Staff Software Engineer (Backend)

Location: San Francisco, New York, or Remote (US)

On-site/Remote| Full-time

Compensation: $225K – $300K 

We aren't building another chatbot or a "copilot" to sit on a sidebar. We are building the next generation of the workforce: Autonomous AI Employees.

Our flagship product is an AI Business Development Representative (BDR) that doesn't just assist a sales team—it joins it. She researches leads, manages her own deliverability infrastructure, handles objections, and books meetings autonomously. With over $8M ARR, $35M+ in funding (including Y Combinator), and a rapidly growing customer base, we are now tackling the engineering mountain of "Ava 2.0." We are looking for foundational engineers to build the backend orchestration that makes autonomous digital workers a reality.

The Role

As a Staff Software Backend Engineer, you will build the engine that allows AI employees to think, act, and evolve. This is a high-leverage role where you will own major portions of a platform that replaces an entire enterprise sales stack—including CRM, lead databases, and campaign engines—within a single product.

Key Responsibilities

Member of Technical Staff (Infrastructure)
On-site | Full-time
Compensation: $140K-$200K (CA$190K – CA$280K)

We are building the open-source browser infrastructure that powers the next generation of AI agents. With over 6,000 GitHub stars and millions of sessions served monthly, our platform grew 50x in 2025 alone. We provide the "eyes and ears" for AI, allowing developers to ship products that interact with the web seamlessly via our API.

As one of our first ten employees, you will join a high-performance, talent-dense team of four. We are backed by world-class investors and focused on solving the hardest problems in distributed systems, from kernel-level debugging to global VM orchestration.

The Role

As a Member of Technical Staff, you will build and scale the distributed systems that power millions of browser sessions. Browsers are notoriously resource-heavy; your mission is to make them fast, ephemeral, and globally accessible. You will work across the stack, but your primary focus will be on the core infrastructure that ensures sub-second startup times and robust multi-tenant isolation.

Key Responsibilities:

Member of Technical Staff (Applied AI Engineer)
Location: Toronto

Onsite | Full-time

Compensation: $140K - $260K

We are building the open-source browser infrastructure that powers the next generation of AI agents and applications. By providing a high-performance Sessions API, we enable developers to build products that interact with the web as seamlessly as humans do.

After growing our platform 50x in 2025 through pure word-of-mouth and a vibrant open-source community (6,000+ GitHub stars), we are looking for an engineer to help us define the frontier of browser automation. We are a small, talent-dense team backed by world-class investors, and we move with high intensity to shape the future of the internet.

The Role

You will sit at the intersection of product, research, and community. This isn't a traditional ML role or a pure DevRel role—it’s both and neither. You will be the bridge between AI agent builders and our core infrastructure, working directly with the founding team to define what gets built.

You will run experiments to determine what actually works for browser automation with AI, then turn those insights into frameworks, research, and content that developers love. We work hard, move fast, and expect the same intensity from our team; late nights and weekend work are part of the journey when building something exceptional.

Senior Staff Backend Engineer

Location: Manhattan, New York

Onsite | Full-time

We are the development powerhouse behind one of the largest and most high-traffic platforms in the digital asset space. Currently processing ~$1B in daily volume, our technology stack handles low-latency, high-throughput, and constant load at a scale few companies ever reach.

The Role

In this role, you will act as a technical anchor, overseeing the integrity and evolution of our core backend systems. You will balance high-level architectural governance with deep-tier execution, driving technical excellence from the front. Your primary focus will be the proactive mitigation of scaling risks and the design of durable, fault-tolerant systems capable of sustaining high-throughput workloads.

What You’ll Do:

Senior Blockchain DevOps Engineers
Employment: Full-time via MLabs
Engagement: Contracted to a UAE-based enterprise blockchain / fintech client
Location: Remote (Eastern Europe / MENA / India preferred)

Job Description
MLabs is hiring a Senior Blockchain DevOps Engineer to support a large-scale blockchain and financial technology program for a UAE-based enterprise client.
You will be responsible for deploying, maintaining, and scaling blockchain infrastructure in production environments. This role combines modern DevOps practices with blockchain node operations, automation, and high-availability system design.
The ideal candidate has hands-on experience operating blockchain nodes and managing secure, production-grade infrastructure in distributed environments.

Responsibilities

• Deploy, configure, and maintain blockchain nodes and supporting infrastructure
• Design and manage CI/CD pipelines for blockchain and backend services
• Automate infrastructure using Infrastructure as Code tools
• Ensure high availability, scalability, and security of blockchain systems
• Monitor system performance and troubleshoot distributed environments
• Implement logging, monitoring, and alerting solutions
• Collaborate with protocol, smart contract, backend, and security teams

Requirements

Senior & Lead QA Automation Engineers

Employment: Full-time via MLabs
Engagement: Contracted to a UAE-based enterprise client
Location: Remote (Eastern Europe / MENA / India preferred)

MLabs is hiring Senior and Lead QA Automation Engineers to support a large-scale financial technology program for a UAE-based enterprise client. You will be responsible for designing and implementing automated testing frameworks across web, mobile, backend, and blockchain-integrated systems. The role requires a strong automation-first mindset and experience working in enterprise or regulated environments. Lead-level candidates will drive QA strategy, establish automation standards, and mentor distributed QA teams.

