ARNIA
Senior Backend (Node) Engineer – AWS & GraphQL
Skills
2 months ago
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Important information
Location:
Bucharest, Romania
Work mode:
Onsite
Published on:
31 August 2026
What they need
We are looking for a Senior Backend Engineer to join a team working on a cloud-native platform built around TypeScript, Node.js and AWS serverless technologies.
The role combines backend development, GraphQL API design and serverless architecture. We are looking for someone who can contribute hands-on, take ownership of technical decisions and proactively help improve the way the platform is designed and built.
Responsibilities
- Design, develop and improve backend services using TypeScript and Node.js.
- Build and evolve GraphQL APIs using Apollo Server and AWS AppSync.
- Develop serverless solutions using AWS Lambda and API Gateway.
- Work with AWS services such as DynamoDB, SQS and SNS.
- Design and maintain infrastructure using AWS CDK.
- Contribute to workflow orchestration and event-driven backend architectures.
- Improve monitoring, logging and overall observability of backend services.
- Review existing technical solutions and suggest architectural improvements.
- Collaborate closely with other engineers through technical discussions, pair programming and knowledge sharing.
- Help define and promote best practices around GraphQL and AWS serverless development.
Required skills
- Strong experience with TypeScript and Node.js.
- Solid hands-on experience with AWS serverless architectures.
- Strong experience with AWS Lambda.
- Good experience with GraphQL and Apollo Server.
- Experience with AWS AppSync.
- Experience with AWS API Gateway.
- Hands-on experience with AWS services such as DynamoDB, SQS and SNS.
- Experience with Infrastructure as Code, preferably AWS CDK.
- Good understanding of event-driven and distributed architectures.
- Strong ownership mindset and ability to proactively identify and suggest improvements.
Nice to have
- Experience with AWS Step Functions and serverless orchestration.
- Experience with observability, distributed tracing and monitoring.
- Experience with vector databases or semantic/vector search, particularly pgvector.
- Experience with hybrid or faceted search.
- React or broader full-stack development experience.
- AWS Fargate experience.
Why join us?
- Work on a modern, cloud-native platform using TypeScript, GraphQL and AWS serverless technologies.
- Have real input into technical decisions and architecture, not just implementation.
- Work with a senior engineering team where knowledge sharing and technical ownership are genuinely valued.
- Contribute to new capabilities around search and discovery, including vector-based approaches.
- Join a project where there is room to challenge existing solutions, improve patterns and introduce better ways of working.
Share this job:
competitive compensation packages
performance bonuses
flexible working hours
job rotation
learning through Arnia Academy
attractive projects
trainings
international work experience
referral program
medical benefits
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