Backend & Data Engineer(Junior - Mid Level)

## About the Role Avenrix Services is looking for a Backend & Data Engineer to contribute to an active enterprise client project involving backend systems, data processing, search, and AI-assisted workflows. The role is focused on backend development, database performance, APIs, data synchronization, reliability, and production troubleshooting. You’ll work within an existing engineering environment, so we’re looking for someone who can understand unfamiliar systems, investigate problems independently, learn quickly, and take ownership of assigned work. The core environment includes **Node.js, TypeScript, PostgreSQL, AWS, search infrastructure, and AI/data workflows**. ## What You’ll Work On - Build and maintain backend services using **Node.js and TypeScript** - Develop and improve REST APIs and backend workflows - Work extensively with **PostgreSQL and SQL** - Investigate and improve slow queries and data-access patterns - Support ETL, data pipelines, and data movement between systems - Keep data synchronized across source systems and downstream services - Handle retries, duplicate processing, idempotency, reconciliation, and failure scenarios - Debug backend, database, and production issues - Improve reliability and data consistency - Work with AWS-based services and deployments - Use logs, metrics, and traces to troubleshoot production behavior - Write automated tests and participate in code reviews - Collaborate with engineers working on search, data, and AI-related functionality - Suggest improvements to existing technical approaches when appropriate ## Requirements - Around **1–4 years of professional software development experience**, or strong equivalent project experience - Good JavaScript / TypeScript fundamentals - Backend development experience with **Node.js** or a similar backend framework - Good knowledge of **SQL and relational databases** - Experience with PostgreSQL or a similar database - Understanding of REST APIs - Familiarity with Git and normal software-development workflows - Strong debugging and problem-solving skills - Ability to understand an existing codebase and architecture - Comfortable working independently on assigned tasks - Reliable communication and follow-through - Open to technical feedback and willing to improve quickly - Able to learn unfamiliar tools and technologies when needed ## Data, Search & AI The project includes enterprise search and AI-assisted knowledge workflows. You do not need to be an ML specialist, but familiarity with any of the following is useful: - RAG / retrieval-based AI systems - Search and retrieval - OpenSearch / Elasticsearch - Chunking and re-ranking - LLM applications - Data pipelines - Working with data-science or ML teams - Access-controlled or permission-based data The client team works closely with data science on search, re-ranking, chunking, and AI-related functionality. LIberty_transcript_final ## Observability & Reliability Experience with production monitoring and troubleshooting is valuable. Useful technologies include: - OpenTelemetry - Datadog - Splunk - Prometheus - Grafana - Structured logging - Distributed tracing - Metrics and alerting You do not need experience with every tool, but you should understand how logs, metrics, and traces can be used to diagnose production problems. ## Nice to Have - AWS - Kafka or another event-streaming / messaging system - ETL or data-pipeline experience - OpenSearch / Elasticsearch - OpenTelemetry - Docker - Python - GitHub Actions / CI/CD - Distributed systems - Data synchronization - RAG / LLM applications - Previous experience working with AI or data-science teams ## Communication This role includes regular technical meetings with engineers and project stakeholders. You should be comfortable clearly explaining: - what you’re working on - what you changed - why you chose a particular approach - technical trade-offs - progress and blockers - production issues - recommended next steps Perfect English is not required, but you should be able to understand technical discussions and explain your own work clearly. ## What We Value We’re looking for someone who is: - Dependable and responsible - Honest about what they know and don’t know - Hard-working and willing to investigate difficult problems - Open to feedback - Curious and eager to learn - Comfortable asking questions - Able to take ownership of assigned work - Willing to suggest improvements instead of blindly following instructions The client’s engineering manager specifically emphasized wanting engineers who question weak approaches and propose better solutions rather than simply following what the team or product owner says. LIberty_transcript_final ## AI-Assisted Development Using tools such as **GitHub Copilot, Claude, ChatGPT, or similar AI development tools** is fine. However, you must understand the code you submit, test it properly, and be able to explain your implementation and technical decisions. ## About Avenrix Services Avenrix Services supports businesses through project-based engineering and technology delivery across software, data, cloud, AI, and related technology initiatives. For this engagement, you’ll contribute to an active enterprise client project while working closely with engineering and project leadership.