Senior Backend Engineer | Series B AI Startup
Day One Partners
Day One Partners is a search firm that partners with venture capital firms to help build high-growth startups. We lead confidential searches for leadership and critical roles across a range of company stages, industries, and functions About The Role An emerging venture-backed firm is reshaping how companies coordinate internal operations and business logic. This position invites you to help architect the core systems that support real-time decisions, configurable processes, and streamlined performance, all without legacy constraints. They raised a $20M Series A and recently secured a Series B. You’ll collaborate with a focused group of engineers driving the development of a platform that enables flexible process definition, intelligent automation, and actionable insights across operational layers. Where You’ll Make an Impact: Develop services that manage adaptable data structures and logic layers across evolving use cases Implement resilient mechanisms to handle live configuration updates with traceability Build tooling that supports no-code/low-code process design and validation Enhance an execution engine tailored for responsive operations and insight generation Deliver ergonomic interfaces and libraries that abstract underlying complexity Provide full visibility and semantic search across system-wide information sets Support engineering maturity through guidance, collaboration, and shared ownership Your Experience Should Include: Working with scalable data transformation workflows involving tools like Postgres, DuckDB, or search engines Running dependable cloud-deployed systems in production Designing adaptable architectures and reusable software components Familiarly building large-scale ETL pipelines Benefits and Perks: Premium coverage for health benefits, flexible time off, and retirement options Well-resourced office setting with catered meals and relocation help if needed Be part of a mission to simplify and modernize operations infrastructure from the ground up #J-18808-Ljbffr Day One Partners
$250k
Senior Software Engineer (Python) - San Francisco, CA A fast‑growing deep‑tech startup is building AI‑powered tooling that transforms high‑level code into... ...? Building AI‑powered backend workflows and distributed... ...tooling. Backed by strong Series B funding with significant...Senior$210k - $285k
...Description Job Description Senior Backend EngineerAbout the Role... ...a Senior Backend Engineer to own and scale the... ...powering an AI-driven logistics platform... ...thrive in fast-moving startup environments, enjoy solving... ...at a high-growth Series A/B startup or as a founding...SeniorFull timeH1bRelocationVisa sponsorship- ...capital firms to help build high-growth startups. We lead confidential searches for... ...backed by a recent $18 million Series A. This team is building an AI-powered platform that helps product... ...views Collaborate with design and backend teams to deliver responsive, high-performance...SuggestedRelocation package
$250k
Acceler8 Talent is seeking a Senior Software Engineer in San Francisco, CA, to develop AI-powered backend workflows and scalable infrastructure. The ideal candidate has... ...work on cutting-edge AI infrastructure backed by Series B funding, with a competitive salary package of...Senior- A tech startup in San Francisco seeks a Senior/Staff Backend Engineer to architect and build large-scale systems for AI agents. The role focuses on developing reliable, event-driven, and scalable infrastructure, ensuring integration with LLMs while collaborating within...Senior
- ...growth healthcare technology company building AI-powered tools that improve clinical... ...nationwide. What You’ll Do Design and scale backend systems powering AI-driven healthcare... ...Bring 3+ years of professional software engineering experience Strong backend development skills...Senior
- ...ago Be among the first 25 applicants Get AI-powered advice on this job and more exclusive features. We’re looking for a senior backend engineer who can architect and scale core... ...with minimal oversight. You should have startup DNA, a product mindset, and a deep understanding...SeniorFull time
- Senior Backend Engineer (Python) This role is in office 5 days a week in San Francisco. About the role We are building voice AI for businesses and want an experienced engineer to help design, build, and maintain the systems that drive real‑time conversations. The role...SeniorWork at office
- Job Title Senior Backend Engineer Salary Not Disclosed + Equity Company Description Caplight is a seed‑stage, cash‑flow positive fintech startup in San Francisco building the "Bloomberg Terminal for... ...driven data pipelines, and build AI‑native workflows that bring transparency...SeniorLocal area3 days per week
$249k - $405k
...anything. We're building the AI that finally changes... ...We recently raised our Series B and have grown 800% over the last 12 months. Engineering at us Engineers with us... ...) at scale, and our Backend Engineers make it possible... ...working in a startup environment is preferred...SeniorContract workWork at officeRelocationVisa sponsorshipRelocation package$215k - $290k
A leading Voice AI startup is seeking a Senior Software Engineer - Backend to shape the core systems for millions of AI-driven conversations. This role involves working with real-time audio and global telephony, leading complex projects, and collaborating across teams....Senior- ...Solutions, raised a $20 million Series B funding round—bringing our... ...About the Role Reporting: VP of AI Product Location: San Fransico... ...want builders, not just users: engineers who have stood up an agentic... ...differently. 6+ years building backend systems or distributed infrastructure...SeniorWorldwideFlexible hours
