Senior Software Engineer (Backend, AI Infrastructure)

Location: Remote - Must have an overlap with EST 9-5 working hours

Compensation: $180K - $300K

We build mission-critical infrastructure that delivers massive amounts of public web data to the companies training the world’s most powerful AI models. Our unique architecture leverages a massive, distributed bandwidth-sharing network to operate a large-scale global crawler, granting us access to high-quality public web data at scale. On top of this, we've built complex pipelines for ingesting, segmenting, and annotating billions of files, including videos, transcripts, and audio, empowering frontier AI labs with essential datasets.

We are a lean, technical team that moves fast, prioritizing high output and low ego. We are seeking a Senior Software Engineer (Backend) with deep expertise to architect scalable solutions and drive technical excellence as we push the boundaries of open web data and AI.

You will join a small, talented team to lead the design and implementation of highly scalable backend systems. Your expertise will be crucial in ensuring the robustness and maintainability of the infrastructure that supports our massive distributed crawler and data processing pipelines. You will play a critical role in shaping the evolution of the internet's role in AI development.

Senior iOS Engineer (Mobile Lead, Web3 Focus)

Location: Remote - NY or CA preference - will consider US remote

Compensation: $250K - $375K

We are seeking a highly motivated and experienced Senior iOS Engineer to take the mobile lead role in shaping the user experience for an innovative, new asset layer and decentralized platform. This is a unique opportunity to drive the architecture, development, and evolution of our native iOS applications, focusing on delivering a simple, elegant, and trustworthy mobile experience for complex on-chain asset interactions.

You will act as both a hands-on technical contributor and a mentor, shaping the mobile engineering culture alongside product, design, and Web3 teams.

As the Senior iOS Engineer, you will be the mobile expert responsible for defining how users engage with our platform's next-generation asset layer. Your primary focus will be on delivering exceptional UI/UX for consumers, creators, and communities on iOS.

Backend Engineer (High-Performance Trading Infrastructure)

Location: Singapore (Hybrid)

Compensation: $80K - $140K

We are a specialized prime brokerage focused on building robust, institutional-grade infrastructure for large-scale algorithmic trading on a leading platform. We are seeking an exceptional Backend Engineer to build the core infrastructure powering our services, utilizing cutting-edge technologies to meet institutional demands for speed and reliability.

This role offers the opportunity to work on high-performance distributed systems, TEEs (Trusted Execution Environments), advanced cryptography, and next-generation smart contracts.

You will be responsible for designing, implementing, and optimizing the core backend services and blockchain components that enable institutional-grade algorithmic trading. Your work will directly contribute to building systems with the highest standards for performance, security, and low latency.

Key Responsibilities

At Quento, the ICT arm of the Qualco Group, we deliver comprehensive and innovative solutions across AI, Digital Engineering, Cloud, and Cybersecurity, helping businesses accelerate digital transformation. With a presence in Greece, Luxembourg, and Belgium, and backed by the expertise of the Qualco Group, we combine deep technical knowledge with strategic partnerships to support business growth.

At Quento, we empower our people to innovate and lead in delivering transformative ICT solutions to our clients worldwide. Quento Technologies seeks a highly motivated and experienced Back-End/API Developer.

Responsibilities:

Senior Software Engineer - Fullstack (Remote, North America)

Location: Remote (North America: US or Canada)

Salary Range: $180,000 - $210,000 USD

We are a high-growth technology company at the forefront of revolutionizing security and compliance for businesses worldwide. Our advanced platform is trusted by thousands of companies and is backed by top-tier venture capital firms. We are seeking a highly motivated and experienced Senior Software Engineer - Fullstack to join our impactful, highly collaborative team. Every member is critical in shaping our product and culture, and we offer substantial responsibilities that directly impact our continued growth. This is a fully remote position for candidates residing in the US or Canada.

What You'll Do:

At Quento, the ICT arm of the Qualco Group, we deliver comprehensive and innovative solutions across AI, Digital Engineering, Cloud, and Cybersecurity, helping businesses accelerate digital transformation. With a presence in Greece, Luxembourg, and Belgium, and backed by the expertise of the Qualco Group, we combine deep technical knowledge with strategic partnerships to support business growth.

At Quento, we empower our people to innovate and lead in delivering transformative ICT solutions to our clients worldwide. Our high-performing, dynamic, and collaborative environment fosters professional growth at every stage.

Quento Technologies seeks a highly motivated and experienced Senior Java Backend Engineer to join our team and help us build reliable, scalable backend services. You will work with modern Java technologies, cloud-native tools, and distributed systems.

Your responsibilities will entail:

We are a fast-growing tech company with a portfolio of SaaS products serving diverse industries. Innovation, performance, and design precision are core to our values. As we scale, we are looking for talented Senior Fullstack Developers to join our team and take a key role in crafting highly performant, maintainable, and user-focused web applications.

Key Responsibilities
 

• Contribute to both backend (NestJS) and frontend (NextJS) systems by designing and building scalable, secure, and maintainable features, while leading architecture decisions across services, APIs, and cross-stack boundaries. 

• Champion clean code, modular design, and testability through active contribution, reusable components, and mentoring. 

• Drive system-level decisions around performance, observability, and scalability, and ensure alignment between product goals and technical implementation. 

• Own and enforce code quality via reviews, maintain CI/CD reliability, and collaborate closely with DevOps to ensure release stability and consistent environments. 

• Monitor and optimize system performance, define logging and alerting standards, and lead incident response and continuous improvement efforts. 

• Work closely with product, QA, and designers to unblock delivery, while mentoring engineers and fostering technical alignment across squads.

Requirements

Software Engineer, AI (0→1 Product Focus)

Full-time | Hybrid

Location: San Francisco Bay Area

We are a high-growth, well-funded technology company pioneering the Composable Customer Data Platform (CDP) and AI Decisioning space. We empower every business user to leverage data and AI for marketing personalization and business operations. We are looking for a product-minded Software Engineer to explore new 0→1 opportunities in AI and define the future of AI-powered marketing.

This is a unique, high-impact role focused on prototyping and shipping entirely new product ideas. You will blend backend engineering, data analysis, and applied AI to create infrastructure and features that generate insights and content from vast customer datasets.

What you'll work on:

Software Engineer (New Grad/Entry-Level)

Full-time | On-site

Location: San Francisco, CA

We are a rapidly growing, cash-flow positive technology company modernizing a $12 trillion global industry. We are seeking a world-class Software Engineer to join our team, focusing on simplifying complex systems, unifying fragmented data, and building high-scale backend infrastructure. This is a unique opportunity to join an early-stage company with de-risked fundamentals and high impact potential.

This role involves tackling massive technical challenges by connecting and unifying disparate, legacy software systems. You will build the foundational infrastructure and user-facing applications that automate core industry workflows, providing tremendous value to customers.

Role Responsibilities:

Software Engineer (Backend/Fullstack)

Full-time | On-site

Location: San Francisco, CA

We are building a generative AI and Low-code customer support automation platform dedicated to bringing effortless customer and agent experiences to every company. We are seeking a Mid-level Software Engineer to take the lead in designing and scaling the core distributed systems that power our next-generation AI agents.

This is a hands-on, high-impact role for a fast-moving engineer who will drive architectural decisions and technical direction, working directly with the company founders. You will own the full feature lifecycle, from initial concept to high-scale production deployment.

What You'll Do: