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Join a startup on the way up — not a bet, not a giant.

Tech roles at Series A–C companies backed by Sequoia, a16z, Benchmark & other top-tier VCs

  • Sequoia
  • a16z
  • Benchmark
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  • Founders Fund
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  • Thrive Capital

Open roles

High-signal tech roles at Series A–C companies, refreshed as boards update.

20 results on this page
Jobs per page
PreviousPage 29Next
Reflection AI logo
Member of Technical Staff - Engineering Lead, Platform Foundations
1/20Posted 2 weeks ago

Reflection AI · San Francisco, San Francisco County, California

Onsite
Series B
20 results on this page
Jobs per page
PreviousPage 29Next
11–50
$1B-$10B
Lightspeed Venture Partners
BGP
CI/CD
DNS
Grafana
+7 more
Posted 2 weeks agoSee job

Reflection is hiring an Engineering Lead for its Platform Foundations team. This role leads a team building cloud infrastructure, networking, security, and developer tooling. You'll mentor engineers and manage vendor relationships.

Reflection AI logo
Member of Technical Staff - Engineering Lead, Shared Services
2/20Posted 2 weeks ago

Reflection AI · San Francisco, San Francisco County, California

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Distributed Systems
Kubernetes
Posted 2 weeks agoSee job

Reflection is a research lab making intelligence open and accessible. The Shared Services team builds and operates the systems that power research and training. As Shared Services Lead, you'll lead the team, mentor engineers, and guide technical decisions.

Reflection AI logo
Member of Technical Staff - Engineering Lead, Applications
3/20Posted 2 weeks ago

Reflection AI · San Francisco, San Francisco County, California

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
FastAPI
Go
gRPC
React
+2 more
Posted 2 weeks agoSee job

Reflection is seeking an Engineering Lead for its Applications team to build and mentor a full-stack team, guide technical decisions, and deliver internal and customer-facing product surfaces. This role requires deep full-stack experience and leadership.

Reflection AI logo
Workplace Experience Manager (D.C.)
4/20Posted 2 weeks ago

Reflection AI · Washington, District of Columbia

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Posted 2 weeks agoSee job

Reflection AI seeks a Workplace Experience Manager to own day-to-day operations of its new Washington D.C. office, including facilities, vendors, onboarding, events, and compliance. This hands-on role is the first line of defense for the physical workplace, partnering with People Ops and IT.

Reflection AI logo
Subject Matter Expert - Election Integrity, Violent Extremism, and Fraud
5/20Posted 2 weeks ago

Reflection AI · New York, New York County, New York

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Python
SQL
Posted 2 weeks agoSee job

Reflection is seeking a Subject Matter Expert to lead election integrity, violent extremism, and fraud prevention for its open AI models. The role owns evaluations, enforcement workflows, and external coordination to ensure safe open releases.

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Reflection AI logo
Manager of Technology & Security Engineering
6/20Posted 2 weeks ago

Reflection AI · New York, New York County, New York

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Detection Engineering
FedRAMP
Identity and Access Management
ISO 27001
+10 more
Posted 2 weeks agoSee job

Reflection is seeking a Head of Technology & Security Engineering to architect and operate security across corporate, cloud, and GPU training infrastructure, with a focus on zero-trust, security-as-code, and detection engineering.

Reflection AI logo
Member of Technical Staff - Data Platform
7/20Posted 2 weeks ago

Reflection AI · New York, New York County, New York

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Apache Airflow
Apache Flink
Apache Iceberg
Apache Kafka
+5 more
Posted 2 weeks agoSee job

Reflection is hiring a Member of Technical Staff for its Data Platform team. You will build and operate core data systems, pipelines, and infrastructure to power research, training, and production for open AI models. Collaborate across teams to ensure scalable, reliable, and reproducible data workflows.

Reflection AI logo
Trust, Safety and Integrity Counsel
8/20Posted 2 weeks ago

Reflection AI · New York, New York County, New York

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Artificial Intelligence
Cloud Computing
Cybersecurity
Posted 2 weeks agoSee job

Reflection AI is seeking a Trust, Safety and Integrity Counsel to lead legal support for AI safety risks and regulations, advising on global regimes and designing compliance processes for frontier AI development.

Reflection AI logo
Executive Assistant
9/20Posted 2 weeks ago

Reflection AI · New York, New York County, New York

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Google Workspace
Slack
Posted 2 weeks agoSee job

Reflection is seeking an Executive Assistant to support a senior leadership team in New York. The role involves complex calendar management, travel coordination, and administrative support, requiring excellent judgment and discretion. This is an on-site position.

Reflection AI logo
Manager of Risk & Governance
10/20Posted 2 weeks ago

Reflection AI · New York, New York County, New York

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Posted 2 weeks agoSee job

Reflection is seeking a Head of Risk & Trust Governance to design and mature enterprise risk management frameworks, oversee controls and policy governance, and represent the organization externally on AI safety and regulatory matters. This high-visibility role operates across all functions, requiring deep expertise in risk frameworks, AI governance, and executive communication.