Responsibilities

• Design, develop, and maintain automated test frameworks
• Implement API, UI, and integration test automation
• Collaborate with engineering teams to ensure test coverage across backend and frontend systems
• Develop and maintain CI/CD-integrated test pipelines
• Identify, document, and track defects in complex distributed systems
• Improve testing strategies to ensure scalability, security, and performance
• Lead Engineers: define QA strategy, mentor QA engineers, and drive quality standards across teams

Requirements

Senior & Lead Java Engineers

Employment: Full-time via MLabs
Engagement: Contracted to a UAE-based enterprise client
Location: Remote (Eastern Europe / MENA / India preferred)

MLabs is hiring experienced Senior and Lead Java Engineers to support a large-scale financial technology program for a UAE-based client. Engineers will work on enterprise backend systems integrated with blockchain infrastructure. The role focuses on building scalable, high-performance services in a distributed environment. Exposure to smart contracts and blockchain technologies is highly desirable. Lead-level candidates will provide technical leadership and mentor distributed teams.

Responsibilities

• Design, develop, and maintain scalable Java-based backend services
• Build and integrate RESTful APIs within a microservices architecture
• Collaborate with cross-functional teams to deliver high-quality solutions
• Optimize system performance, reliability, and security
• Contribute to blockchain integration and smart contract interaction (where applicable)
• Participate in code reviews and uphold engineering best practices
• Lead Engineers: provide technical guidance, mentor team members, and support architectural decisions

Requirements

Senior & Lead Fullstack Engineers (React / Node.js / MERN)

Employment: Full-time via MLabs
Engagement: Contracted to a UAE-based enterprise client
Location: Remote (Eastern Europe / MENA / India preferred)

MLabs is hiring Senior and Lead Fullstack Engineers to support a large-scale financial technology program for a UAE-based enterprise client.

This role combines modern frontend development with scalable backend services. You will work across the stack, building secure web applications using React and Node.js within a distributed, enterprise-grade environment. Lead-level candidates will contribute to architectural decisions across both frontend and backend systems.

Responsibilities

• Develop and maintain fullstack applications using React and Node.js
• Design scalable RESTful APIs and backend services
• Build secure, performant frontend interfaces
• Integrate applications with databases and enterprise systems
• Optimize system performance across the stack
• Participate in architecture discussions and code reviews
• Lead Engineers: provide cross-stack technical leadership and mentor teams

Requirements

Employment: Full-time via MLabs
Engagement: Contracted to a UAE-based enterprise blockchain / fintech client
Location: Remote (Eastern Europe / MENA / India preferred)

MLabs is hiring a Senior Protocol Engineer to contribute to the core infrastructure of a custom Layer-1 blockchain ecosystem supporting enterprise-grade financial systems.

You will work at the protocol layer, contributing to consensus mechanisms, node architecture, networking, and system-level performance. This role requires deep distributed systems expertise and hands-on experience working on blockchain infrastructure rather than application-layer smart contracts.

The ideal candidate is comfortable operating in performance-critical, security-sensitive environments and contributing to protocol evolution discussions.

Responsibilities

• Design and implement core blockchain protocol components
• Contribute to consensus performance, scalability, and reliability improvements
• Optimize node performance and system-level efficiency
• Work on P2P networking and state synchronization mechanisms
• Identify and mitigate protocol-level vulnerabilities
• Collaborate with smart contract, infrastructure, and backend teams
• Participate in architecture reviews and protocol evolution discussions

Requirements

Employment: Full-time via MLabs
Engagement: Contracted to a UAE-based enterprise blockchain / fintech client
Location: Remote (Eastern Europe / MENA / India preferred)

MLabs is hiring a Senior L2 Engineer to contribute to the design and development of Layer-2 scaling solutions within a custom blockchain ecosystem supporting enterprise-grade financial systems.

You will work on rollup mechanisms, transaction batching, cross-layer communication, and performance optimization between Layer-1 and Layer-2 environments. This role requires strong blockchain systems knowledge with a focus on scalability, execution logic, and security. The ideal candidate has hands-on experience building or contributing to Layer-2 or scaling infrastructure in production environments.

Responsibilities

• Design and implement Layer-2 scaling components
• Contribute to rollup architecture and transaction batching logic
• Develop cross-layer communication and bridging mechanisms
• Optimize throughput and latency across blockchain layers
• Ensure correctness and security of L2 state transitions
• Collaborate with protocol, smart contract, and infrastructure teams
• Participate in architecture discussions and performance reviews

Requirements