CTO/Engineering Lead - Solana ZK Computation Framework

Location: Remote - North America/Asia preferred - Not a must though

Compensation: $200K - $225K

We are building the first Solana-native verifiable computation framework designed to accelerate the adoption of ZK technology and enhance Solana's vision for Internet Capital Markets. Our platform allows developers to outsource complex computations off-chain while generating cryptographic proofs that are verified on-chain. We provide a suite of developer tools and a prover network, currently supporting the RISC Zero zkVM. We are seeking a talented CTO/Engineering Lead to build and scale our engineering team.

As the technical leader, you will be critical in helping us shape the future of verifiable computation on Solana, ensuring we develop the most performant, scalable, and decentralized computation network. You will own the technical roadmap, culture, and architecture, driving our mission to add safety, verifiability, and trustlessness to the Solana ecosystem.

Key Responsibilities:

Do you want the challenge — and the reward — of building your own book of business?

At Keycafe, we’re looking for an Account Executive who thrives on creating new opportunities, closing deals, and owning an entire territory or industry segment. This isn’t account management or order processing — it’s a chance to be entrepreneurial inside a growing SaaS/IoT company and essentially build a business of your own.

What You’ll Do

• Own a market — you will be focused on the Australian market, and you’ll be responsible for growing our top segments as if it were your own business.
• Run high-impact demos that clearly show prospects how our SmartBox product solves their operational challenges.
• Drive the full sales cycle: prospecting, outreach, demos, negotiation, and close.
• Experiment and adapt — try new outreach methods, refine your pitch, and find creative ways to break through.
• Collaborate across teams to ensure smooth handoffs and long-term customer success.

Why Join Keycafe

Staff Backend Engineer - Crypto Trading Platform

location: Remote - US or Europe (US Preferred)

compensation: Competitive Base Salary + Bonus

We are hiring on behalf of our client, a market-leading company at the forefront of crypto trading technology. Their platform is known as the largest in its category, having facilitated over $22 billion in volume for more than 50,000 daily active users. They deliver seamless on-chain trading experiences with advanced tools like DCA & limit orders, sniping, and automatic wallet copy-trading, setting the standard for speed, innovation, and reliability. Your work will be live in the hands of tens of thousands of users immediately upon completion.

They are seeking a Staff Backend Engineer with proven expertise in designing, building, and owning scalable, high-throughput, and low-latency microservices-based backends in TypeScript. This highly autonomous technical leadership role involves reporting directly to the technical co-founders. You will be expected to thrive on complex challenges and drive the development of new innovative features.

Key Responsibilities:

Senior/Lead Backend Engineer - FinTech/Crypto

location: Remote - Fully remote across Europe - they can do B2B or hire through EoR.

compensation: $115K - $130K

We are seeking a Senior/Lead Backend Engineer to join our team dedicated to revolutionizing the FinTech and crypto industries. You will be a pillar of our engineering team, working directly with the product team to solve complex banking and crypto problems. This role requires an obsession with robust architecture, efficiency, and resilience, and a commitment to delivering the most elegant solutions and the best product for our customers.

This is a fast-paced, high-impact role where your speed, ability to deliver, and capacity for elegant problem-solving will be critical. You will be responsible for building the core services that drive our new paradigm in finance.

What you’ll be working on:

Full-Stack Engineer, (AI)

Location: Based in the United States with the ability to work remote or from our Brooklyn office, LATAM or Europe.

Remote | Full-time

Compensation: $160K - $200K

Our client is a pioneer in automated, on-chain economic security systems, providing high-fidelity custom EVM simulations to protect and optimize decentralized finance (DeFi) protocols. Trusted by the industry’s leading platforms to secure and manage billions of dollars in assets, our client enables crypto protocols to refine risk management and capital efficiency through actionable, data-driven insights.

