DEVESH RAWAT / ENGINEER
Toptal Top 3% · Banking-Grade Delivery

Production Agentic AI
for Regulated FinTech

8+ years shipping distributed systems, now building LLM-powered agents for banks and fintechs across GCC, UK, and India. BACS payment rails, Temporal-orchestrated workflows, and agentic systems built to survive an audit — not just a demo.

LangGraph
Temporal Cloud
MCP
RAG
IoT / Telematics
Rust
TypeScript
Python
AWS
View my work Let's talk
🟢 Live in production
⚡ 60% LLM cost cut
~/devesh/stack.json 
{
  "name": "Devesh Rawat",
  "role": "Production Agentic AI Engineer",
  "niche": "Regulated FinTech — GCC · UK · India",
  "current_focus": [
    "agentic-workflows",
    "banking-payment-rails",
    "compliance-aware-rag"
  ],
  "languages": ["Rust", "TypeScript", "Python"],
  "ai_stack": [
    "LangGraph", "CrewAI", "Anthropic SDK",
    "RAG + pgvector", "MCP", "Groq"
  ],
  "infra": ["AWS", "Temporal Cloud", "K8s"],
  "toptal": true,
  "in_production": true
}
Scroll
// production incident, live system detected → recovered → stable
0+
Years of Experience
0+
Production Systems
0
Industry Domains
Top 0%
Toptal Network
About

Builder at heart,
architect by practice

Who I am

I'm a production engineer who ships end-to-end — the person banks and fintechs call when an agentic AI system has to work under audit, not just in a demo. My background spans BACS payment rails, GCC currency-compliant banking workflows, healthcare genomics pipelines, and now LLM-powered systems that have to be fast, observable, and provably correct.

🌏
Bengaluru,
India

Remote-first · IST (UTC+5:30)

TOPTAL

Top 3% Globally

Vetted through Toptal's rigorous screening process. Working with banks and fintechs on high-stakes, compliance-sensitive distributed systems and agentic AI.

Current Focus
Regulated Agentic AI
Payment Rails (BACS)
Compliance-Aware RAG
Semantic Cost Control
MCP Integration
Architecture Principles
  • Event-driven over request-driven for anything async or retryable
  • Temporal for workflows with steps, retries, or compensation logic — payment rails demand it
  • Boring technology wins — PostgreSQL over exotic stores by default
  • Audit trails and observability are day-one requirements — every agent decision needs to be explainable
  • Compliance is a design constraint, not a blocker — build for DPDP/RBI/GCC frameworks from the first commit
Domains
Fintech●
IoT / Mobility●
Regulatory Compliance●
AI Platforms●
Healthcare●
Trading●
Expertise

Built for regulated fintech

Eight years across banking, AI, and distributed systems. Deep expertise in production agentic AI, payment infrastructure, and compliance-aware architecture.

PRIMARY FOCUS · Production Agentic AI
🤖
AI & Agentic Systems
LangGraph CrewAI MCP Server RAG Pipelines Compliance-Aware RAG Semantic Caching Anthropic SDK Multi-Agent Orchestration pgvector Groq API
NICHE · Regulated FinTech
🏦
Regulated FinTech & Payments
BACS Payments ClearBank Mambu Core Banking Currency Cloud GCC Regulatory Compliance DPDP / RBI Awareness Audit-Grade Observability Sharia-Compliant Delivery
⚙️
Backend & APIs
NestJS FastAPI Actix-web Express GraphQL REST gRPC
🗄️
Data & Storage
PostgreSQL TimescaleDB Redis MongoDB DynamoDB S3
☁️
Cloud & DevOps
AWS (SQS/Lambda/ECS) Temporal Cloud Kubernetes Docker GitHub Actions EventBridge
🦀
Systems Programming
Rust Tokio async Axum Serde Media Processing High-throughput
🏗️
Architecture
Event-Driven Microservices CQRS DDD Observability SQS + DLQ
⛓️
Blockchain & Web3
Solidity Solana (Rust) Diamond Standard Ethers.js EVM Chains
Projects

Selected work

Production systems across regulated fintech, agentic AI, and high-performance infrastructure.

