Role: Senior Full Stack Engineer – Backend Leaning Location: Gurugram, India / On-site Type: Full-time Experience: 3–5 years Reports to: Founder About the Role: AdSynergiX is a performance AdTech company operating across India, SEA, EU, and the USA . We are building a suite of products across AdTech, MarTech, and influencer marketing, including modern SaaS platforms, edge-runtime systems, consumer-scale web products, and high-throughput data infrastructure. We are hiring a Senior Full Stack Engineer – Backend Leaning who can take real ownership across the stack, work directly with the founder, make architecture decisions, and ship to production from week one. This role starts as a senior individual contributor and has the potential to grow into the technical anchor who helps build and lead the engineering team. You will work alongside an existing Product Manager, a Java/Spring backend developer, and a Next.js frontend developer. Core Technical Skills Must Have: • 3–5 years of full stack engineering experience with robust backend ownership. • Strong hands-on experience with Java/Spring,



TypeScript, and Node.js . • Expertise in async patterns, queues, background jobs, and worker architectures. • Strong understanding of system design and architecture , including distributed systems, multi-tenant SaaS, and scalable service design. • Advanced experience with PostgreSQL , including schema design, indexing, query optimization, and performance tuning. • Hands-on experience with Redis in production. • Strong API design experience across REST, GraphQL, or tRPC . • Experience with third-party API integrations, webhook systems, and large-scale data flows. • Cloud and DevOps understanding across AWS, GCP, or Azure , including networking, IAM, containers, CI/CD, and secrets management. • Strong security fundamentals including AuthN/AuthZ, OAuth, JWT handling, rate limiting, and secure-by-default engineering. • Experience building with AI / LLM APIs , including prompting, structur

📌 Senior Full-Stack (Haryana)
🏢 AdSynergiX.
📍 Haryana