The organization is seeking a proactive and results-driven Full-Stack Engineer to join their AI division. Reporting directly to the Head of Product & AI, this individual will play a critical role in collaborating with the CEO and the AI team to develop a sophisticated financial AI agent. The ideal candidate thrives in high-velocity, self-directed environments and possesses the technical breadth to manage everything from scalable backend services to high-performance, user-facing interfaces.

Key Responsibilities

Are you detail‑driven and eager to grow your skills in multi‑entity accounting, intercompany, and Transfer Pricing support?

Keycafe is hiring an Associate‑level Intercompany Accountant to support day‑to‑day bookkeeping and month‑end tasks across four entities. You’ll report to the CFO, keep our ledgers clean in QuickBooks Online (QBO) with Dext for ingestion, and track daily work in Asana. Schedule is Monday–Friday with at least 4 hours overlap with Pacific Time (BC).

Application: Please apply in English and include your country, time‑zone, and earliest start date.

Role Purpose:

The Cloud DevSecOps Engineer is responsible for designing, implementing, and securing cloud-based infrastructure and CI/CD pipelines. The role ensures seamless automation, robust security integration, and efficient monitoring of systems across OCI and GCP environments to enable secure, scalable, and high-performing applications.

Key Responsibilities:

1. CI/CD Pipeline & DevSecOps

• Design, build, and secure CI/CD pipelines using GitHub Actions.

• Integrate automated security testing (SAST/DAST) using SonarQube and related tools.
• Implement and manage GitOps workflows for continuous delivery using ArgoCD.

2. Cloud Infrastructure & Automation

Senior Software Engineer

Location: Williamsburg, Brooklyn, NYC (100% On-site)

Compensation: $150,000 - $225,000 (Base Salary) + Competitive Equity

We are building the future of digital advertising, transforming the $600B ecosystem by enabling brands to buy creator media like they buy Meta or Google ads. Our AI-native platform delivers performant, scalable, and authentic creator-led marketing, compressing weeks of manual sponsorship work into seconds. Backed by top-tier VCs and named to Forbes’ list of Next Billion Dollar Startups, we are seeking a Senior Software Engineer to join as a foundational member of the engineering team.

As a Senior Software Engineer, you will work directly with our founders, designing, building, and launching new product features from the first line of code to production. You will have significant autonomy and ship real functionality every week, tackling complex engineering problems that directly shape our product and business outcomes.

In this role, you will:

Staff Software Engineer, Machine Learning

Location: Burlingame, CA (On-site, 4 days a week)

Compensation: $145,000 -$250,000 (Base Salary) + Equity Options

We are a rapidly growing AI company applying Large Language Models (LLMs) to transform a critical, high-impact domain within the healthcare industry. We're looking for a highly skilled and experienced Staff Software Engineer, Machine Learning to drive the architecture and scaling of our LLM backend systems.

This role is ideal for an engineer who thrives at the intersection of backend architecture and applied AI, designing the APIs, data pipelines, and infrastructure that make LLMs reliable, secure, and cost-efficient in production. Join us and help push LLMs beyond demos into mission-critical healthcare workflows.

Job Description 🖥️

As a Staff Software Engineer, you’ll be a technical leader responsible for the end-to-end delivery of our core LLM backend projects, setting the engineering best practices, and mentoring peers in system design.

Key Responsibilities:

Staff Data Scientist

Location: San Francisco, CA (100% On-site)

Compensation: $200,000 - $300,000 (Base Salary) + Equity

We are a high-growth, well-funded AI company building the most advanced conversational AI agents for the enterprise, serving customers like Duolingo, Notion, and Rippling. We are seeking a Staff Data Scientist to bring deep technical rigor, advanced statistical methods, and analytical frameworks to our product and business strategy. This role requires a blend of strong analytical expertise, product acumen, and the ability to influence strategic decision-making at the highest levels.

As a Staff Data Scientist, you will be the primary driver of data-driven decision-making and the experimentation culture across the entire company. Your work will directly inform product strategy and company performance.

In this role, you will: