Were looking for talented and experienced C/C++ Linux developers, who can do a lot and want to learn even more. As a part of our team youll be developing the fastest open source software, investigate and fix sophisticated performance issues on powerful Linux servers and talk on top technical conferences.

Youll develop performance and scalability extensions of MySQL/InnoDB (e.g. we madeMariaDB System Versioning), the Linux kernel, Nginx and other popular open source projects. Youll also analyze the performance of heavily loaded large Linux systems and make them even faster.

Youll be able to talk at major international conferences about the Linux kernel and databases at will.

Required skills:

• Fluent C and good C++ or willingness to learn C++
• Deep understanding of the Linux kernel
• Good knowledge of classic algorithms and efficient data structures
• Experience with multithreading (POSIX threads, C++ STL)

Good to have:

• Experience in the Linux kernel development (kernel/, mm/, net/, security/)
• Some experience with Python to develop functional testing scripts
• Experience in the networking area (IPv4, IPv6, TCP, TLS, QUIC, HTTP)
• Understanding how modern hardware (x86-64 CPUs, network adapters and disks) work
• Experience with Rust or willingness to learn the language

Please send your CV and cover letter athk@tempesta-tech.com.

About Tribe AI:

At Tribe, were on a mission to help enterprises realize the value of AI for their business. Every large enterprise wants to use AI to transform how they operate but many dont have the capabilities to do it. That gap is our opportunity.

Were an AI-native services company that helps enterprises build and deploy best-in-class AI products that deliver real business impact. We partner closely with OpenAI and Anthropic, giving us rare visibility into the most advanced models, roadmaps, and GTM strategies in the world.

About the Role

Were looking for a Forward Deployed AI Architect to lead our most mission-critical client engagements. This isnt a back-office architecture role. Youll be in the field – shoulder-to-shoulder with clients – designing end-to-end AI systems, setting technical direction, and ensuring that what we build actually works in the real world.

Youll be equal parts technologist, strategist, and translator: dropping into the weeds when systems need unblocking, stepping up to the balcony to shape client strategy, and always keeping focus on the only thing that matters – building technology that solves the most important problems for our customers.

Key Responsibilities:

Technical Leadership

• Drive technical discovery with clients: understand environments, constraints, and the realities of dynamic enterprises.

• Design AI/ML architectures that balance speed, reliability, and cost – but never at the expense of outcomes.

• Provide architectural guardrails while enabling engineers to move fast and adapt in the field.

Client Engagement

• Act as the forward-deployed face of technical leadership, tailoring communication from engineers to C-levels.

• Teach and enable client teams by turning complexity into clarity.

• Influence decision-making by linking technical choices to business wins.

Delivery & Enablement

• Guide engineers through execution without smothering them in process.

• Translate client-specific solutions into reusable patterns that strengthen our platform.

• Share insights across the company, raising the bar for future deployments.

About You:

• 8+ years designing and delivering complex software systems, with strong AI/ML depth.

• Proven experience as a technical lead or architect in high-stakes, enterprise environments.

• Mastery of the AI development lifecycle: from messy data ingestion to model deployment and monitoring.

• Ability to engage credibly across audiences – engineers in the trenches, executives in the boardroom.

• Background in consulting or client-facing engineering roles where outcomes mattered more than process.

• Systems thinker with a missionary mindset: youre here to win, not to optimize for your next job.

Why Join Us:

• Impact: Lead the design of AI systems that move the needle for global enterprises.

• Exposure: Work across industries on problems that rarely have playbooks.

• Enablement: Build not just solutions, but client capabilities that outlast your engagement.

• Culture: Join a team that prizes creativity, resilience, and the primacy of winning over process.

• Growth: Stretch yourself – real growth is painful, nonlinear, and career-defining.

About Kastle

Kastle is building the AI operating system for consumer lending. We partner with some of Americas largest mortgage lenders to transform their contact centers and compliance operations with AI voice agents.

Backed by Y Combinator, Commerce Ventures, and executives from Snapdocs, Google, and WePay, were redefining how millions of borrowers interact with financial institutions.

