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 strong backend ownership.




- Solid 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, stru

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