Senior Backend Engineer (Node.js/TypeScript)

Location: EMEA / EU Hours - Authorised to work in EMEA

Compensation: €90K - €130K

We are simplifying multi-chain DeFi for traditional financial institutions, fintechs, and service providers. By offering a unified API to access all on-chain liquidity across major blockchains, we enable the best price for same-chain and cross-chain swaps. We are a passionate team on a mission to enable a fairer, more decentralized world, with a heavy focus on making complex technologies accessible through superior user experience.

We are looking for multiple Senior Backend Engineers to lead the design, development, and maintenance of our backend systems. You will ensure our infrastructure is robust, scalable, and secure while collaborating closely with cross-functional teams—including frontend developers, product managers, and designers—to deliver high-quality software solutions.

This role reports directly to our Backend Lead. Our current tech stack includes:

• Node.js running TypeScript in Docker containers
• MongoDB and Redis for data and caching
• ethers.js for blockchain communication
• GitHub, Kubernetes, AWS, and CloudFlare for our GitOps CD chain

Frontend Software Engineer
Location: San Francisco

Hybrid | Full-time

Compensation: $160K – $300K • Offers Equity

We are a high-growth, venture-backed startup that has invented a better way to do research: AI-powered user interviews. Our platform allows global brands—including some of the world’s largest tech and consumer companies—to achieve deeper, qualitative insights at unprecedented speed and scale.

The $140B+ research industry is ripe for disruption, and we are leading the charge. We recently closed a $30M Series B (led by top-tier Silicon Valley investors) following a year where our business grew 8x. We are a tight-knit team of 30 based in San Francisco’s Financial District, and we are looking for a Senior Frontend Engineer to help us define the new standard for understanding people.

The Role

In this role, you won’t just be writing code; you will be a key architect of our user experience. You will collaborate directly with our CTO and CEO to translate complex AI interactions into intuitive, world-class interfaces.

Key Responsibilities

Founding Marketer

Location: New York City

On-site | Full-time

Compensation: $120K - $200K

Every company is becoming a fintech, and we are building the global account layer that powers their financial stack. As companies expand globally, moving and reconciling money remains slow, fragmented, and fragile. We are building the infrastructure that fixes this—and we need someone to tell that story.

As our first marketing hire, you aren’t just executing a playbook; you’re writing it. Working directly with the founders, you will shape how we show up in the world, communicate our vision across our two most important markets (US and LatAm), and turn that narrative into revenue.

What You'll Do:

Software Engineer (Backend & AI Infrastructure)

Location: San Francisco, CA (Financial District)

Employment Type: Full-time - Hybrid

Compensation: $160K – $300K • Offers Equity

We have invented a better way to do research: AI-powered user interviews.

Our platform is used by Fortune 500 companies and global tech leaders to achieve deeper, qualitative insights about their users at unprecedented speed and scale. The research industry is massive (>$140B and growing) and ripe for disruption. While incumbents remain slow and burdened by high-cost services, we are capturing the market with a category-defining product.

We are a tight-knit team of 30 based in San Francisco’s Financial District. Following a breakout year where our business grew 8x, we recently closed a $30M Series B in December 2025—less than six months after our Series A. This is a rare opportunity to join a high-growth startup backed by top Silicon Valley investors as we set the new standard for understanding people.

What you will do:

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.

Forward Deployed Engineer
Location: New York or San Francisco (with frequent travel to customer sites)

On-site | Full-time

We are not building chatbots or copilots; we are building autonomous digital workers. Our first AI employee, Ava, is already functioning as a full-scale teammate for hundreds of companies—managing lead research, outbound sequences, and meeting bookings autonomously.

As a YC-backed company with over $35M in funding and $8M+ ARR, we are currently scaling our "AI worker" ecosystem. We are looking for a Forward Deployed Engineer to act as the technical bridge between our product and our most strategic customers.

The Role

In this role, you will be part engineer, part consultant, and part trusted advisor. You will sit at the intersection of Sales, Success, and Product to ensure our AI employees integrate seamlessly into complex enterprise environments.

Key Responsibilities:

Applied AI Engineer
Location: San Francisco, New York, or Remote USA

Onsite/Remote| Full-time

We aren't building another chatbot or a simple copilot; we are building the future of the digital workforce. Our mission is to create autonomous AI employees that function as full-fledged teammates. Our first Ava, is an AI Business Development Representative (BDR) currently supporting hundreds of companies. She doesn't just assist with tasks—she researches leads, crafts emails in a customer's unique voice, manages her own deliverability infrastructure, and handles meeting bookings autonomously.

The Role:

As our third Applied AI Engineer, you will join a high-growth, YC-backed team (currently at $8M+ ARR) to build the next generation of AI workers. You will tackle massive engineering challenges as we develop "Ava 2.0," a step-change in autonomous capability. Reporting directly to the CPTO, you will have a direct hand in product direction and the architectural backbone of our agents.

Key Responsibilities:

The Mission:

We are building a new way for companies to hire talent - starting with a fundamentally better technical interview. We help staffing and recruiting firms fight fraud, identify top talent, and confidently market that talent to Fortune 500 companies and the best employers in the world.

Company highlights:

• Talent-dense, capable team: We're a team of 6 from Penn, MongoDB, and top tech companies - we have seed-stage headcount with Series A-type metrics
• Well-capitalized: $3.1M seed round led by GSV Ventures & Boxgroup with angels from OpenAI, SpaceX, Retool, etc.
• Traction: We've flown past 7 figures in revenue, with dozens of enterprise staffing customers - including the largest staffing firm in the world
• Market opportunity: Our customers are the premier firms of the $600B+ staffing industry. We're working to reinvent how that market operates from the ground up

What You'll Do:

• Define the new standard of technical interviewing that retires LeetCode and transforms how companies evaluate talent
• Use AI to detect fraud, identify patterns in candidate performance, and accelerate the hiring process

Requirements