Top Backend Developer Jobs

Build and maintain the Python-based backend engine for GitLab Duo Chat, including agentic LangGraph flows, the Flow Registry, and Duo Workflow Service. Integrate chat capabilities with GitLab’s Rails monolith and GraphQL API, develop secure and tested high-scale features, optimize performance, review code, address technical debt, and collaborate cross-functionally. Participate in weekday, weekend, and occasional nighttime Tier 2 or Tier 3 on-call rotations.

Leads development of secure, scalable Java backend applications within an agile banking technology team. Designs, codes, tests, troubleshoots, and reviews production software while improving automation, resilience, and operational stability. Evaluates architectures and technologies, promotes software engineering best practices, and coaches teams on AI-assisted development, responsible AI use, cloud-native technologies, continuous delivery, and secure engineering workflows.

Design, build, and evaluate conversational AI agents using Go and Python. Own agent orchestration, sub-agent architecture, prompt engineering, tool integrations, guardrails, approval flows, observability, and evaluation infrastructure. Develop datasets, scorers, regression suites, and quality metrics for production readiness. Collaborate cross-functionally on conversational experiences, make architecture decisions, rapidly prototype agents, harden them for launch, and mentor engineers.

The Back-End Engineer will design and build core platform services, operate production services, and work on AI-powered features while collaborating with cross-functional teams and mentoring junior engineers.

Lead a team and portfolio building cloud-native, distributed microservices and full-stack systems to meet regulatory needs. Collaborate with product managers, mentor engineers, experiment with new technologies, and occasionally code or review code. Deliver robust AWS-based solutions using languages like Java, Python, Go, Scala, Node and container orchestration.

Lead diverse technology projects, mentor developers, and deliver cloud-based solutions while utilizing various programming languages and technologies.

The Senior/Staff Backend Engineer will build AI-driven products, optimize performance, collaborate with teams, and establish best practices for Applied AI at Fora.

The Senior Backend Engineer will build and manage the backend systems for Fora's products, implementing new functionalities, optimizing architecture, and collaborating with cross-functional teams.

The Staff Software Engineer will lead technical strategy, ensure system availability, and develop backend systems at scale, collaborating across teams to drive capacity modeling and operational quality.

Lead technical vision and architecture for a cloud-hosted AI front proxy that governs internal model calls for cost, security, context, and attribution. Design a highly available, low-latency proxy spanning MDM, cloud service, and browser extension; implement cost enforcement, semantic caching, model routing, security hooks, context integration, observability, and cross-team coordination while mentoring engineers.

Design and implement scalable backend services for payment and transaction workflows using Java. Own end-to-end features from data model and APIs to Angular frontends, improve reliability and performance, refactor legacy systems, troubleshoot production issues, and collaborate with product and design. Leverage AI-assisted development tools responsibly and share best practices across the team.

Design, build, and operate Rust services for account creation, identity verification, KYC/CIP decisioning, and asynchronous outcome delivery. Develop provider integrations, testable decision logic, secure PII workflows, policy-driven market configurations, and reliable cloud-native architecture using GCP and Kubernetes. Lead technical design reviews, establish cross-team contracts, respond to incidents, and mentor engineers while improving onboarding approval rates and time-to-funding.

Build and scale Posh’s backend services and APIs, owning systems from design through deployment and on-call. Responsibilities include improving performance and reliability, creating data models and pipelines, embedding security and instrumentation, contributing to architecture and code reviews, mentoring engineers, and participating in technical interviews.

Lead a portfolio and engineering team to design and deliver cloud-based, distributed microservices and full-stack solutions for regulatory needs. Mentor engineers, evaluate and occasionally write code, collaborate with product managers, and leverage cloud platforms, container orchestration, databases, and emerging technologies to build scalable systems.

Lead and mentor a backend engineering team to design and deliver cloud-based, microservices solutions. Collaborate with product managers, drive technical direction, evaluate and write code, and leverage cloud, container orchestration, databases, and emerging AI tooling to meet regulatory and customer needs.

Design and implement Kotlin backend services and end-to-end systems for Toast POS device management. Lead technical designs, estimations, performance optimization, cross-team collaboration, and software quality practices including modern testing and observability. Mentor peers and drive product roadmap alignment with product, hardware, and QA stakeholders.

Lead and deliver quarterly goals for a backend team; guide engineers through ambiguous problems; collaborate with product, design, and analytics; identify and resolve project and technical issues; ensure operational availability and on-call readiness; set code and design quality standards; and mentor and develop team members.

Develop, configure, and maintain back-end enterprise application solutions. Translate requirements into designs and code, use TDD/BDD, participate in CI/CD and code reviews, troubleshoot issues, and deliver reusable libraries and stable deployments.

Design, build, and operate core backend systems powering subscription billing, medication ordering and fulfillment, and partner integrations. Own schema design, business logic, AWS/Kubernetes infrastructure, CI/CD, and production observability. Collaborate with clinical, product, and operations teams to deliver compliant, reliable clinical state machines and AI-assisted workflows that automate operations and improve patient outcomes.

Build and own backend services for a private markets investing platform. Deliver end-to-end software across design, implementation, testing, deployment, and operations. Collaborate with product and engineering teams, iterate on ambiguous problems, apply distributed systems principles, and incorporate AI/LLMs for data extraction and document generation. Participate in recruiting and maintain high-quality delivery practices.

Develop and maintain high-scale backend services, troubleshoot issues, mentor engineers, and collaborate with product teams for feature implementation.

Build and operate a scalable integrations platform for data connectors ingesting petabytes/day. Design and develop distributed, multi-region systems in Go/Python, implement connectors (REST, WebSocket, file), ensure high availability, optimize performance/cost, support production incidents, and drive cross-team platform initiatives and SDK improvements.

As a Senior Backend Software Engineer, you'll design, build, and operate scalable infrastructure systems, contributing to complex data processing libraries and distributed systems, while collaborating with teams to create impactful software solutions.

This role involves developing scalable backend services, collaborating with cross-functional teams, optimizing applications, and building robust APIs for user-facing elements.

Backend Software Engineers design, develop, and maintain high-performance backend services, optimize applications, and build robust APIs while collaborating with cross-functional teams to improve user workflows.