This is a rare chance to join at the ground floor of a company already plugged into large-scale customers and real production use cases.

Role Overview

We are looking for a part-time AI Trainer with experience operating phones in the mortgage industry. You will help improve our AI system by providing feedback on conversations, annotating data, and testing for quality. If you have worked as a customer service or collections agent for a mortgage servicer, this role is a great fit to use your knowledge to train AI in real-world scenarios.

Responsibilities

• Annotate and label data from mortgage-related conversations.

• Give feedback on AI responses to make them more accurate and helpful.

• Train the AI system to handle mortgage servicing phone calls better.

• Test the AI for issues, including response quality, customer experience, explanation quality, and realism.

• Work ~10 hours per week on flexible schedules.

Requirements

• 5+ years a customer service agent for a mortgage servicing company.

• Knowledge of the mortgage industry, including escrow, payment questions, loss mitigation calls, QRPC requirements, servicing transfer questions, and customer conversations.

• Strong attention to detail and communication skills.

• Reliable internet and computer for remote work.

Preferred Qualifications

• 3+ years as a Mortgage Customer Service Supervisor.

• Familiarity with giving feedback to customer service agents.

Benefits

• Flexible part-time hours.

• Opportunity to shape cutting-edge AI technology.

• Work from home.

Join the Future of Commerce with Whatnot!

Whatnot is the largest livestream shopping platform in North America and Europe to buy, sell, and discover the things you love. Whether it’s trading cards, fashion, electronics, or live plants, our sellers are building real businesses across hundreds of categories. We’re building live commerce at a scale that’s never been done in the West, and there’s no playbook to copy. The people here are shaping how an entirely new industry develops.

As a remote co-located team, we’re inspired by our values and anchored in hubs across the US, UK, Ireland, Poland, Germany, and Australia. We move fast, stay close to our users, and focus on the work that drives the most impact.

We’re one of the fastest growing marketplaces and were recently named the #1 Best Startup Employer in America by Forbes. Check out the latest Whatnot updates on our news and engineering blogs and join us as we enable anyone to turn their passion into a business and bring people together through commerce.

Role

We are looking for an experienced platform policy leader to shape and evolve Whatnots global policies and frameworks across trust and safety, marketplace integrity, and commerce, with a focus on Europe. You will help define how Whatnot protects buyers, supports sellers, and scales responsibly by designing policies that are clear, principled, and built to last.

This role is a great fit if you are a builder who is comfortable operating in ambiguity and sees grey space as an opportunity to define clear direction. You are energized by novel problems without established playbooks or industry norms, and motivated to shape how complex trade-offs are approached. You enjoy influencing outcomes through thoughtful reasoning and steady judgment.

As Head of European and UK Policy, youll:

• Author and evolve global policies and frameworks across commerce, buyer and seller protections, fraud, and trust and safety. Draw clear, principled boundaries in complex or ambiguous areas to strengthen consistency and durability as the platform scales. Ensure policy design, operational enforcement, and user-facing guidance remain tightly aligned.

• Leverage data, trend analysis, and structured problem solving to identify emerging risks, pressure-test policy proposals, and evaluate downstream operational impact.

• Apply a European lens to global policy development by tracking emerging trends and evolving user expectations, proactively strengthening frameworks to reflect cultural nuance and reinforce clarity and trust.

• Resolve escalated or unclear policy questions, providing principled recommendations and framing trade-offs for cross-functional and senior stakeholders.

We offer flexibility to work from home or from one of our global office hubs, and we value in-person time for planning, problem-solving, and connection. Team members in this role must live within commuting distance of our Dublin, Ireland hub, London, UK hub or Berlin, Germany hub. Periodic travels to the U.S. will be required.

You

People who do well at Whatnot tend to be comfortable figuring things out as they go, biased toward action, and genuinely curious about what they’re building. They care more about outcomes than credit and stay close to the product and the people using it.

