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I'm Rajeev Kumarai, an AI-first full-stack engineer with 10+ years building scalable systems across commerce, payments, and platform ecosystems. I lead end-to-end product development for Rescale OS and Pulsara, leveraging React, TypeScript, Node.js, REST APIs, and LLM integrations to deliver production-ready features independently. I thrive in async, remote environments with rapid iteration cycles. I enjoy turning ambitious ideas into reliable systems, setting clear architecture, data flows, and typed component libraries that empower teams to move fast.…I'm Rajeev Kumarai, an AI-first full-stack engineer with 10+ years building scalable systems across commerce, payments, and platform ecosystems. I lead end-to-end product development for Rescale OS and Pulsara, leveraging React, TypeScript, Node.js, REST APIs, and LLM integrations to deliver production-ready features independently. I thrive in async, remote environments with rapid iteration cycles. I enjoy turning ambitious ideas into reliable systems, setting clear architecture, data flows, and typed component libraries that empower teams to move fast.

Rajeev Kumar

Product Designer, UI Designer, Data Analyst, +5

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I'm Rajeev Kumarai, an AI-first full-stack engineer with 10+ years building scalable systems across commerce, payments, and platform ecosystems. I lead end-to-end product development for Rescale OS and Pulsara, leveraging React, TypeScript, Node.js, REST APIs, and LLM integrations to deliver production-ready features independently. I thrive in async, remote environments with rapid iteration cycles. I enjoy turning ambitious ideas into reliable systems, setting clear architecture, data flows, and typed component libraries that empower teams to move fast.…I'm Rajeev Kumarai, an AI-first full-stack engineer with 10+ years building scalable systems across commerce, payments, and platform ecosystems. I lead end-to-end product development for Rescale OS and Pulsara, leveraging React, TypeScript, Node.js, REST APIs, and LLM integrations to deliver production-ready features independently. I thrive in async, remote environments with rapid iteration cycles. I enjoy turning ambitious ideas into reliable systems, setting clear architecture, data flows, and typed component libraries that empower teams to move fast.

Available to hire

I’m Rajeev Kumarai, an AI-first full-stack engineer with 10+ years building scalable systems across commerce, payments, and platform ecosystems. I lead end-to-end product development for Rescale OS and Pulsara, leveraging React, TypeScript, Node.js, REST APIs, and LLM integrations to deliver production-ready features independently.

I thrive in async, remote environments with rapid iteration cycles. I enjoy turning ambitious ideas into reliable systems, setting clear architecture, data flows, and typed component libraries that empower teams to move fast.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Hindi

Fluent

Portuguese

Beginner

Spanish; Castilian

Beginner

Work Experience

Platform Product Builder / Applied AI Engineer at Rescale Media (Puslara)

January 1, 2026 - Present

Architected 0→1 AI signal-intelligence platform with end-to-end ingestion, scoring, and prioritization from multiple sources; established a centralized source of truth. Built Rescale OS as a multi-user workflow system by translating unstructured, manual processes into automated system logic, reducing decision-making overhead by 60–70%. Implemented API-driven data pipelines using n8n, Zapier, and REST, enabling 100–300 automated outputs daily for a lean founding team. Defined KPIs, managed scope, and maintained rapid delivery cadence in a zero-process, high-ambiguity environment.

Senior Product Manager — Platform & Enterprise Systems at Mumzworld (Tamer Group)

August 1, 2021 - August 1, 2023

Integrated ERP, CRM, and commerce infrastructure (Magento, NetSuite, HubSpot) into a unified B2B platform, eliminating data fragmentation across 6 markets and centralizing inventory/financial data flows; generated $2.1M ARR in Year 1. Redesigned permission-based billing and order-state workflows, accelerated reconciliation from T+5 to T+1, and cut operational overhead by ~60%. Streamlined checkout and transaction processing, improving EBITDA and reducing cart abandonment; led 30+ discovery sessions with Finance, Ops, and Engineering to shape a multi-market roadmap.

Senior Product Manager (Consultant) — Platform Migration & Systems Integration at Foodspring – Mars Group

March 1, 2021 - July 1, 2021

Directed full e-commerce platform migration (Magento → Shopware) across 12 EU markets; mapped system dependencies and API contracts (PayPal, Klarna, Braintree); maintained 99.9% uptime on a ~€62M revenue base during cutover. Enforced backlog hygiene, dependency tracking, and acceptance criteria governance, compressing release cycles by 25% and contributing to +22% B2B revenue growth within 4 months.

Senior Product Owner — Marketplace, Payments & Operations Automation at Jumia Group

November 1, 2019 - October 1, 2020

Owned backlog across 528K+ daily transactions in 11 markets; resolved interoperability issues between checkout, CMS, logistics, and CRM, driving $2.5M incremental revenue and 2.3× conversion. Automated CMS campaigns and workflows, reducing manual overhead by 75% and cutting support volume by ~60% (≈$185K/month saved).

Technical Product Manager — Pricing, Payments & Platform Systems at Lazada (Alibaba Group)

January 1, 2017 - November 1, 2019

Scaled ML-powered pricing and transaction infrastructure across 7 APAC markets; coordinated 12 technology partners on data flows, API contracts, and incentive logic; improved checkout conversion from 5.3% to 12.2% and achieved +18% tx success, 35% wallet adoption, and 22% retention uplift through unified wallet/subscription architecture.

Technology Lead & QA Manager at AJIO (Reliance Retail) / JustEat / Zynga / Indium Software

July 1, 2011 - December 1, 2016

Established Sterling OMS/WMS + SAP MM integration across 200+ warehouses; defined state transitions and acceptance criteria; built Python QA automation framework delivering 85% test coverage and 98% inventory accuracy; enabled 40% faster order processing.

Applied AI Engineer / Founding Engineer at Rescale Media

January 1, 2026 - Present

Sole engineer and product owner across Rescale OS and Pulsara; designed system architecture, implemented production-ready features; debugged API failures; delivered 100–300+ daily ranked outputs via LLM-powered automation; shortened experiment feedback loops from days to hours.

Product Development Manager — API & Systems at HafH (Kabuk Style)

September 1, 2023 - July 31, 2024

Translated product requirements into backend API specifications; collaborated on system design and data validation; drove $550K+ incremental revenue through improvements; automated reporting with SQL-driven dashboards; stabilized deployments.

Senior Product Manager — AI & Technical Systems at Mumzworld (Tamer Group)

August 1, 2021 - August 31, 2023

Designed AI-powered personalization and ranking systems; achieved +209% conversion uplift and +111% CTR; defined data structures, API requirements, and integration specs across 6 markets; improved checkout and payments, boosting conversions.

Senior Consultant — Platform & Integration at Foodspring – Mars Group

March 1, 2021 - July 31, 2021

Directed full platform migration (Magento → Shopware); specified API and payment integrations (PayPal, Klarna, Braintree); maintained 99.9% uptime on €62M revenue base; contributed to +22% B2B revenue growth in 4 months.

Technology Lead & QA Engineer at AJIO · JustEat · Zynga · Indium Software

July 1, 2011 - December 31, 2016

Built Python QA automation frameworks achieving high automation coverage; integrated enterprise systems improving processing speed and inventory accuracy across 200+ warehouses.