Job Description Role: Senior Full Stack Engineer – Backend Leaning
N Location: Gurugram, India / On-site
N Type: Full-time
N Experience: 3–5 years
N Reports to: Founder
N n About the Role:
NAdSynergiX 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 contemporary SaaS platforms, edge-runtime systems, consumer-scale web products, and high-throughput data infrastructure.
NWe 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.
N nThis 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.
N n Core Technical Skills
N Must Have:
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- 3–5+ years of full stack engineering experience with strong backend ownership.
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- Strong hands-on experience with Java/Spring, TypeScript, and Node.Js .
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- Expertise in async patterns, queues, background jobs, and worker architectures.
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- Strong understanding of system design and architecture , including distributed systems, multi-tenant SaaS, and scalable service design.
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- Advanced experience with PostgreSQL , including schema design, indexing, query optimization, and performance tuning.
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- Hands-on experience with Redis in production.
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- Strong API design experience across REST, GraphQL, or tRPC .
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- Experience with third-party API integrations, webhook systems, and large-scale data flows.
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- Cloud and DevOps understanding across AWS, GCP, or Azure , including networking, IAM, containers, CI/CD, and secrets management.
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- Strong security fundamentals including AuthN/AuthZ, OAuth, JWT handling, rate limiting, and

📌 Hiring: Senior Full-Stack (India)
🏢 AdSynergiX.
📍 India