Senior Software Engineer
Valid
About Valid Valid is one of the fastest-growing AI-native marketing companies. We’re building the company that replaces the traditional marketing agency. We help brands grow across Meta, TikTok, Google, and TV by combining software, AI agents, creative production, and media buying into a single system. Every day, we launch, measure, and iterate on advertising campaigns at a speed that traditional agencies can’t match. Our team operates at the intersection of AI video, filmmaking, performance marketing, and engineering. We believe the future of marketing isn’t people or AI, it’s people working alongside AI systems to produce better work, faster. The model is already working. Valid manages more than $40M in annualized advertising spend and partners with some of the fastest-growing consumer and technology companies, including Replit, Rover, Tolan, and others. Since launching, we’ve consistently won head-to-head against incumbent agencies by delivering better performance and moving faster. Backed by Canaan, Neo, Steve Huffman, Scott Banister, and other leading investors and operators, we’re building the next generation of marketing. This Role Is for You If You're: Experienced in architecting and implementing high scale and throughput systems Accomplished in leading projects that develop and deliver game-changing products Proactive in identifying opportunities to meet and exceed your team's objectives while growing your own career Passionate about mentoring early-stage engineers Driven by the opportunities and challenges afforded by early-stage, high-growth startups Senior Engineer in a Nutshell You're an engineering leader who understands what needs to be done for you and Valid to reach ever-increasing levels of greatness. You thrive on seeing the forest through the trees — you identify the greatest challenges and bottlenecks and purposefully execute against them. As needs dictate, you fluidly transition between contributing both as an individual as well as a key member of a larger technical team. Key Qualifications Experience: 4+ years software engineering experience with focus on system architecture of large-scale, performant distributed systems Technical Leadership: Experience leading technical projects, coordinating execution of small engineering teams, and setting engineering standards in an agile environment Engineering Excellence: Mastery in Python (our day-to-day operating language) and a second-nature commitment to engineering best practices (e.g., CI/CD, testing, fault-tolerance) Cloud and Infrastructure: Hands-on experience managing and deploying cloud platforms (e.g., AWS, Google Cloud) and orchestration tools (e.g., k8s, Docker) Nice to Have 1+ years in adtech or martech engineering in a senior capacity 2+ years in early-stage (pre-Series B) startups Exposure to AI and machine learning platforms/APIs, frameworks (e.g., TensorFlow, PyTorch), and algorithms What We Offer Salary: We strive to make offers in the 90th-plus percentile of similar stage/trajectory companies for the level offered Equity: Generous grants commensurate with experience Benefits: 401k, healthcare, FSA, meals (when in-person) Workplace: Remote-possible with a preference for IRL in our San Francisco headquarters Impact: A foundational opportunity to revolutionize the landscape of digital advertising, forever Growth: Active support in growing your career, skills, and outcomes in tandem with the growth of our business Culture: A mission-driven organization where contributions are honored, diversity in experience and background is recognized, and disruption is core to everything we pursue You're Probably a Good Fit If: Applying the latest tech in novel ways to delight customers excites you, and your goal is to maximize ownership You want to join something early-stage and can thrive in an environment of organized chaos: Organized: Build with purpose, work efficiently, communicate clearly, especially in writing. Chaos: We think the best place to learn is in market and will do what it takes to ship as quickly as possible. This Role Might Not Be a Fit If: You don't enjoy wearing multiple hats You don't enjoy mentoring others You dislike navigating ambiguity #J-18808-Ljbffr
- ...optimizing for both write throughput and in-memory footprint for each agent. What we’re looking for 7+ years of experience as a software engineer. Consistent record as primary individual contributor to several medium to large projects. Managed, designed and deployed...Senior
$170k - $230k
...Senior Software Engineer Andy B Test Job 001 – Senior Software Engineer Required experience: creating LinkedIn RSC integrations in Applicant Tracking Systems. Location San Francisco, CA Salary Ranges $170,000.00 - $230,000.00 (1 month ago) $209,500.00 - $246,500.00 (2...SeniorFull time$148k - $185k
...A leading transportation company in San Francisco is seeking an experienced software engineer to help innovate within their team. This role involves establishing roadmaps and architectures, writing maintainable code, and leading projects to execution. Candidates should...Senior- ...Overview Endeavor is real-world enterprise AI. Our software is the distribution layer for powerful AI models that will build the... .... We will win. And we work really hard to win. The Role Senior Software Engineer at Endeavor, you will design and build the core systems that...Senior
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- ...effectively. Become a critical member of the team that is responsible for the success of the product. Take on additional responsibility as a senior member of Valence’s team. Take the product to scale with dozens of Fortune 1000 companies and thousands of users. Restrictions...SeniorRemote work
- ...training data effective Support new product lines as we expand beyond coding environments You’ll work with The founding team, a founding engineer, and a small group of engineers. You will have direct access to AI researchers at frontier labs. Tech stack Typescript, React,...SeniorRelocation package
- ...As a Senior Software Engineer, Infrastructure and Platform, you will design and build the core infrastructure that powers data generation, evaluation, and agentic systems. You will be responsible for the shared platforms that enable engineers and research teams to run...Senior
