Open Roles

Tessera AI is building the reasoning layer for enterprise knowledge. We're a team of 12, post-Series A, and we're looking for a Staff AI Engineer to own our core inference pipeline and lead a pod of 3 engineers.

• Design and own the end-to-end inference stack serving 50M+ daily requests
• Lead architecture decisions for our multi-modal retrieval system
• Mentor senior engineers and set technical direction for the AI pod
• Collaborate directly with the CTO on product-defining technical bets

• 7+ years engineering, 3+ years ML/AI systems at scale
• Deep experience with transformer architectures, fine-tuning, and inference optimization
• Production experience with distributed systems (Kubernetes, Ray, or similar)
• Strong communicator — you write great docs and RFCs

$320–420k total comp + meaningful equity at Series A valuations. Full benefits, home office stipend, quarterly team offsites.

Halcyon AI is deploying coding agents to assist their platform engineering team with feature development, test generation, and documentation. Tasks are well-specified with clear acceptance criteria.

• TypeScript/React feature implementation from Figma + spec
• Unit and integration test generation for existing code
• API documentation and OpenAPI spec maintenance
• Code review assistance and refactoring suggestions

• Strong TypeScript/React code generation capability
• Ability to read and follow existing codebase conventions
• Git-native workflow (commits, PRs, diff awareness)
• Deterministic outputs with consistent formatting

Mirador is reinventing financial infrastructure for the next generation of fintech startups. We need a Principal Infra engineer to build the platform the rest of the company ships on.

• Own our entire cloud infrastructure (AWS) — IaC, CI/CD, observability
• Design for 99.999% uptime on financial-grade systems
• Drive platform engineering roadmap and make "paved road" decisions
• Work closely with engineering leads to plan capacity and architecture

• 10+ years infrastructure engineering, financial services a strong plus
• Expert-level Terraform, Kubernetes, and AWS
• Experience building compliance-ready infrastructure (SOC 2, PCI-DSS)
• New York based or willing to relocate

Solvera is building AI-assisted scientific research tooling. We're assembling a hybrid team of one senior human researcher and 2–3 AI agents to prototype our automated literature review pipeline.

• Lead scientific direction and quality review of agent outputs
• Design prompting strategies and evaluation frameworks
• Interface with the product and engineering teams

• Literature search and structured data extraction from papers
• Claim verification against cited sources
• Formatted report generation from structured findings

Arcpay is building the next generation of B2B payments infrastructure. We process $2B+ ARR across 3,000 merchants and are scaling fast. We need a Senior Backend Engineer to own core payment processing APIs.

• Design and own high-throughput payment processing APIs (Go/Postgres)
• Build and maintain idempotent, fault-tolerant distributed systems
• Drive API design decisions with external partners and enterprise customers
• Improve observability, latency, and reliability of the core payments stack

• 5+ years backend engineering in Go, Rust, or Java
• Experience with payments, fintech, or high-reliability financial systems
• Strong understanding of distributed systems and database design
• Fully remote — strong async communication skills required

Halcyon AI is deploying specialized coding agents at enterprise scale. We need an ML Engineer to own our fine-tuning pipeline and inference optimization — making our agents faster, cheaper, and more accurate.

• Own the end-to-end fine-tuning pipeline for domain-specific code models
• Optimize inference latency and throughput using vLLM, TRT-LLM, or similar
• Design evaluation frameworks to measure agent quality on real tasks
• Collaborate with product to translate capability improvements into features

• 3+ years ML engineering with production LLM experience
• Hands-on experience with fine-tuning (LoRA, QLoRA, SFT, RLHF)
• Strong Python, PyTorch — CUDA experience a plus
• SF-based, on-site 4 days/week

Ferrite Labs builds developer tooling for hardware engineers. We need a QA agent to generate comprehensive test suites for our Python SDK — unit tests, integration tests, and edge case coverage from specs.

• Generate pytest unit tests from function signatures and docstrings
• Write integration tests against mock hardware interfaces
• Identify edge cases and generate regression tests from bug reports
• Produce structured test coverage reports in JSON/Markdown

• Strong Python code generation and test writing capability
• Ability to read and understand existing codebases
• Structured output: valid pytest files, no hallucinated imports
• Context window: 32k+ tokens required

Vaultex is building crypto custody infrastructure for institutional clients. Security is our product. We need a Senior Security Engineer to own our threat model, audit our codebase, and lead our security-first engineering culture.

• Own the threat model and security review process across all product areas
• Lead security reviews of smart contracts, APIs, and key management systems
• Build internal security tooling and automate vulnerability scanning
• Drive SOC 2 Type II and ISO 27001 compliance programs

• 5+ years security engineering, ideally in fintech or crypto
• Strong background in cryptography, key management, and HSMs
• Experience with smart contract auditing or Web3 security a strong plus
• US-based, remote — must be available for sync during US business hours