📡
IoT / Telematics Live
Nexular — EV Fleet Intelligence ↗
Production telematics AI agent for Nexular's Edge platform — real-time fleet management for electric two/three-wheelers (BodaBodas, TukTuks, motorcycles) across India, Africa & Southeast Asia. LangGraph multi-agent orchestration + hybrid RAG deliver Q&A over high-volume CAN-bus IoT telemetry; Redis semantic caching cuts redundant LLM calls; multi-model routing (Claude Haiku/Sonnet) by query complexity.
LangGraph Hybrid RAG Redis Semantic Cache Kubernetes Hugging Face
🏦
Regulated FinTech Live
Banking Workflow Engine
Durable payment workflow system for a fintech client. Temporal-orchestrated multi-step transactions with compensation logic, idempotency guarantees, and full audit trail. Handles settlement, reconciliation, and fraud checks.
Temporal Cloud NestJS PostgreSQL EventBridge Redis
🔁
Live AI
Agentic Workflow Platform
Multi-step agentic workflow engine for production LLM pipelines. Temporal Cloud for durable orchestration, LangGraph for agent state machines, with human-in-the-loop via signal/query pattern.
Temporal Cloud LangGraph NestJS OpenAI SDK PostgreSQL
⚡
Currently Building AI-Powered
AlgoForge
AI-powered DSA learning platform with MCP server integration. Adaptive problem generation, multi-agent code review, and a custom MCP server for IDE-native problem browsing. LangGraph orchestration under the hood.
LangGraph MCP Server FastAPI Anthropic SDK pgvector TypeScript
📈
Live
Trading Signal Engine
High-frequency trading signal backend processing 50K+ events/sec. TimescaleDB for time-series, Redis pub/sub for real-time fan-out, Rust core for signal computation, SQS-based async order routing.
Rust TimescaleDB Redis AWS SQS Actix-web
🧬
Live
Genomics Data Pipeline
High-throughput genomics ingestion and analysis pipeline. S3→SQS→processor pattern processing terabyte-scale sequencing data. Rust-based parallel parser with AWS Lambda for scalable transformation.
Rust AWS S3 SQS Lambda PostgreSQL
🎨
Web3
Multi-Chain NFT Platform
Upgradeable NFT marketplace across EVM chains + Solana. Diamond Standard proxy pattern, GraphQL notification system for on-chain events, and a Rust indexer for sub-second latency.
Solidity Rust (Solana) Diamond Standard Ethers.js GraphQL
Toolbox

Every tool in the arsenal

The complete inventory, for scanning against a specific requirement — the Expertise cards above are the curated depth version.

Regulated FinTech Stack
BACS PaymentsClearBankMambu Core BankingCurrency CloudTemporal CloudDPDP (India)RBI GuidelinesGCC Financial Regulations
IoT & Telematics
CAN Bus TelemetryReal-Time Fleet TrackingHybrid RAGPredictive MaintenanceHugging Face Embeddings
Languages
RustTypeScriptPython 3.11+JavaScriptSoliditySQLBash
AI / LLM Stack
LangGraphMCP ProtocolAnthropic SDKCrewAILangChainRAG PipelinespgvectorPineconeChromaOpenAI SDKGroq APIQLoRA Fine-tuning
Backend Frameworks
NestJSFastAPIActix-webAxumExpressTokio
Databases & Caching
PostgreSQLTimescaleDBRedisMongoDBDynamoDBS3RDS
Cloud & Orchestration
AWS SQS / Lambda / ECS / EKSTemporal CloudKubernetesDockerGitHub ActionsEventBridge SchedulerAWS Secrets Manager
Blockchain
Solana Programs (Rust)Solidity + Ethers.jsDiamond StandardEVM Multi-chainAnchor Framework
Experience