$250k - $350k
...Stage Equity About the Role An early-stage startup, growing exceptionally fast with a small and talent-dense team, is hiring Senior Software Engineers to build and own core product from the ground up. The team is small, senior, and moving quickly. This is a rare chance to...Senior3 days per week- ...A fast-growing SaaS company based in San Francisco seeks a Software Engineer for its New Products team. This hybrid role requires building first-of-its-kind technology that transforms an analog industry and improves lives. Candidates should have 5-10+ years of backend...Senior
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- ...What you'll do in the role: Build our Product. Own and implement software features that help to power our AI platform helping private... ...standards, architectural patterns, and review processes; mentor engineers. Co‑own our culture of practical, reliable, and test‑driven...Senior
- ...Founding Member of Technical Staff — RL Environments & Platform Engineering We're partnering with a fast-growing, well-funded AI startup... ...realistic, long-horizon, and difficult for frontier models Build software to 10–100x the quality and throughput of RL environment...Senior
- ...About the Role As a Senior Engineer at Magical, you'll build and own the systems powering our AI agents. You'll set technical direction for... ..., and iteration You May Be a Fit If You have 5+ years of software development experience. You’ve built and owned backend systems...SeniorWork at office
- ...have the opportunity to develop and deploy tomorrow’s hardware & software solutions and help revolutionize logistics. Responsibilities... ...to testing, and deployment. Work closely with our product and engineering teams, owning a large part of the process from problem...Senior
$150k - $190k
...products. We believe that oddsmaking is a challenge rooted in engineering, mathematics, and sports betting expertise; not intuition. We'... ...standards and global scale Preferred Production experience with Software Engineering at a global level Interest or experience in Rust...Senior- ...We’re looking for a Senior Software Engineer that will be a valued team member responsible for the design and implementation of our client’s product. Our client is the world’s largest website optimization platform, currently a series C start up, they boast an enviable...SeniorWork at office
- ...better AI outcomes, which means better search and automations. An engineer who builds in isolation here will build the wrong thing. You\'... .... Who you are 3-5 years of experience building and shipping software, preferably at startups. You\'ve made real decisions, not just...Senior
- ...Senior Product Engineer – San Francisco Based Opportunity We’re partnering with a Series A client that is transforming accounting and finance... ...an opportunity to join a team at the forefront of AI‑driven software development and help shape the future of human‑software interaction...SeniorWork at office
- ...We are seeking versatile Sr Software Engineers who specialize across multiple disciplines - Machine Learning, Data Engineering, and Full-Stack Development. The ideal candidate is willing to get their hands dirty, push boundries, and driven by a need to succeed. You will...Senior
- ...in June 2026. What will you do Work with the product team to translate customer requirements into highly scalable and maintainable software architecture Use AI coding agents and internal tooling to deliver new features and improve existing code Own one or more of Sela’s...SeniorWork at officeRemote workFlexible hoursNight shift
- ...Fonzi Match Day is where full stack engineers who actually build things meet the companies worth building for. No job boards. No recruiter spam. Companies request to interview you and submit salary bids upfront. Every week, hiring managers at 100+ pre‑vetted startups in...Senior
- ...out of our office in SOMA. As an early engineer, you will be a true owner of your work,... ...least 4 years of professional full-time software development, including at least one 2 years... ...technical challenge (waived for very senior candidates) 45-min live-coding interview...SeniorFull timeWork at office
$225k - $405k
...Engineering at Ivo An AI agent that lives in MS Word and edits the document for you [2023] Ditching imprecise embeddings models in favor... ...customer actually cried when we showed her this) [2025] Role Our Software Solves All These Problems (and More) At Scale, And Our Backend...SeniorContract work- ...About the Role This is a high-impact opportunity for a backend engineer to join as an early member of a deeply technical, high-performance... ...in a highly autonomous environment Collaborate closely with senior engineers and technical leadership What You’ll Bring Strong computer...SeniorFull timeImmediate start
$230k
...Senior Software Engineer | San Francisco | AI/Customer Experience | Up to $230K + equity We are working with a YC‑backed start‑up in the AI space that helps customer experience teams level up performance through automated coaching. Your role will involve taking ownership...Senior- ...are using it, and we’re now focused on making Dispatch dramatically smarter and more capable. The Role We’re looking for senior software engineers to help us realize TruckSmarter’s vision of eliminating inefficiencies across the freight industry. You’ll be at the forefront...SeniorWork at officeFlexible hours
$200.45k - $260.59k
...Job Summary As a Senior Software Engineer on the Pilots team within the Perception organization, you will be responsible for developing prototypes for forthcoming pilots, aligning with Hayden’s mission and long-term roadmap for business expansion. This team investigates...Senior$210k
...Overview Senior Software Engineer - Voice AI - SF (Onsite) A fast-growing AI startup building voice and communication infrastructure for enterprise financial services is looking for a hands-on Senior Software Engineer to help scale real-time AI systems powering millions...Senior
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