Senior Backend Engineer

5 days ago

Delhi NCR, India Rightwalk Foundation Full time ₹ 12,00,000 - ₹ 36,00,000 per year

The Opportunity : Senior Backend Engineer (Python) / Tech Lead

As Senior Backend Engineer / Tech Lead, you will own the backend architecture and LLM/agent infrastructure powering our Chatbot platforms. Our stack includes FastAPI, async Python, SQLAlchemy/ Alembic, Redis, Playwright automation, and LiteLLM/OpenAI integrations. You will serve as the technical lead for architecture, reliability, cost optimization, and team mentorship, ensuring robust, scalable, and efficient systems.

This is a hands-on leadership role for someone who thrives on solving complex backend challenges, building scalable AI-driven platforms, and guiding engineers to excellence.

Key Responsibilities :


1. Backend Architecture & Delivery :


- Lead design and implementation of backend systems including conversation graphs, LLM integrations, persistence layers, and automation workflows.

- Define and evolve architecture to ensure scalability, reliability, and cost efficiency.

- Collaborate with cross-functional teams to integrate backend services with chatbot platforms

and external systems.

2. LLM Pipelines & Integrations :

- Implement robust LLM call pipelines including context construction, token management, safety filters, retries, and cost controls.

- Design inbound webhook adapters and outbound flows for / WhatsApp orchestration, ensuring idempotency, retries, and observability.

- Optimize performance of LiteLLM/OpenAI integrations to deliver seamless AI experiences.

3. Data Persistence & Storage :

- Own persistence patterns using Postgres SQLAlchemy/Alembic and Redis for session/history management.

- Design and manage embedding/vector workflows to support intelligent retrieval and personalization.

- Establish standards for database migrations, indexing, and query optimization.

4. Reliability, Testing & DevOps :


- Improve CI/CD pipelines, test coverage, and release reliability across environments.

- Implement monitoring and observability frameworks (Prometheus, Grafana, Sentry) to ensure uptime and performance.

- Drive best practices in containerization, deployment, and automation (Docker, Kubernetes/Helm).

5. Technical Leadership & Mentorship :

- Mentor engineers through code reviews, knowledge sharing, and technical guidance.

- Define coding standards, enforce engineering best practices, and champion a strong testing

culture (pytest).

- Participate in technical hiring and ensure continuous capability building within the team.

Who Will Thrive in This Role? - Youll love this role (and well love working with you) if :

- 6 years of backend engineering with at least 3 years in technical leadership or project ownership.

- Deep expertise in Python (asyncio), FastAPI, async SQLAlchemy/Alembic, Postgres, and Redis.

- Proven experience integrating LLMs or similar AI systems (prompt pipelines, safety

frameworks).

- Hands-on experience with Playwright or other browser automation tools.

- Strong foundation in testing, observability, CI/CD, Docker, and deployment practices.

Bonus if you have :

- Exposure to LiteLLM, Langfuse, sentence-transformers, vector DBs, or embedding pipelines.

- Familiarity with Kubernetes/Helm for container orchestration.

- Working knowledge of TypeScript and React to collaborate effectively with frontend teams.

At RightWalk, thriving also means embodying our core values every day

Integrity & Ethics : Do whats right, always.

Ownership & Excellence : Take full charge, no excuses.

Resilience & Audacity : Be fearless, even when its hard.

Empathy & End-User First : Listen, understand, and design what matters most.

Helicopter Mindset : Zoom out to think big, zoom in to deliver relentlessly.

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