As our next head of Europe and UK Policy, you should have meaningful leadership experience shaping trust and safety, marketplace, or platform governance policy and frameworks at a technology or ecommerce company, plus:

• Strong policy judgment and comfort operating in ambiguous or fast-evolving environments

• 7+ years of experience working across multiple regions or markets where consistency and local nuance must be balanced

• Fluency in modern AI tools, including large language models, with experience using them thoughtfully to improve policy development, analysis, and operational leverage.

• Strong communication skills, including the ability to articulate policy rationale and tradeoffs clearly

• A structured, systems-oriented approach to reducing ambiguity and improving governance clarity

Benefits

• Generous Holiday and Time off Policy

• Health Insurance options including Medical, Dental, Vision

• Work From Home Support

  • Home office setup allowance

  • Monthly allowance for cell phone and internet

• Care benefits

  • Monthly allowance for wellness

  • Annual allowance towards Childcare

  • Lifetime benefit for family planning, such as adoption or fertility expenses

• Retirement; 401k offering for Traditional and Roth accounts in the US (employer match up to 4% of base salary) and Pension plans internationally

• Monthly allowance to dogfood the app

  • All Whatnauts are expected to develop a deep understanding of our product. We’re passionate about building the best user experience, and all employees are expected to use Whatnot as both a buyer and a seller as part of their job (our dogfooding budget makes this fun and easy!).

• Parental Leave

  • 16 weeks of paid parental leave + one month gradual return to work *company leave allowances run concurrently with country leave requirements which take precedence.

EOE

Whatnot is proud to be an Equal Opportunity Employer. We value diversity, and we do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, parental status, disability status, or any other status protected by local law. We believe that our work is better and our company culture is improved when we encourage, support, and respect the different skills and experiences represented within our workforce.

• Location:Remote / Virtual
• Job Type:Full-Time

AtHireHawk,weconnecttopglobaltalentwithhigh-performingU.S.companies.Ourfocusisonfindingexceptionalprofessionalswhobringbothexpertiseanddrivetoeveryrole.Werepassionateabouthelpingcandidatesgrowtheircareerswhilesupportingourclientswithreliable,remote-readytalentthatmakesanimpactfromdayone.

We are seeking a Senior Ecommerce Creative Strategist to lead the development of high-performing creative strategies that drive revenue and customer acquisition across ecommerce channels. This role combines creative direction, performance marketing insights, and ecommerce expertise to build campaigns that convert across paid media, landing pages, and product experiences.

The ideal candidate understands direct response creative, consumer psychology, and ecommerce growth levers, and can translate performance data into scalable creative strategies.

Responsibilities:

• Develop and execute data-driven creative strategies for ecommerce campaigns across paid social, display, and video platforms.
• Lead the ideation and development of high-converting ad creatives including UGC, static ads, video scripts, and landing page concepts.
• Translate performance insights into scalable creative frameworks and testing roadmaps.
• Partner with growth marketing, media buying, and analytics teams to align creative with performance objectives.
• Analyze campaign performance to identify creative trends, winning angles, and new testing opportunities.
• Optimize messaging, hooks, and visual storytelling based on audience insights.
• Provide clear creative briefs and direction to designers, copywriters, video editors, and content creators.
• Review creative outputs and ensure they meet brand standards and conversion goals.
• Oversee the creative testing pipeline, ensuring continuous iteration.
• Support the development of high-converting landing pages and product pages.
• Collaborate with CRO teams on offer positioning, product storytelling, and funnel optimization.
• Align creative messaging with customer journey stages.
• Conduct competitive research, audience research, and trend analysis to inform creative direction.
• Identify emerging creative formats and platforms relevant to ecommerce growth.

• 2+ years of experience in creative strategy, performance marketing, or ecommerce growth
• Proven success developing high-performing paid media creatives
• Deep understanding of direct response marketing and ecommerce funnels
• Experience working with Meta, TikTok, YouTube, or other paid social platforms
• Strong analytical mindset with the ability to interpret performance data
• Excellent communication and leadership skills
• Experience in DTC ecommerce brands or agencies
• Familiarity with CRO and landing page optimization
• Experience managing creative teams or freelance creators
• Knowledge of UGC production and influencer content strategies

• Access to a$200K+ perk marketplacewith discounts on 150+ global services.
• Option towithdraw up to 50% of approved earningsbefore payday.

