Senior Staff Software Engineer

ABOUT THE ROLE We're hiring a strong senior IC engineer to own core projects at Writesonic. This is not a management position?it's a hands-on builder role for someone who can go deep into hard problems, ship fast, and think like a product owner from an overall business, use-case, and customer perspective.You will take vague, high-impact problems and turn them into production systems that directly move revenue and retention. You'll work across LLM infrastructure, product features, and AI tooling?operating with full autonomy and minimal hand-holding.

• Own and ship core AI-powered product features end-to-end?from problem definition to production deployment and measurement.
• Design, build, and optimize production LLM systems including RAG pipelines, AI agents, embedding workflows, evaluation frameworks, and fine-tuning pipelines.
• Make architecture and system design decisions across backend services, databases (SQL and vector), APIs, and cloud infrastructure.
• Dive deep into the business domain (marketing, SEO, GEO, content automation) to make smart product and engineering trade-offs.
• Connect every engineering decision to user outcomes?ask ?does this move revenue or retention?? before ?is this technically elegant??
• Collaborate directly with founders and cross-functional teams, operating as a product-minded engineer rather than a spec-follower.

  </li></ul> MUST-HAVE QUALIFICATIONSBackend Engineering Fundamentals

  • Strong proficiency in Python as the primary language.
  • Solid grasp of system design, API design, SQL and vector databases, and cloud infrastructure.
  Production LLM Experience (2+ Years)
  • Built and shipped real production systems using LLMs, RAG pipelines, agents, embeddings, evals, or fine-tuning.
  • Understands the limits of models?not just the hype. Can clearly articulate the difference between RAG and fine-tuning and when to use each.
  Independent Ownership
  • Can take a vague problem, define the solution, build it, and measure its impact without hand-holding.
  • Track record of shipping autonomously and iterating based on real user/business feedback.
  Domain-Diving Instinct
  • Willingness and ability to learn the business domain (marketing, SEO, GEO, content) deeply enough to make smart product calls.
  • This is the rarest trait we screen for?engineers who understand the ?why? behind what they build.
  Business-First Thinking
  • Consistently connects engineering decisions to user outcomes, revenue impact, and retention metrics.
  • Asks ?does this move the needle for customers?? before optimizing for technical elegance.
  NICE-TO-HAVE
  • Open-source contributions or a published technical blog demonstrating depth of thinking.
  • Experience with GEO, SEO, AI search, or content automation systems.
  • Founding engineer or 0-to-1 product experience at an early-stage startup. </li></ul> WHO YOU?LL WORK WITH You'll report directly to the Founder, Head of Engineering and work alongside a lean, high-output engineering team. Expect direct access to leadership, fast decision cycles, and zero bureaucracy. If you?ve thrived at places like Trilogy/Crossover, AI-native startups, or high-bar FAANG teams?you'll feel at home.
    WHY WRITESONIC
    • Work on AI products used by millions?not internal tooling or incremental features.
    • Full ownership of high-impact projects from day one.
    • Startup speed with real revenue and real users.
    • Direct collaboration with founders who are technical and product-minded.
    • Competitive compensation aligned with top-tier IC roles in India.