Top Backend Developer Jobs

Design and build scalable, reliable backend systems and reactive REST microservices. Translate requirements into architecture, implement high-performance code, work with databases, distributed algorithms, event-driven systems, and DevOps/tooling for deployment and monitoring. Collaborate across teams to drive production-ready solutions.

Design, build, and maintain high-performance, reliable backend services and microservices. Translate requirements into scalable architectures, implement REST/HTTP services, work with RDBMS and NoSQL, enable DevOps and SRE practices, and collaborate across teams to deliver production-grade systems.

Build and maintain infrastructure for reliable, large-scale web data collection. Improve success rates against sites with aggressive defenses, own proxy layer health/rotation/cost, push throughput under spiky load, and debug intermittent failures. Own systems end-to-end in production.

The role involves developing a decentralized darkpool with high-performance matching engine, cross-chain liquidity aggregation, and fault-tolerant architecture while ensuring cryptographic privacy and low latency.

The Backend Engineer will develop high-performance trading systems, optimize algorithms, work with distributed architectures, and ensure system reliability and scalability while collaborating on blockchain-related technologies.

As a Backend Engineer, you will design and implement APIs and services using Node.js, optimize SQL queries, and ensure system reliability.

The backend developer will build backend software focusing on reliable APIs, ensure high-quality output, and collaborate with teams.

The role involves building and scaling backend systems, optimizing APIs, ensuring reliability and performance, and collaborating with cross-functional teams.

The role involves designing data ingestion and processing systems, writing scalable backend applications, and optimizing performance of business-critical endpoints.

As a Staff Backend Engineer, you'll lead the development of backend features in a Django monolith, optimize database performance, and mentor other engineers.

Design, implement, and maintain backend APIs, services, and data pipelines. Optimize database performance, manage Docker-based microservice architecture, ensure software quality with testing and monitoring, collaborate across teams, and serve on-call roughly one week per month.

Design, build, and maintain the call center agent desktop and core backend platform. Develop integrations, automation, and AI-driven workflows to improve agent productivity. Ensure scalable, reliable systems with strong testing and observability. Own features end-to-end and collaborate with Product, Customer Success, and Operations.

Design and maintain backend infrastructure and tooling for an AI evaluations platform. Build production-grade evaluation frameworks for ASR, LLMs, TTS, knowledge bases, and guardrails. Implement API/data integrations, test configuration management, reporting, observability, and debugging tools. Partner with ML, engineering, and QA to operationalize evaluations, enable regression detection and continuous monitoring, and improve developer experience and reliability.

Design, build, and scale backend APIs, microservices, and orchestration layers for a conversational AI healthcare platform. Ensure secure, HIPAA-compliant integrations (EHRs, FHIR), optimize performance and reliability, manage databases and data pipelines, maintain CI/CD and production services, troubleshoot incidents, and mentor junior engineers.

Design, implement, and maintain Python microservices for a real-time voice pipeline (capture, streaming transcription, LLM orchestration, TTS). Integrate providers and transports (WebRTC, SIP, phone), deliver ultra-low latency (<500ms), instrument tracing/metrics (OpenTelemetry), ensure production hardening and HIPAA-compliant security, and collaborate with ML, product, and client SDK teams.

Senior backend developer responsible for designing, maintaining and enhancing Java/Spring automation testing frameworks, ensuring SDLC and quality standards, performing root cause analysis, mentoring junior staff, and driving CI/CD/DevOps and Oracle/SQL based development and testing practices.

The Backend Engineer will design, build, and improve backend systems, focusing on health data processing and AI/ML model efficiency.

Lead backend architecture and implementation for scalable, reliable cloud-hosted web products. Mentor engineers, set standards, integrate agentic AI coding tools, design systems applying ML to large datasets, and balance customer-facing features with technical debt and performance.

Build and improve backend AI infrastructure powering model training, serving, and developer-facing AI products. Improve reliability, latency, and efficiency of distributed AI workloads, collaborate with platform and ML teams, and ship scalable APIs and deployment workflows for Databricks AI services.

Build and maintain cloud-native, scalable backend services (primarily in Golang). Own microservices architecture, ensure security, reliability, and performance. Work with data stores, CI/CD, Kubernetes, and stakeholders to deliver enterprise-grade privacy solutions.

Lead design and delivery of mobile-facing backend APIs and services, own initiatives end-to-end, improve reliability and performance, mentor engineers, collaborate with Mobile, Web, Product, Design, and Platform teams, and modernize legacy systems while supporting high-traffic iOS and Android applications.

Build and maintain data-heavy web applications, APIs, and LLM integrations. Design and implement multi-step agentic workflows, optimize data storage and processing on PostgreSQL/AWS, develop tooling for resilient workflows, and collaborate with the CTO to launch data-driven products.

Build production backend systems that ingest and normalize sensor and hardware data, develop tracking and sensor-fusion capabilities, design services and data pipelines, integrate imperfect real-world feeds, deploy and test in classified/unclassified environments, and collaborate with product, platform, and operational stakeholders to improve reliability and observability.

Own and build core backend services for global payments: design scalable distributed systems, integrate with banks and payment partners, ensure high availability, observability, security, and deployment workflows. Drive backend architecture, APIs, infrastructure as code, mentoring, and operational reliability.

Design, architect, and implement scalable backend services and APIs (Node.js, PostgreSQL, Redis). Optimize SQL and schemas, solve high-scale reliability challenges, integrate AI/LLM features, lead refactors, participate in code reviews and deployments, mentor engineers, and drive projects to production.