Join the Future of Commerce with Whatnot!

Whatnot is the largest livestream shopping platform in North America and Europe to buy, sell, and discover the things you love. Whether it’s trading cards, fashion, electronics, or live plants, our sellers are building real businesses across hundreds of categories. We’re building live commerce at a scale that’s never been done in the West, and there’s no playbook to copy. The people here are shaping how an entirely new industry develops.

As a remote co-located team, we’re inspired by our values and anchored in hubs across the US, UK, Ireland, Poland, Germany, and Australia. We move fast, stay close to our users, and focus on the work that drives the most impact.

We’re one of the fastest growing marketplaces and were recently named the #1 Best Startup Employer in America by Forbes. Check out the latest Whatnot updates on our news and engineering blogs and join us as we enable anyone to turn their passion into a business and bring people together through commerce.

Role

As a Partnerships Manager, youll focus on growing the seller communities as we launch into Japan.

• Build our seller community

  • Source and reach out to sellers to convince them to join and grow their business on Whatnot. Leverage social media, outbound channels, and in-person events

  • Partner with top sellers and strategic partners to build big businesses on Whatnot

  • Be the go-to advisor for our sellers, educating and coaching them on ways to grow their businesses on Whatnot. Create the next generation of top sellers in your category

  • Stay close to sellers and buyers in the ecosystem to understand user needs and provide the product team with key user insights and problems to solve.

• Create community-defining moments

  • Spearhead diverse marketing initiatives, such as influencer partnerships, to boost brand awareness and attract more buyers

  • Organize and execute on-app events connected to the most exciting products, moments, and fandoms related to your category

• Use data and strategic thinking to propel your category forward

  • Utilize large sets of data efficiently in order to inform category & country plans, as well as track and report on outcomes

  • Be able to jump in, ramp up quickly, and independently drive strategic projects both in your own category and across partnerships when needed

You

People who do well at Whatnot tend to be comfortable figuring things out as they go, biased toward action, and genuinely curious about what they’re building. They care more about outcomes than credit and stay close to the product and the people using it.

As our next Partnerships Manager, you should have:

• 6+ years of mixed experience working in a fast-paced, client-facing role in high output environments, such as: Strategy Consulting, Private Equity, or partnerships at a fast-paced tech company

• Experience working in a business development or partner-facing role

• You are scrappy and flexible enough to work in an ambiguous environment with limited guidance

• You are a problem solver with strong project management skills and the ability to fully own strategy and execution on both sides of an emerging marketplace

• You have business acumen, are deeply analytical, and comfortable understanding and manipulating data to gain and take action on business insights

• You speak fluent English and native Japanese

We offer flexibility to work from home or from one of our global office hubs, and we value in-person time for planning, problem-solving, and connection. Team members in this role must live within commuting distance of our Tokyo hub.

Nice to Have

• Experience at a high-growth startup, marketplace, or creator-focused platform

• An existing network of sellers, creators, and influencers within a Whatnot product category.

• Proficiency in SQL

• Passion for creator communities and/or expertise in existing Whatnot product categories (e.g. vintage clothing, collectibles).

• Experience buying and selling in online marketplaces.

Benefits

• Flexible Time off Policy and Company-wide Holidays (including a spring and winter break)

  • Health Insurance options including Medical, Dental, Vision

  • Work From Home Support

• 140,000 home office setup allowance

• 20,750 monthly allowance for cell phone and internet

• 69,500 monthly allowance for wellness

• 14,000 monthly allowance for commuter expenses

• 693,000 annual allowance towards Childcare

• 2,772,000 lifetime benefit for family planning, such as adoption or fertility expenses

• 16 weeks of fully paid parental leave + one month gradual return to work (in addition to any local statutory leave allowances. Company leave allowances run concurrently with country leave requirements which take precedence).

