Fast-Growing Startup Jobs in USA
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Looking for Fast-Growing Startup jobs in USA? Browse our curated listings with transparent salary information to find the perfect Fast-Growing Startup position in the USA area.
AI Principal Engineer
Company: Improvado
Location: USA
Posted Nov 30, 2025
Improva is an AI-powered platform for marketing teams in medium to large enterprises and agencies. It automates complex marketing intelligence and reporting to help optimize budgets, enhance campaign efficiency, and improve marketing ROI. The company is a rapidly scaling Series A startup that partners with globally recognized brands. They are looking for a hands-on AI Principal Engineer to help build the future of AI at Improvado, with a focus on defining product vision, building systems, and guiding a small team of AI engineers.
Senior Lifecycle Marketing Manager
Company: Earnest
Location: USA
Posted Nov 30, 2025
The Senior Lifecycle Marketing Manager position at Earnest involves providing senior leadership, developing customer journeys, collaborating cross-functionally, and driving engagement and retention across products. The role requires 6+ years of experience in email or lifecycle marketing, expertise in audience segmentation, and strong data analysis skills.
Senior UX Engineer
Company: Consensys
Location: USA
Posted Nov 30, 2025
Consensys is a leading blockchain and web3 software company founded by Joe Lubin, CEO of Consensys and CoFounder of Ethereum. Since 2014, Consensys has been at the forefront of innovation, pioneering technological developments within the web3 ecosystem. The company's mission is to unlock the collaborative power of communities by making the decentralized web universally easy to access, use, and build on. Consensys is looking for a UX Engineer to join the MetaMask team, focusing on building beautiful, intuitive experiences for millions of users engaging with decentralized applications and Web3 technologies.
Staff Software Engineer - iOS
Company: MyFitnessPal
Location: USA
Posted Nov 30, 2025
MyFitnessPal is seeking a Staff iOS Engineer to join their MyFitnessPal Engineering Team. The TOTS Team, which the engineer would join, plays a crucial role in driving the company's revenue growth by managing Premium subscriptions, analyzing data, and developing exclusive Premium features. The role involves collaboration, mentorship, and creating impactful solutions for the growing user base.
Software Engineering Manager - Ads Reporting
Company: Reddit
Location: USA
Posted Nov 30, 2025
The Ads Reporting team at Reddit focuses on innovation and growth, managing two workstreams to provide insights for advertisers. The Engineering Manager role involves leading teams, collaborating across departments, and ensuring technical scalability. Benefits include remote work, healthcare, and equity.
B2B Revenue Operations Manager
Company: Guidebook
Location: USA
Posted Nov 30, 2025
Guidebook seeks a B2B Revenue Operations Manager to optimize sales processes, manage CRM systems, and enhance marketing automation. The role involves cross-functional collaboration and tech stack integration, with competitive compensation and benefits.
Marketing Campaign Project Manager
Company: GrowthAssistant
Location: USA
Posted Nov 30, 2025
The job posting is for a Marketing Campaign Project Manager to oversee and coordinate multichannel campaigns, ensuring smooth execution, client satisfaction, and impactful results. The role requires strong organizational, communication, and time management skills, as well as experience managing campaigns across multiple channels.
Deputy General Counsel
Company: Truv
Location: USA
Posted Dec 01, 2025
Truv is a financial data company revolutionizing payroll account access with innovative solutions and strong backing. They seek a Deputy General Counsel to lead legal operations, shape strategy, and support growth in a dynamic, remote environment offering competitive equity and impactful responsibilities.
Staff Software Engineer - Applied AI
Company: Webflow
Location: USA
Posted Nov 30, 2025
Webflow is building an AI-native Digital Experience Platform to empower teams to design, launch, and optimize websites without barriers. They are seeking a Staff Software Engineer to join their Applied AI team to develop generative AI-powered features that enhance speed, creativity, and quality in website building and design. The role involves collaborating with product, engineering, and design teams to identify and implement AI solutions that improve the user experience.
Senior Staff Product Designer - MetaMask
Company: Consensys
Location: USA
Posted Nov 30, 2025
Consensys is a leading blockchain and web3 software company founded by Joe Lubin, CEO of Consensys and CoFounder of Ethereum. Since 2014, Consensys has been at the forefront of innovation, pioneering technological developments within the web3 ecosystem. The company's mission is to unlock the collaborative power of communities by making the decentralized web universally easy to access, use, and build on.
Performance Marketing Specialist
Company: Mercury
Location: USA
Posted Nov 30, 2025
Mercury is seeking a Performance Marketing Manager to join their team and help achieve aggressive growth goals through digital marketing campaigns. The ideal candidate should be strategic, detail-oriented, and comfortable managing execution at the tactical level. The role involves working across various platforms, launching and optimizing campaigns, and collaborating with the creative team.
Offensive Security Engineer - Agent Security
Company: OpenAI
Location: USA
Posted Nov 30, 2025
This text describes OpenAI's Security team mission and a Principal-level Offensive Security Engineer role focusing on strengthening security posture through innovative attack simulations, collaboration with defensive teams, and securing AI-powered products. The role emphasizes vulnerability hunting, automation, and influencing security strategy while requiring expertise in AI systems and offensive security operations.