Where I've shipped

Lead Engineer
Nexular — Real-Time Telematics Platform
Mar 2026 – Present Remote
Architected a production telematics AI agent using LangGraph multi-agent orchestration and hybrid RAG with Hugging Face sentence transformer embeddings, delivering intelligent Q&A over high-volume IoT telemetry streams on Kubernetes. Engineered semantic caching in Redis to eliminate redundant LLM calls. Designed multi-model routing between Claude Haiku and Sonnet based on query complexity. Defined the agent evals framework measuring retrieval accuracy, response fidelity, and orchestration reliability.
LangGraphHybrid RAGHugging FaceRedis Semantic CacheKubernetesPydantic
Contract Software Engineer
Independent Contract via Toptal
Dec 2025 – Feb 2026 Remote
Engineered Rust backend APIs, third-party service integrations, Redis caching strategies, and database query optimization for enterprise clients across a short-term contract engagement.
RustRedisPostgreSQLAPI Integration
Senior Software Engineer
Xoriant Solutions — Nomo Fintech
Nov 2024 – Nov 2025 Gurugram
Led end-to-end delivery of BACS Direct Credit and Debit payment infrastructure integrating ClearBank, Temporal Cloud, and Mambu core banking — eliminating legacy workflow failures across GCC financial products. Directed self-hosted Temporal → Temporal Cloud migration. Engineered compliant currency conversion for GCC markets via Currency Cloud. Led cross-functional delivery of Sharia-compliant Instant Savings Account through production.
Temporal CloudClearBankMambuBACS PaymentsCurrency CloudFintech
Senior Software Engineer
Roadzen Technologies
Apr 2022 – Nov 2024 Remote
Built a high-performance Rust media processing microservice with GStreamer, cutting latency 30% and expanding throughput 50% on the platform's highest-load pipeline. Designed webhook delivery infrastructure using AWS SQS + DLQ, increasing reliability 95%. Optimized PostgreSQL and deployed Redis caching, reducing API response time from 800ms to under 200ms while cutting infra costs 25%.
RustGStreamerAWS SQSPostgreSQLRedisDLQ
Full-Stack Blockchain Engineer
Refinable — Multi-Chain NFT Marketplace
Sep 2021 – Feb 2022 Hong Kong (Remote)
Led architectural design and integration of Solana smart contracts in Rust (Anchor framework) into a multi-chain NFT marketplace, increasing platform activity 35%. Architected an open-source TypeScript SDK with Ethers.js that cut developer integration time 20%. Built a real-time GraphQL notification system for blockchain transaction events, improving user retention 30%.
Solana (Rust/Anchor)SolidityEthers.jsTypeScript SDKGraphQLNestJS
Testimonials

What clients say

Shared with client permission — company names withheld per standard fintech NDA and Toptal non-circumvention terms.

Devesh redesigned our entire payment processing system with Temporal workflows. The solution is rock-solid — we went from fragile cron jobs to durable, observable pipelines with proper compensation logic. Delivery was ahead of schedule.
🧑‍💼
CTO, Fintech Startup
via Toptal · Banking Workflows
The agentic pipeline Devesh built handles over 10,000 documents per day with zero manual intervention. His grasp of LangGraph state machines and RAG architecture is exceptional. Production-stable since launch.
👩‍💼
Head of AI, SaaS Platform
via Toptal · AI Workflows
Our Rust-based trading signal engine now runs at 50K events/sec with p99 latency under 3ms. Devesh made smart architectural decisions throughout — TimescaleDB for time-series, Redis for fan-out. Exactly what we needed.
👨‍💻
Lead Engineer, Trading Firm
via Toptal · High-Frequency Systems
Devesh built our entire NFT platform from smart contracts to indexer to API layer. The Diamond Standard upgrade pattern has saved us multiple times. His blockchain and backend combination is rare and extremely valuable.
🧑‍🎨
Founder, NFT Marketplace
Web3 · Multi-Chain Platform
Engagements

How I work with clients

🏗️
Production Builds
End-to-end delivery of agentic AI and payment infrastructure — from architecture through production. I own the roadmap, not just the tickets.
🔍
Technical & Compliance Audits
Architecture reviews for teams shipping LLM systems into regulated environments — where the fastest chatbot demo and the fastest audit-safe system are two very different builds.
⚙️
Fractional Architecture
Ongoing technical ownership for teams that need a senior architect on tap, not a full-time hire — for systems where correctness and cost both matter.
Start a conversation →
Contact

Let's build
something great

For engineering leaders and CTOs shipping agentic AI in regulated fintech — GCC, UK, and India. Response time: same day.

✉️ Email dvsrwt@gmail.com 💼 LinkedIn Devesh Rawat 📝 The Failure Mode Newsletter 🐙 GitHub devesrawat ⭐ Toptal Profile Top 3% · Vetted

Ready when you are

Whether it's a quick architecture question or a full production build — I'm interested in agentic AI systems that have to survive contact with regulators, auditors, and real transaction volume.

Send a message →