• Pension plans

Please find our Whatnot Candidate Privacy Notice here.

EOE

Whatnot is proud to be an Equal Opportunity Employer. We value diversity, and we do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, parental status, disability status, or any other status protected by local law. We believe that our work is better and our company culture is improved when we encourage, support, and respect the different skills and experiences represented within our workforce.

About Us

Office Hours is an on-demand expert network that connects leading organizations with trusted experts across various knowledge domains. Experts earn income by sharing their knowledge through advisory work, projects, and AI model training. Our platform handles the complexities behind the scenes screening, compliance, scheduling, and paymentsso knowledge sharing stays focused on meaningful insights and real impact.

Were a hyper-growth and profitable company, quickly expanding our expert network, launching new offices, and new products. We are headquartered in San Francisco, with offices in Brooklyn and Bangalore. Our customers include the fastest-growing digital health companies, technology companies, institutional investment firms, consulting firms and AI Labs. We are backed by top marketplace investors and operators of companies like DoorDash, Airbnb, Affirm.

What we believe

Human knowledge is the worlds most valuable asset. And yet, despite being more interconnected than ever, most knowledge still remains stuck in our heads, inaccessible and underutilized. Our vision is to make human knowledge easily accessible and infinitely scalable by building tools for the new age knowledge economy.

About the role

At first glance, Office Hours looks simple: search, match, connect, and pay. Under the hood, the system is anything but.

Were building and evolving a deeply interconnected platform spanning search, discovery, recommendations, data pipelines, logistics, payments, compliance, and performance. The entire stack has been built in-house, from expert profiles and discovery experiences to workflow automation and an underlying knowledge graph that ties everything together.

Were looking for a Staff Full Stack Software Engineer who enjoys working across the stack, takes ownership of complex problems, and cares deeply about building thoughtful, high-quality product experiences. This is a hands-on role with real influence over product direction, technical architecture, and how we ship software.

What youll do

• Own the design, implementation, and rollout of meaningful user-facing features, from problem definition through production

• Partner closely with design, product, and client-facing teams to translate real user needs into shipped solutions

• Architect, build, and evolve scalable, reliable systems across the front end, back end, and infrastructure

• Set a high bar for code quality through clear implementations, thoughtful tradeoffs, and active participation in reviews and technical discussions

• Explore and integrate modern tools, including AI-powered workflows, and share learnings that improve how the team builds and ships

What you bring

• 8+ years of professional software engineering experience, with meaningful time spent working across the stack

• A track record of shipping high-quality, user-facing products in production environments

• Strong product intuition and the ability to translate ambiguous user or business problems into technical solutions

• Comfort operating in fast-moving environments where priorities evolve and ownership matters

• A bias toward action, paired with sound judgment and attention to detail

Our tech stack

• Back end: Node.js, Typescript, MongoDB & Postgres, OpenSearch, Temporal

• Front end: React, Next.js, Tailwind, shadcn

• Infrastructure: AWS, Kubernetes, Docker, Datadog, Sentry

• Workflow: GitHub, Slack, Notion, Figma, Linear, PostHog, Metabase

Benefits + Perks

• Competitive salary and equity

• Medical, dental, and vision coverage

• 401(k)

• Monthly wellness and fitness stipend

• Paid time off policy, along with company holidays

• Annual company off-sites (Tahoe, Mendocino, Mexico City, San Diego, Park City)

• Parent-friendly policies, remote flexibility, and paid family leave

Pay Transparency Notice

Full-time offers include base salary, equity, and benefits.

Pay range: $225,000- $250,000 based on seniority and relevant experience

*This role can be 100% remote, but we do have offices in San Francisco and NYC

Dont meet every single requirement? Studies have shown that some candidates, especially underrepresented groups such as women and people of color, are less likely to apply to jobs unless they meet every single qualification. At Office Hours we believe in building a diverse and inclusive workplace, so if youre excited about this role but dont meet every qualification in the job description, we still encourage you to apply. You could still be the right candidate for this or other roles at Office Hours!