Type at lead level; new lending products onboarded with zero code changes • Built parallel post-disbursal verification stage running sales submission, DocChecker PDD, and Deferral checks concurrently - replaced sequential bottleneck • Engineered master data cache layer (SalesUsers, Partners, Cities/Pincodes, journey mappings) eliminating repeated DB hits • Implemented SQS-driven lead state propagation - async event publishing to external client platforms, fully decoupling downstream consumers • Built Bank MIS automation engine - per-lead manual reconciliation reduced from 75–120 min (5–8 sections × 15 min) to under 1 minute (80%+ reduction) AI in my workflow: • Google Antigravity daily for code generation, test runs, and multi-step engineering workflows - ~30% reduction in routine coding time • Claude for architecture review, code review, API contracts, and async debugging • Prompt engineering to auto-generate Express routes from OpenAPI specs ⭐ Raise the Bar - Apr 2026 · Scalable data-driven architecture, reduced TAT and tech dependencies

Software Development Engineer II at CarDekho Group, May 2023 - Jun 2025 · 2 yrs 2 mos, Gurgaon, • Built and optimized backend systems for Rupyy's digital lending workflows - reduced average API latency by 28% • Led ECS migration from EC2 - full AWS integration with ELB, IAM, CloudWatch: 40% platform performance gain, 44% infrastructure cost reduction (from ~USD 290/month), completed in 30–35 man-days • Introduced modular service architecture improving fault tolerance and deployment speed by 50% • Tightened security compliance and scaled infrastructure ahead of growth targets • Used AI-assisted code analysis to identify bottlenecks in legacy PHP services; AI-generated IaC templates shortened ECS migration prep by ~2 weeks ⭐ Extra Miles - Jul 2024 · ECS migration: 40% perf gain, 44% cost reduction ⭐ Raise the Bar - May 2024 · Modular LoanBox architecture: new product onboarding 10 days → 6 hours

Software Development Engineer I at CarDekho Group, Mar 2022 - May 2023 · 1 yr 3 mos, Gurugram, Haryana, India, Rupyy (FinTech division of CarDekho Group) • Core contributor to LoanBox - end-to-end loan automation platform reducing manual processing time by 45% • Built microservices for multi-bank and NBFC API integrations, improving throughput by 30% • Implemented Redis caching strategies and optimized SQL queries, significantly reducing DB load • Enabled DocChecker feature reducing Disbursed TAT from 43 min to 34 min; page load from 7s to 4s; expanded platform to BikeDekho Finance underwriting ⭐ Delite Hero - Aug 2023 · DocChecker feature: TAT 43→34 min, page load 7s→4s, new loan vertical enabled

Software Engineer at Defence Research & Development Organisation (DRDO), Mar 2021 - Feb 2022 · 1 yr, India, Defence Geoinformatics Research Establishment ( Himparisar ), Chandigarh • Built MIRAJ - secure internal resource and inventory management web app for 200+ users under defense-grade data protection policies • Developed offline map and image processing backend improving data retrieval speed by 60% for field operations • Built in-chat messenger functionality within the web portal

Software Developer at AvitInfotech, Sep 2019 - Feb 2021 · 1 yr 6 mos, Mohali district, India, Developed and maintained backend infrastructure for three commercial SaaS and WordPress products serving enterprise clients. Xagio (xagio.com) WordPress SEO plugin and cloud SaaS platform - now used by 7,900+ users managing 21,700+ websites. Contributed to core plugin infrastructure, MySQL query optimization, and multi-site management features across the SaaS layer. Spiderspanker Backend development and maintenance for enterprise-grade web product. Local Supremacy Server-side development and optimization for local SEO SaaS platform. • Optimized PHP and MySQL queries across all three products - plugin performance improved by 25%, enabling scalable cloud deployments • Maintained reliability and uptime for multi-tenant SaaS environments serving enterprise clients

Trainee PHP Developer at Deftsoft, Apr 2019 - Sep 2019 · 6 mos, mohali

Education

MBA, Data Science, Amity University Online

BCA, Computer Science, Lovely Professional University