Top Backend Developer Jobs

Design, scale, and optimize ClickUp's search infrastructure using OpenSearch/Elasticsearch. Improve relevance, speed, and real-time indexing, build vector search capabilities, create evaluation frameworks, and collaborate with AI/backend/product teams to integrate and troubleshoot search at scale.

Build and operate backend services, APIs, integrations, data models, and processing workflows for AI spend visibility and management. Ingest and transform usage and billing data from external providers, ensure reliability and accuracy, own projects through production, and collaborate cross-functionally. Improve system performance and observability while contributing to design reviews, code reviews, mentorship, and initiatives such as inference accounting.

Build backend systems for Ramp’s accounts receivable platform, including payment matching, financial data models, ERP integrations, collections workflows, and accounting synchronization. Own projects from technical design through production, ensuring reliability, correctness, observability, and scalability. Collaborate with product and design, participate in code and design reviews, and mentor engineers while improving customer finance workflows.

Build and own the graph layer and RAG architecture enabling agent reasoning over full patient context. Select graph DBs, design query patterns, and ensure temporal coherence. Implement event-driven Kafka pipelines for auditable, immutable agent workflows and enforce ReBAC permissions. Prioritize safety and scalable AI-assisted workflows, participate in spec and plan reviews, and drive architecture decisions.

Build and operate secure AWS backend systems, healthcare data pipelines, and EHR integrations that transform partner data into model-ready results. Develop FHIR integrations, AI-assisted onboarding tools, infrastructure, CI/CD, monitoring, and production ML operations while supporting product and full-stack needs. Lead partner technical go-lives, establish engineering standards, mentor future engineers, and collaborate with data scientists, clinicians, and IT teams while protecting PHI.

Designs and governs secure multi-cloud foundations across AWS, Azure, GCP, and OCI. Responsibilities include cloud onboarding, landing zones, IAM and policy management, security controls, compliance audits, vulnerability remediation, Infrastructure-as-Code automation, CI/CD pipelines, and cloud cost optimization. The role also partners with engineering and security teams, addresses customer infrastructure needs, and mentors other engineers.

Lead the technical direction and architecture of the Foundations platform team, owning authentication, authorization, SSO, secrets management, tenancy, and core platform services. Design APIs, drive services through launch, make technical decisions, establish engineering standards, and mentor engineers without formal management authority. Partner with engineering and product leaders to align execution with priorities.

Build and operate the platform supporting Honeydew’s digital dermatology product. Responsibilities include migrating data infrastructure to RDS, strengthening AWS security and compliance, standardizing logging, developing AI-assisted vulnerability remediation workflows, creating infrastructure and automation, supporting feature teams, and reviewing code. The role requires backend service and API development, platform security, infrastructure as code, CI/CD, and strong data and architecture skills.

Design, build, and operate Python backend services, APIs, databases, and labeling pipelines for massive autonomous vehicle sensor datasets. Own systems from ingestion through delivery, integrate vendors and internal tools, develop validation and quality monitoring, improve human labeling with ML automation, and collaborate with ML and perception teams. Lead technical design, review code, mentor engineers, and support production reliability through deployment, monitoring, and on-call responsibilities.

Leads technical direction for Venmo’s Consumer Financial Services backend platform. Designs and ships secure, scalable distributed systems for authentication, authorization, verification, and fraud risk. Establishes engineering standards, leads architectural reviews, mentors senior engineers, and coordinates multi-team initiatives. Partners with Product, Legal, Compliance, and Security to implement KYC, AML, GDPR, and PCI requirements. Owns service performance, availability, incident support, and technical strategy across the organization.

Build and scale Known’s backend infrastructure for conversational AI, matchmaking, autonomous agents, and consumer applications. Responsibilities include designing APIs and distributed systems, developing real-time and low-latency services, architecting data pipelines and storage, integrating AI agents with external systems, and owning services through deployment, monitoring, reliability, security, and scaling. The role requires end-to-end ownership and strong product intuition in an in-person San Francisco environment.

Build and maintain high-performance, resilient SDKs across multiple programming languages and platforms. Develop features, improve reliability, collaborate with engineering and product teams, maintain open-source repositories, and influence technical and product decisions. The role requires strong software engineering fundamentals, polyglot development ability, library-building experience, production-quality coding, and expertise in unit, integration, load testing, and benchmarking.

