Founding Backend Engineer APIs, Data & Infra
Jack & Jill
Casa is seeking a founding Senior Backend Engineer in San Francisco to design and build the core backend APIs and infrastructure powering a high-touch home-management platform. You will work with ex-Uber founders to shape the architecture of a growing startup, crafting data models for home inventory and digital twins, and ensuring performance and reliability across the backend stack. This is the first backend hire in a venture-backed venture. #J-18808-Ljbffr Jack & Jill
$150k - $250k
AgentMail (YC S25) is seeking a Founding Engineer in San Francisco to design intuitive APIs and architect high-performance systems. This role requires prior engineering experience and a proven ability to ship software used by real users. The compensation package includes...Suggested- Casa is seeking a founding Senior Backend Engineer in San Francisco to lead the development of robust backend systems and define the culture of our engineering team. You will design and optimize APIs, ensuring scalability and reliability as we grow our member base. If you...Suggested
- ...progress. We’re a team of researchers, engineers, academics, and builders from places... ...of scalable, high-performance real-time data and API infrastructure. In this role, you’ll architect... ..., stream processing, and scalable backend architecture Proven ability to design...SuggestedPermanent employmentWork at office
- Instant is seeking a Founding Backend Engineer to join their team in San Francisco, focusing on building infrastructure for a database company. The role involves tackling complex backend challenges such as managing high connection volumes and enhancing system capabilities...Suggested
$150k - $300k
Compound AI seeks exceptional backend engineers in San Francisco to build the data pipelines that drive its AI agents. You will work directly with the founding team to integrate diverse financial data sources, ensuring precise query performance. The ideal candidate has...Suggested- A leading AI solutions provider is seeking an experienced Backend Software Engineer in San Francisco. The role involves building backend APIs and a web application powered by advanced machine learning algorithms. Candidates should have a CS degree from a top university,...Work at office3 days per week
$180k
...On-site Department Product and Engineering Clipbook’s mission: reinvent... ...'ll Do Architect & build core backend systems. Drive architectural decisions... .... Firestore for client-facing data needs), so we value a... ...and more. Develop performant APIs and services. Create robust interfaces...Full timeWork at office- David AI is seeking a Software Engineer to design APIs, build scalable services, and maintain performant systems handling vast audio data. The ideal candidate has over 3 years of backend development experience, is proficient with RESTful APIs, and has strong skills in distributed...
- ...cutting-edge startup in San Francisco, is seeking a seasoned founding engineer to lead the design and development of their Telemetry Data Management Platform. In this pivotal role, you will develop scalable backend systems, integrate with open technologies like...
$192k - $260k
...obsessed with enabling data teams to solve the... ...own missions. Founded in 2013 by the... ...in the world. Our engineering teams build highly... ...software engineer with a backend focus, you will... ...with cloud APIs (AWS, Azure, CloudFormation... .... Core Infra: Build the core infrastructure...Work at officeLocal areaFlexible hours$50k
A dynamic AI startup in San Francisco is seeking a founding full-stack engineer to own the application layer of their platform. The role involves building user-facing dashboards, designing APIs, and leading architectural decisions. Ideal candidates will have experience...- ...We’re looking for a seasoned backend engineer to own key data, search, AI, and core backend infrastructure... ...domains (core-product, search, data-infra) A mastery of python (and at least a... ...users Early-stage startup experience or founding experience Side projects, papers, etc...
- ...Novaflow Novaflow is the AI data analyst for biology labs. Analytics... ...San Francisco office. The founding team works side by side... ...Responsibilities Build and maintain APIs and backend services in Python, Go, or... ...Help build the engineering team and establish how we work...Work at office
- A technology company in San Francisco is looking for a Backend Engineer (Infrastructure) to develop core systems and infrastructure. You will design scalable systems and collaborate closely with product engineers and AI researchers. The ideal candidate has a Bachelor's...