$300k
A leading AI startup is seeking exceptional Backend Software Engineers to help architect, build, and scale the infrastructure behind their innovative AI systems. Candidates should have over 5 years of backend engineering experience and strong skills in languages like Python...SeniorRemote job- About Casap Casap is a Series A startup that has raised over $30M from Emergence, Lightspeed, and Primary Ventures. Based in San Francisco... ...biggest names in finance. Casap is looking for talented Backend Engineers (~10) in San Francisco excited to supercharge how banks...SeniorFlexible hours
- We're a team of ex-Googlers, startup veterans, industry and healthcare experts. We're backed... ...from a selection of executives across AI and tech: Ian Goodfellow, Gokul Rajaram,... ...Younis. We are in search of a seasoned backend engineer to build and scale up the core of our...SeniorTemporary workFlexible hours
$160k - $300k
...is a pioneering foundational AI company for physical product... ...is to revolutionize how engineering decisions are made, turning... ...together. About the Role As a Senior / Staff Backend Engineer at Apiphany, you’ll... ...equivalent) Personality & Values: Startup mindset: bias toward action,...SeniorWork at officeVisa sponsorshipFlexible hours$225k - $285k
A tech startup in San Francisco is seeking a Backend Staff Software Engineer to help scale their core platform. You will mentor engineers, establish coding standards, and drive the technical roadmap for new product ideas. Candidates must have over 5 years of experience,...Senior- ...Dataset You'll be our eleventh engineering hire. You'll have full... ...points: Previously founded a startup. Extra bonus for a dev-tools startup... ...at “figuring it out”: Recall.ai is a low-structure, high-trust... ...revenue over 12x and raised our Series A In 2024 we grew revenue over...Immediate start
$244k - $292k
...Why Kikoff: This is a consumer fintech startup, and you will be working with serial... ...life real‑customer impact. About Fynn (AI Credit Coach) Fynn is Kikoff's AI credit... ...what it can become. We're looking for a Senior Backend Engineer to help take Fynn from a powerful...SeniorContract workWork at officeLocal areaImmediate start$192k - $240k
Overview Brex is the AI-powered spend platform. We help companies... ...thousands of companies from startups to enterprises — including... ...efficiency on a global scale. Engineering at Brex Engineering at Brex... ...building and designing scalable backend systems Experience working...SeniorWork at officeRemote workWork from home$195k - $225k
...We're well-funded (Series B $51m to date), growing... ...expanding the core engineering team in SF. The surface... ...Role As the Senior Product Engineer... ...closely with designers, AI engineers, and backend leads to make Vizcom... ...and/or in a startup environment ~ Bonus...SeniorRemote work$170k - $240k
...Today, our academic search engine helps 8 million... ...reviews 10x faster. Our Series A was led by USV, with... ...participation from top AI investors, including Nat... ...exciting and important AI startups. Our mission is to empower... ...of research. Role: Backend, Search Team. You will...$210k - $240k
Postman is seeking a high-ownership infrastructure engineer in San Francisco to enhance their backend infrastructure, focusing on time-series network traffic. The role requires 7+ years of experience and involves collaborating with teams to address technical challenges...SeniorFlexible hours$500 per month
...About Giga Giga has recently raised a $61M Series A and is working with Fortune 500... ...generation of customer experience—real‑time AI agents that can understand emotion, resolve... ...companies. The Role We’re looking for backend engineers to build the infrastructure and systems...Senior- ...client is building the AI backbone for the next generation... ...help fast-growing AI startups design, fine-tune,... ..., but a full-stack backend for fine-tuning, reinforcement... .... Their customers are Series A-C AI companies... ...hiring a Backend Software Engineer (ML Infrastructure) to...Remote work
$290k - $400k
Job Title Staff Backend Engineer Salary $290K-$400K + Equity Company Description Giga is a $61M Series A voice AI startup building superintelligent agents that handle complex enterprise customer workflows for leaders like DoorDash. Job Description As a Staff Backend...- ...Description Job Description Our client, a fast-growing AI B2B education startup, is hiring a Founding Backend Engineer to own and lead the core systems that make their... ...at a Tier 1 venture-backed startup (ideally Series A to C but flexible) ~ Strong technical depth...Immediate startFlexible hours
- Job Title Senior Backend Engineer Hiring Location San Francisco, USA Company Description Casa is a $27M Series A startup building the operating system for homeownership, backed by Forerunner Ventures, Sandberg Bernthal Venture Partners, and Travis Kalanick. Job Description...SeniorRelocation
$210k - $240k
...ownership, product‑oriented infrastructure engineer to help us scale our product to... ...’ll do Design, build, and scale our backend infrastructure to process time‑series network traffic, at large scale, in real‑time. Build and maintain AI algorithms to analyze time‑series...SeniorTemporary workFlexible hours$200k - $260k
...site in San Francisco, CA Are you a senior backend engineer who takes pride in building... ...to join a fast-growing, profitable startup at the forefront of AI infrastructure, building the compliance... ...company before they raise their Series A, this is an outstanding opportunity...Senior
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