Backend Development Jobs

We're building an intelligent AI recruiter that transforms how companies find talent. As a technical lead on this initiative, you'll design and ship new capabilities for Zara, our AI recruiting agent, working with the latest LLMs and agent frameworks. Your role involves everything from prototyping experimental features to deploying production-ready systems that make the agent smarter and more reliable.

Join the engineering team to build and maintain scalable backend services using Python for high-traffic B2C applications. Design REST APIs and backend systems following clean architecture, and develop AI/ML-powered features with exposure to Agentic AI.

Join Devnagri, an AI company focused on making business communication hyper-local for non-English speakers, as a Voice Bot Developer. You'll build and optimize real-time voice bots using open-source models and streaming technologies, working from our Noida office five days a week. This role is ideal for someone with deep experience in voice streaming and a passion for hands-on AI development without relying on proprietary APIs.

This is a contract role for a Senior Software Engineer to help train the next generation of AI systems. You'll build and maintain scalable backend applications, design robust RESTful APIs, and work across AWS, GCP, and Azure to power high-performance distributed architectures. Your contributions will directly influence how AI models learn, reason, and perform using real-world data.

This is a remote contract role for a Rust developer who will build and refine backend APIs while collaborating with an AI research team. You'll work on REST and GraphQL endpoints, handle database migrations, and actively test new AI-powered coding tools in Cursor. The position involves short, intensive testing bursts and detailed feedback loops to shape next-generation developer tools.

This is a unique remote contract opportunity for a backend developer skilled in C# and .NET. Your work will directly influence how next-generation AI systems learn and reason by providing high-quality, real-world input. You'll design and maintain robust backend services and APIs, all while collaborating with a distributed team. No prior AI experience is required—your strong backend expertise is what matters most.

We're looking for a skilled Go developer to join a team building the next generation of AI training systems. Your expertise in creating robust, scalable software will directly shape how AI models learn and perform. You don't need prior AI experience — just solid GoLang chops and a drive to solve complex problems.

Join a remote team building web applications that directly improve how AI systems learn and reason. You'll apply your fullstack skills in Python and React to create robust, scalable features — no prior AI background needed, just solid engineering expertise.

This role offers a unique way to leverage your backend expertise: you'll help train next-generation AI models by building the systems that feed them high-quality, real-world data. Your domain knowledge in backend development is what matters most—no prior AI experience is needed. You'll work remotely on challenging problems that directly impact how AI learns and reasons.

This remote contractor role puts your full-stack expertise to work in an unusual way: helping train next-generation AI systems. You'll use your NodeJS, Python, and TypeScript skills to build robust web applications that directly influence how AI models learn and reason. No AI background is needed — your strong development experience is what matters most.

We're looking for an experienced Go developer to join a project evaluating cutting-edge AI coding tools still in alpha. This remote, contract role involves building backend endpoints, testing AI models, and providing detailed feedback to a research team. It's ideal for someone who loves diving into new technology and has a strong command of Go and modern API design.

This role is about using your Python and Go skills to train next-generation AI systems. You don't need an AI background—just your coding expertise—to help improve how models reason and perform. If you love working on cross-language migrations and building robust systems, this remote contractor position offers autonomy and real impact.

This contract role is for a Python developer who will help train next-generation AI systems by building and refining backend services. You'll contribute your real-world coding expertise to shape how models learn and reason, with no prior AI experience required — just strong development skills. Expect to work remotely in short, intensive bursts, providing hands-on feedback on AI-powered coding tools like Cursor.

This role focuses on building a high-performance, cross-platform desktop application that tracks time and activity for remote teams. You'll work on an Electron.js agent that runs quietly on MacOS and Windows, handling real-time data collection with a strong emphasis on privacy, reliability, and low resource usage. Your contributions will directly improve how thousands of professionals manage their productivity.

This role invites an experienced TypeScript and Rust developer to contribute directly to the training of next-generation AI systems. You'll bring your deep coding expertise to bear on real-world problems, helping shape how language models learn and reason — without needing a background in AI yourself. You'll join a remote team that values clean code, clear communication, and thoughtful problem-solving.

We're looking for a skilled Java developer to help train the next generation of AI systems. In this fully remote contract role, you'll build robust backend components using Java and the Spring ecosystem, directly influencing how AI models learn and reason. Your work isn't just about writing code — it's about creating high-quality, real-world input that sharpens model performance.

This isn't your typical software engineering role—you'll apply your coding expertise to shape how next-generation AI systems learn and reason. Your day-to-day work involves building robust backend and frontend systems that provide high-quality training data for AI models. You don't need prior AI experience; your strong engineering foundation is what matters most.

This is a full-time, remote new-grad role for software engineers who want to dive into building real, customer-facing product features from day one. You'll work on improving Zara, an AI-powered recruiter, and gradually take full ownership of core parts of the system—all while receiving mentorship from senior engineers. The environment is fast-paced and focused on shipping quality code, so you'll be encouraged to make smart speed-versus-quality tradeoffs as you grow.

This role offers you the chance to apply your Java backend expertise to shape the next generation of artificial intelligence. You'll build and refine scalable systems that train AI models, using your core development skills without needing prior AI experience. It's a remote contract position where your technical background directly contributes to cutting-edge advancements.

This role sits at the intersection of applied AI, ML infrastructure, and partner-facing product development. You'll work directly with leading AI labs and enterprises to transform ambiguous research questions into production-grade systems. As a Member of Technical Staff, you'll own everything from data curation and LLM agent workflows to deployment and partner success — all while operating in a fast-moving, remote-first environment.

This role is for a seasoned fullstack developer who will use their web development expertise to help train advanced AI systems. Your work on both frontend and backend will provide real-world data that improves how AI models learn and reason. While you don't need AI experience, your ability to build robust, scalable applications is essential.