Lead Software Engineer · AI·Mumbai, India

Production AI systems
that ship.

I design and ship Generative AI products and the backends behind them: LLM pipelines, AI agents with guardrails and evals, and services on Java, Spring Boot, Python, AWS and Azure.

View my work Get in touch
Prathmesh Sadake
Prathmesh SadakeFounding team · Build Fast with AI
What I do
  • Production LLM systemsClaude, Gemini and open models behind real products
  • Secure AI agentsGuardrails, LLM gateways, evals and observability from day one
  • Agent-driven developmentClaude Code, deep agents and MCP as everyday tools
  • Backends and cloudJava, Spring Boot, Python, AWS and Azure
01 / About

A software engineer from Mumbai who builds AI that runs in production.

I care about clean system design, measurable results, and helping the engineers around me grow.

Based in
Mumbai, India
Currently
Lead Software Engineer, founding team at Build Fast with AI
Focus
Secure LLM systems and AI agents in production
On the side
Distributed systems in Java and Spring Boot

I'm on the founding team at Build Fast with AI, where I lead engineering on Generative AI products: LLM pipelines, AI agents and the backend systems around them. The agents we ship run behind guardrails, an LLM gateway, evals and tracing, so they hold up once real users and real data arrive.

Before that I built products at startups as a product engineer and intern, and I still take on freelance work: AI recruiting, interview prep and language coaching products, built end to end.

Outside work I build distributed systems in Java and Spring Boot with Kafka, Neo4j and Kubernetes, and I use Claude Code and deep-agent workflows for most of what I ship.

02 / Experience

Where I've shipped.

Build Fast with AI

Lead Software Engineer (Founding Team)

Jan 2024 to present · Full-time · Remote
  1. 01Lead the engineering of production Generative AI products built on Claude, Gemini and open models, from design through deployment.
  2. 02Ship secure LLM systems and AI agents: guardrails against prompt injection and data leaks, an LLM gateway for routing, rate limits and cost control, eval suites with LLM-as-judge, and tracing so every run can be inspected.
  3. 03Built a document processing pipeline on Redis-backed queues and LLMs that turns unstructured documents into structured data at scale.
  4. 04Cut LLM costs for a large US solar provider's product through token optimization, caching and model routing.
  5. 05Designed and shipped an internal email platform on AWS and PostgreSQL, replacing a paid provider.
  6. 06Work with coding agents and deep-agent workflows (Claude Code, subagents, MCP) as the default way to build, with every change reviewed.
  7. 07Own backend services on PostgreSQL, Redis and Pinecone, ship to production on Azure, and mentor junior developers.
  • OpenAI
  • Anthropic Claude
  • Python
  • AWS
  • Redis
  • PostgreSQL
  • Next.js
  • Node.js
  • TypeScript

Software Development Intern (Founding Team)

Aug 2023 to Jan 2024 · Internship · Remote
  1. 01Designed the database schema, relationships and CRUD operations for the first version of the platform.
  2. 02Built a custom authentication system with sessions and role-based access.
  • PostgreSQL
  • TypeScript
  • Next.js
  • React

BharatOne Care

Software Development Intern

Oct 2023 to Dec 2023 · Part-time · Remote
  1. 01Implemented RESTful APIs for communication between the client and server.
  2. 02Built user authentication and authorization: registration, login, password reset and role-based access control.
  3. 03Took part in code reviews to keep code quality up and learn from more experienced developers on the team.
  • React
  • Node.js
  • JavaScript
  • MySQL

Ensemble Inc

Product Engineer

Nov 2022 to Oct 2023 · Freelance · Remote
  1. 01Developed and maintained responsive web applications with React.js and Next.js.
  2. 02Used Git for version control and collaboration across the development team.
  3. 03Worked in an Agile environment: sprint planning, daily stand-ups, and reviewing application requirements and interface designs.
  • React
  • Next.js
  • TypeScript
  • JavaScript
  • Node.js

TCS iON

Project Intern

Jun 2022 to Jul 2022 · Internship · Mumbai, India
  1. 01Automated the detection of sentiment in textual comments and feedback.
  2. 02Developed a deep learning model to detect the emotions in English sentences and longer passages.
  • Python
  • PyTorch
  • pandas
  • NumPy
  • Jupyter

Earlier roles: MERN Stack Developer at Docsup in 2022, and Web Software Developer at Arca Innovation in 2021.

03 / Work

Systems I have put into production.

  • 01

    Secure AI agent platform

    Production agents behind an LLM gateway, with guardrails for prompt injection and sensitive data, eval suites run on every change, and tracing for every run.

    LLM gateway · Guardrails · Evals · Observability

  • 02

    AI document processing pipeline

    Queue-based LLM extraction that turns unstructured documents into structured, validated data, with failures routed to a person instead of guessed at.

    Redis · LLMs · Azure

  • 03

    Agentic AI projects

    A multi-agent code review orchestrator, an MCP-powered pricing analyst, and UdaPlay, a RAG research agent with tool use and memory.

    Python · Claude Agent SDK · MCP · RAG

  • 04

    Distributed LinkedIn clone

    Java and Spring Boot microservices with a Neo4j connection graph and Kafka notifications, deployed on GKE behind an API gateway.

    Java · Spring Boot · Neo4j · Kafka · Kubernetes

  • 05

    Talkerz: AI English speaking coach

    AI voice interviews that score fluency, pronunciation, grammar and vocabulary in real time, with progress tracking for learners.

    Next.js · Speech APIs · OpenAI · PostgreSQL

  • 06Case study

    Internal email platform

    An email service on AWS SES and SQS with retries, bounce handling and an admin dashboard, replacing a paid provider.

    AWS SES · SQS · Next.js · PostgreSQL

More client work on the freelance projects page.

04 / Skills

The stack I reach for.

AI engineering
ClaudeOpenAIGeminiOpen modelsRAGMulti-agent systemsMCPClaude Agent SDKLangChain
AI security & reliability
GuardrailsLLM gatewaysEvals & LLM-as-judgeObservability & tracingPrompt injection defenceClaude CodeDeep agents
Backend
JavaSpring BootPythonTypeScriptMicroservicesKafkaRedisNode.jsNext.js
Cloud & data
AWSAzureDockerKubernetesPostgreSQLNeo4jPineconeRedis
Credentials
AWS Certified Solutions ArchitectUdacity: Agentic AIUdacity: AI Engineering with ClaudeUdacity: AWS Cloud DevOps
Contact

Let's build something.

I'm open to AI Engineer and SDE roles. If you're hiring or want to talk about a project, reach out.

Email me
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