# Senior Product Engineer > Weekday AI · India (Remote) · Full-time · Posted 2026-09-15 **Salary:** INR 1,500,000–2,300,000 **Workplace:** remote **Department:** Weekday's Client via platform ## Description 𝗧𝗵𝗶𝘀 𝗿𝗼𝗹𝗲 𝗶𝘀 𝗳𝗼𝗿 𝗼𝗻𝗲 𝗼𝗳 𝘁𝗵𝗲 𝗪𝗲𝗲𝗸𝗱𝗮𝘆'𝘀 𝗰𝗹𝗶𝗲𝗻𝘁𝘀 𝗦𝗮𝗹𝗮𝗿𝘆 𝗿𝗮𝗻𝗴𝗲: 𝗥𝘀 𝟭𝟱𝟬𝟬𝟬𝟬𝟬 - 𝗥𝘀 𝟮𝟯𝟬𝟬𝟬𝟬𝟬 (𝗶𝗲 𝗜𝗡𝗥 𝟭𝟱-𝟮𝟯 𝗟𝗣𝗔) Experience: 3+ yrs Location: Remote (India), India Job Type: Full-time We are looking for a highly hands-on **Lead Full-Stack Product Engineer** to take end-to-end technical ownership of a production-grade SaaS platform. This role is suited for a senior engineer who enjoys building products, solving complex technical problems, and working across the entire technology stack rather than focusing on a narrow engineering function. You will be responsible for owning the product across **frontend, backend, databases, APIs, AI workflows, third-party integrations, cloud infrastructure, CI/CD, security, observability, analytics, billing, and production operations**. The role requires strong technical ownership and the ability to connect engineering decisions directly to customer acquisition, activation, conversion, retention, and revenue. ## Requirements ### KEY RESPONSIBILITIES - Take end-to-end technical ownership of the production SaaS platform, including codebase, infrastructure, integrations, data, and operational systems. - Audit existing repositories, dependencies, architecture, infrastructure, and deployment processes and establish clear technical documentation and runbooks. - Design, develop, maintain, and enhance full-stack web applications and backend services. - Build scalable frontend experiences, backend APIs, account administration, onboarding, reporting, and self-service product workflows. - Maintain secure **multi-tenant SaaS architecture**, including authentication, authorization, RBAC, and tenant isolation. - Develop and maintain REST APIs, OAuth 2.0 integrations, webhooks, third-party SDKs, queues, workers, schedulers, retries, and idempotent workflows. - Build and maintain integrations with **Google Business Profile, Facebook, Instagram, TikTok**, and other relevant social or business platforms. - Manage OAuth permissions, API scopes, webhooks, content publishing, scheduling, data retrieval, and platform-specific workflows. - Integrate and operate **LLM and generative-AI systems** for recommendations, content generation, sentiment analysis, and intelligent product workflows. - Design and test prompts, monitor AI quality, latency, and costs, and implement appropriate safeguards against issues such as prompt injection. - Maintain content publishing and workflow engines with reliable scheduling, queue processing, retry mechanisms, and time-zone-aware execution. - Manage **SaaS subscription and billing workflows**, including recurring plans, payment webhooks, customer entitlements, and subscription lifecycle events. - Manage transactional email systems, templates, sending domains, authentication standards, and deliverability. - Implement **GA4, Google Tag Manager, product analytics, event tracking, UTM persistence, advertising attribution, and conversion tracking**. - Build product dashboards and measurement systems connecting acquisition activity with activation, conversion, retention, and revenue. - Establish accurate funnel measurement across impressions, landing-page visits, search activity, sign-ups, product activation, platform connections, retention, and churn. - Implement technical SEO improvements, structured data, crawler accessibility, and other product-led growth initiatives where required. - Own CI/CD pipelines, automated testing, database migrations, deployment, rollback, monitoring, alerting, and production incident response. - Ensure appropriate practices for secrets management, security, backups, restoration, disaster recovery, and operational resilience. - Continuously improve application performance, scalability, reliability, security, and engineering efficiency. - Maintain clear technical documentation covering architecture, integrations, operational procedures, and production systems. ### WHAT MAKES YOU A GREAT FIT - **7+ years of professional software engineering experience** with strong hands-on full-stack development expertise. - Proven experience building and operating **production-grade SaaS or web applications**. - Strong proficiency in **JavaScript or TypeScript** and experience with modern frontend frameworks. - Strong backend development experience using the relevant programming language and framework, with expertise in API design and development. - Solid experience with **SQL and/or NoSQL databases**, database migrations, data modelling, and performance optimisation. - Strong understanding of **REST APIs, OAuth 2.0, webhooks, third-party SDKs, asynchronous processing, queues, workers, schedulers, retries, and idempotency**. - Hands-on experience with cloud infrastructure, production deployments, CI/CD, monitoring, logging, alerting, and incident response. - Strong understanding of **secure multi-tenant SaaS architecture**, authentication, authorization, RBAC, tenant isolation, and credential management. - Production experience integrating **OpenAI, Anthropic, Google Gemini, or equivalent LLM platforms** is required. - Proven experience integrating social, business, marketing, or third-party platform APIs. - Strong understanding of **MarTech, product analytics, funnel measurement, attribution, and conversion tracking**. - Experience with several of the following: GA4, Google Tag Manager, UTM tracking, advertising attribution, product-event taxonomy, SaaS onboarding, activation, trial-to-paid conversion, lifecycle email, A/B testing, CRO, PQL identification, technical SEO, CRM/marketing automation, and retention analytics. - Experience with **Google Business Profile APIs** is strongly preferred. - Experience with Facebook, Instagram, TikTok APIs and subscription billing platforms such as Stripe is an advantage. - Strong understanding of production AI recommendation or content-generation systems is an advantage. - Comfortable taking ownership of an existing codebase and infrastructure built by another engineer, team, or agency. - Strong problem-solving, debugging, documentation, and technical decision-making skills. - Excellent written and spoken English with the ability to communicate clearly with technical and non-technical stakeholders. - Highly autonomous, proactive, and comfortable operating with significant ownership and limited engineering resources. - A **senior hands-on builder** who remains deeply involved in coding and technical execution rather than functioning purely as a people manager. - Willingness to take complete responsibility for the reliability, security, scalability, and continuous improvement of a production application. ## Apply [Apply at Weekday AI](https://apply.workable.com/weekday-1/j/18DED2709C/apply) --- Powered by [Workable](https://www.workable.com)