Top Software Engineer Jobs in Leon

Build end-to-end full-stack AI features on a Ruby on Rails backend and React frontend, design and run experiments (A/B tests and AI evaluations), implement AI infrastructure for reliable LLM inference, and iterate quickly to scale production-ready LLM-powered products.

Lead design, build, and operate large-scale customer-facing web experiences (Browse, Navigate, Preview). Own multi-phase full-stack features from discovery through rollout and production. Make architecture tradeoffs, improve observability and on-call health, use approved AI-assisted workflows, align cross-team dependencies, and mentor peers.

Develop and maintain supply-chain software using Java and React within agile teams. Deliver continuous value via CI/CD and automated testing, apply evolutionary design, diagnose performance issues, mentor peers, and practice lean/agile principles to create maintainable, high-quality systems.

Build full‑stack features that automate reporting and slide/document generation: database models, async workflows, UI components, AI insights, native charts, data sync optimizations, and integrations with BI and content platforms.

Lead .NET-focused cloud application modernization and development on AWS. Collaborate with architects, PMs, and clients to deliver production-ready solutions, perform migrations (Windows Services, WebForms, MSMQ), containerize with Docker/ECS, implement AI-driven testing, and expand across languages, frameworks, and AI technologies as engagements evolve.

We are seeking a product-minded backend engineer to work on our Customer Studio product, focusing on data performance, analytics, audience syncing, and generative AI. The role requires strong architecture, scalability considerations, and product engagement.

The role involves developing tools for enterprises to manage Hightouch deployments, focusing on access control, change management, and data warehouse performance.

The Software Engineer will work on high-throughput streaming systems, scaling infrastructure to manage billions of events, ensuring low-latency and high performance while delivering projects from start to finish with significant ownership.

The role involves rapid prototyping and architecting production LLM pipelines for AI in marketing workflows. Responsibilities include developing proofs of concept, making AI architecture decisions, building production data agents, and understanding user workflows for seamless AI experiences.

Design, build, and maintain backend microservices (Go) and frontend features (React/TypeScript) for a time & attendance payroll product. Implement scalable APIs, deploy services to Kubernetes, manage infrastructure as code, investigate production issues, perform code reviews, and collaborate with product and design to deliver reliable, user-focused features.

Develop backend systems using C# and AWS, design REST APIs, enhance performance, and automate infrastructure in a remote team environment.

Design and develop robust REST APIs and scalable features utilizing C# and AWS services. Collaborate with a diverse team while focusing on clean code and performance improvements.

As a Backend Developer, you'll create and enhance the backend using Python and TypeScript, design REST APIs, leverage AWS for the platform, and work in a collaborative environment.

Develop and maintain AWS cloud infrastructure using IaC (Terraform/CloudFormation), support CI/CD pipeline improvements, assist deployment automation, monitor and troubleshoot cloud environments, document procedures, and collaborate with teams to adopt DevOps practices.

As an AI Software Engineer, you will develop Generative AI solutions, manage full-cycle development, implement MLOps pipelines, and ensure compliance with AI standards.

Develop and maintain MCP tools and the MCP Toolbox for Databases; expand test coverage for agentic coding assistants; refactor and maintain test frameworks; convert technical posts into production-ready sample code and documentation; build real-world data applications (QueryData) to support product R&D and collaborate with cross-functional teams to accelerate agentic AI adoption.

Build and ship end-to-end features for internal dashboard and customer portal in a TypeScript/Next.js stack. Design UIs, implement APIs, data models, tests, media playback, embedding-based search, secure access controls, and work with large multimodal datasets across Postgres and AWS.

As a Software Engineer, you'll build and maintain Backblaze's billing system and integrate it with various platforms while ensuring reliability and scalability.

Join Aleph's engineering team to develop the Core Product, focusing on user-facing features for financial data insights. Collaborate with leadership, design robust software components, and contribute to system architecture in a fast-paced, remote environment.

Design, build, test, and maintain scalable web applications and backend services. Collaborate with cross-functional teams, write clean production-ready code, integrate APIs and databases, troubleshoot and optimize performance, participate in code reviews, and maintain technical documentation.

Develop and maintain enterprise insurance applications using the Microsoft .NET stack. Build distributed n-tier systems, RESTful APIs, and SQL Server databases; write unit tests; participate in architecture, code reviews, and Agile Scrum ceremonies; troubleshoot production issues and collaborate with product, QA, and stakeholders.

Develop and optimize distributed systems for syncing customer data, focus on scalability, reliability, and performance for global clients.

Build and maintain end-to-end web applications powering sales and operations. Design tools for quoting, scheduling, and fulfillment, integrate AI into products, collaborate on UX, ship high-impact features, and contribute to architecture, deployment, and engineering culture.

Build and ship end-to-end UI and backend features for Protege's internal dashboard and customer portal in a TypeScript/Next.js codebase. Design complex, data- and media-heavy workflows, optimize streaming and previews, implement APIs and data models (Postgres, AWS), ensure secure handling of sensitive data, mentor the team, and turn UI patterns into reusable design-system components.

Design, implement, and scale Rust services and libraries for trading, payments, and crypto. Build reliable, high-performance distributed systems, collaborate on architecture, write testable async network code, and own production systems end-to-end.