- Amplitude is seeking a Senior Software Engineer to tackle complex infrastructure challenges, designing for extreme throughput and building... ...Product and partner engineering teams to develop innovative backend solutions. The ideal candidate should have a strong background...
- Amplitude is looking for a Software Engineer to join their infrastructure team in San Francisco. This role involves taking... ...from ideation to production, designing reliable backend services, and optimizing data infrastructure. Candidates should have 5+ years in Software...Flexible hours
- A pioneering AI research lab in San Francisco seeks a core engineer to build and scale its data infrastructure from day one. You'll work with cutting-edge technology in a founding role, responsible for developing data pipelines and workflows across web and desktop. The...
$140k - $190k
Loft Orbital is looking for a Backend Engineer to join our Data Management Services (DMS) team. DMS owns the... ...Implement and improve data pipelines and APIs with a strong focus on data... ...and cultures. Who We Are: Who We Are: Founded in 2017, Loft provides governments, companies...Local area$140k - $180k
...an early-stage AI Startup, is hiring a Founding Engineer to join their team in San Francisco. The... ...that allows autonomous agents to interpret data and taking action across sources ranging... .... ~Develop secure, well-designed APIs to enable access to enriched data across...Permanent employment- ...San Francisco, is seeking a founding senior software engineer to join a small team... ...systems. You will own key backend components, interact with customers... ...the product with real-time data streaming and CDC at its... ...Kafka, Kubernetes, and cloud infra is a plus. #J-18808-Ljbffr...
$240k - $270k
Sigma Computing, located in San Francisco, is seeking experienced engineers to enhance their platform. You will tackle significant problems while building impactful cloud applications using technologies like Rust, Go, and Kubernetes. The ideal candidate has over 5 years...Flexible hours$135k - $200k
Dormont Manufacturing Co is looking for a passionate Software Engineer to develop and maintain enterprise-level software applications. This hybrid role involves creating secure and scalable back-end systems using technologies like Python and Go, and contributing to front...- A prominent technology venture in San Francisco is seeking a Python, Backend Engineer to join their team on a hybrid basis. This role requires building out data infrastructure and developing backend solutions while collaborating closely with engineering teams. The ideal...Full time
$60k - $180k
Join to apply for the Founding Backend Software Engineer role at Rebolt (YC W25) Rebolt is building the next‑... ...developing, testing, and scaling RESTful APIs. Self‑motivated, low ego, and eager... ...‑solid RESTful APIs, evolution‑ready data models, and deployment/debug tools...Internship- OpenFunnel (YC F24) in San Francisco is looking for an exceptional engineer to build large-scale data systems and AI architecture. The role focuses on processing and enriching vast amounts of data, integrating with clients' sales tools, and pushing the boundaries of AI...
- Stealth AI is an early-stage startup in San Francisco seeking an AI-native Backend Engineer to build core data infrastructure. The role focuses on developing and operating data pipelines, ensuring reliability and quality for numerous clients daily. The ideal candidate will...
$224k - $284k
ATOMS Careers page is seeking a Backend Engineer to join their San Francisco team. You will design and scale the cloud systems that power real-world operations. Ideal candidates have 8+ years in backend systems, experience in Java or Go, and a strong knowledge of cloud...$215k - $290k
...startups at About the Role As a Founding Senior Backend Engineer, you’ll shape the core... ...teams to create intuitive APIs and interfaces for quick customer... ...bonus points for cloud infra/DevOps knowledge. Job Type... ...on CoderPad, focusing on data structures and algorithms....Full timeInternshipWork at officeWork from homeVisa sponsorshipFlexible hours$170k - $240k
Sigma Computing Inc. in San Francisco is seeking engineers to build a high-performance platform for data exploration. You will solve complex problems and deliver impactful capabilities in a collaborative environment. Ideal candidates have 5+ years of software development...- A leading CRM technology company in San Francisco is seeking experienced Backend Software Engineers to develop impactful applications for various cloud services. The role requires a related technical degree and over three years of backend software development experience...
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