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Reflection AI logo
Manager of Identity & Access Management
11/20Posted 2 weeks ago

Reflection AI · New York, New York County, New York

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Amazon Web Services (AWS)
Go
Google Cloud Platform (GCP)
Kubernetes
+7 more
Posted 2 weeks agoSee job

Reflection is seeking a Manager of Identity & Access Management to architect and operate its zero-trust identity infrastructure, protecting researchers and compute environments from nation-state threats. This role requires deep security architecture expertise and software engineering skills to build custom tooling and eliminate static credentials.

Reflection AI logo
Head of Marketing
12/20Posted 2 weeks ago

Reflection AI · New York, New York County, New York

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Posted 2 weeks agoSee job

Reflection AI is seeking a seasoned marketing leader to build and lead its marketing organization, owning strategy across corporate, product, and growth marketing. The role requires 12+ years of experience and a track record in technical brands.

Reflection AI logo
Member of Technical Staff - Research Software Engineer - Safety Evaluations Infrastructure
13/20Posted 2 weeks ago

Reflection AI · New York, New York County, New York

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Audit Logging
Data Pipelines
Encryption
Large Language Models
+3 more
Posted 2 weeks agoSee job

Reflection is hiring a Research Software Engineer to design and build secure infrastructure for safety evaluations, including CBRN and other dangerous-capability domains. The role involves building sandboxed execution environments, data pipelines, and tooling to support safety researchers, with a focus on security and reliability.

Reflection AI logo
Subject Matter Expert - Child Safety
14/20Posted 2 weeks ago

Reflection AI · New York, New York County, New York

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Generative AI
Python
SQL
Posted 2 weeks agoSee job

Reflection is seeking a Subject Matter Expert in Child Safety to lead our internal efforts in preventing and responding to CSAM/CSEM. You will define enforcement workflows, develop detection strategies, and ensure our open models meet safety commitments. This role involves exposure to disturbing content and requires deep expertise in child safety and trust & safety operations.

Reflection AI logo
Manager of Risk & Trust Operations
15/20Posted 2 weeks ago

Reflection AI · New York, New York County, New York

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Incident Response
Information Security
Posted 2 weeks agoSee job

Reflection is seeking a Manager of Risk & Trust Operations to translate risk governance frameworks into operational reality, overseeing commercial risk support, third-party risk management, controls assurance, AI safety program assurance, incident response, and risk issue management. This high-visibility role coordinates across product, engineering, legal, and compliance teams to ensure audit-ready risk posture.

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Get new VC-backed tech jobs in your inbox every morning.

Narrow your alert

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Reflection AI logo
Strategic Finance Manager
16/20Posted 2 weeks ago

Reflection AI · New York, New York County, New York

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Financial Modeling
Posted 2 weeks agoSee job

Reflection is a research lab making intelligence open and accessible. As a Strategic Finance Manager, you'll build financial models, support corporate financial planning, and partner cross-functionally to inform resource allocation and growth.

Reflection AI logo
Member of Technical Staff - Post-Training
17/20Posted 2 weeks ago

Reflection AI · San Francisco, San Francisco County, California

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Data Pipelines
Distributed Systems
Reward Modeling
Posted 2 weeks agoSee job

Reflection, a research lab building open AI models, seeks a Member of Technical Staff for post-training. The role involves building systems to transform pre-trained models into aligned agents, developing data pipelines, reward models, and RL algorithms, and collaborating across teams to advance model capability.

Reflection AI logo
Member of Technical Staff - Engineering Lead, Compute Platform
18/20Posted 2 weeks ago

Reflection AI · San Francisco, San Francisco County, California

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Kubernetes
NCCL
Posted 2 weeks agoSee job

Lead the Compute Platform team at Reflection, an AI research lab, to build and operate a highly available Kubernetes-based compute platform across multiple clouds. Responsibilities include team leadership, technical architecture, and hands-on engineering to support large-scale AI training runs.

Reflection AI logo
Member of Technical Staff - Data Ingestion Engineer
19/20Posted 2 weeks ago

Reflection AI · San Francisco, San Francisco County, California

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Apache Spark
Ray Framework
Posted 2 weeks agoSee job

Join Reflection, a research lab making intelligence open and accessible, as a Data Ingestion Engineer. You will build and operate large-scale data ingestion systems for pre-training, including web crawling and extraction, working closely with researchers to improve model performance.

Reflection AI logo
Technical Community & Programs Lead
20/20Posted 2 weeks ago

Reflection AI · San Francisco, San Francisco County, California

Onsite
Series B
11–50
$1B-$10B
Lightspeed Venture Partners
Artificial Intelligence
Posted 2 weeks agoSee job

Reflection is hiring a Technical Community & Programs Lead to build and own presence in developer and research communities, running programs, events, and partnerships to grow the open AI ecosystem.

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Get new VC-backed tech jobs in your inbox every morning.

Narrow your alert

Free daily email. Confirm via link to activate. Unsubscribe anytime.