Leads backend software engineering for Asset and Wealth Management systems. Develops secure Java and Python services, designs AWS cloud-native architectures, builds Kafka-based distributed systems, and establishes CI/CD and testing practices. Provides technical guidance, reviews code, drives SDLC automation and responsible AI-assisted engineering adoption, and advises on governance, security, resiliency, and compliance in a regulated environment.

Leads backend software engineering within an agile Asset and Wealth Management team. Develops and reviews secure Java or Python services, designs cloud-native AWS systems, and applies Kafka, distributed systems, CI/CD, and testing expertise. Guides technical teams, influences architecture and operations, and drives enterprise adoption of AI-assisted engineering practices. Establishes governance, quality controls, responsible AI standards, and automation across the software development lifecycle while advising stakeholders and senior leaders in a regulated environment.

Designs, builds, and maintains scalable backend applications, services, and APIs for processing sensor data from smartphones and connected vehicles. Translates business requirements into technical solutions, participates in code and design reviews, supports production systems, and mentors junior developers. The role requires strong programming skills, SQL database experience, AWS experience, and hybrid work in Cambridge, Massachusetts.

Design, develop, test, deploy, and support scalable backend services, APIs, integrations, and cloud-enabled software for a regulated wealth custody and clearing platform. Collaborate across product, architecture, operations, risk, and compliance; participate in design reviews and Agile delivery; troubleshoot production issues; ensure security, resiliency, observability, data integrity, and operational readiness; and mentor junior engineers.

Leads the design, development, and maintenance of complex backend software systems. Owns significant features end to end, makes architectural decisions, improves scalability and performance, ensures code quality, mentors engineers, and collaborates with cross-functional teams. Builds production-ready C# and .NET APIs within microservices and containerized environments, using cloud databases and services. Participates in code reviews, testing, debugging, and continuous improvement.

Build and operate backend services and APIs, design data models, optimize relational databases, create third-party integrations, and improve reliability, security, and observability. The role includes writing tested code, participating in reviews, investigating production issues, and contributing to technical decisions. Preferred experience includes distributed systems, background jobs, event-driven architectures, caching, queues, and performance optimization.

Design and build robust backend services and secure APIs for finance and reader applications. Implement authentication, payments, subscriptions, and finance workflows. Design Postgres/Redis schemas, integrate with financial APIs (BSE Star MF, NSE) and DRM services, and ensure compliance-friendly data handling.

Build Nitra Business Banking backend infrastructure, including account opening, payments, ledgers, transaction processing, reconciliation, APIs, and financial integrations. Design reliable money movement across ACH, wires, RTP, and FedNow while ensuring auditability and financial correctness. Partner with sponsor banks and processors, make architecture decisions, document systems, identify risks, and mentor engineers. The role also integrates banking capabilities with cards, BillPay, expense management, accounting, and healthcare payment products.

Design, build, and operate backend services supporting external penetration testing, including Python APIs, workflow orchestration, ETL pipelines, AWS data lakes, GraphQL and graph APIs, Kubernetes infrastructure, and observability systems. Own service performance, scalability, uptime, deployment, and production operations while collaborating with product, design, and frontend teams. Contribute to architecture, technical documentation, platform stability, and user-facing launches.

Build, deploy, maintain, and monitor highly scalable backend applications and distributed systems. Write performant, secure, fault-tolerant code; review peers’ work; evaluate technologies; develop automated tests; improve observability and availability; manage technical debt; and collaborate across teams to deliver reliable customer-facing platform features.

Develop and evaluate backend security coding tasks for AI systems. Responsibilities include implementing backend features, fixing bugs, refactoring code, optimizing performance, identifying and remediating vulnerabilities, conducting security-focused code reviews, and creating deterministic automated tests and verifiers. The role requires strong backend engineering, application security, debugging, testing, algorithms, and software architecture skills. Work is remote, flexible, part-time, and contractor-based.

Build backend services and AI systems for legal drafting, review, and search workflows. Model legal knowledge into ontologies, develop retrieval and evaluation infrastructure, test LLM prompts, optimize queries and performance, and deploy solutions with customers. The role also includes occasional frontend work in TypeScript and React, customer collaboration, and end-to-end ownership of product features.

Lead the design and hands-on implementation of a multi-tenant SaaS distributed ecosystem spanning cloud, on-premise gateways, and edge devices. Partner with architects, develop scalable Node.js backend services and BFF layers using REST and gRPC, manage infrastructure and deployment, and ensure availability, observability, security, and end-to-end ownership. The role also requires occasional React development and leadership through coding standards and technical execution.