Senior Backend Engineer
$160k - $180kNextDeavor
Senior Backend EngineerFull-time New York, NY, US Exclusive confidential search — details shared with qualified applicants.You will help build the enforcement infrastructure that ensures AI-driven communication is safe and compliant, delivering low-latency, reliable systems used across the organization. You will work as an individual contributor with significant architectural ownership, collaborating closely with engineering peers and product stakeholders. Hybrid (3 days onsite) in the New York City area.Here's how you'll make an impact on the team:Build the layer that connects AI agents and developer frameworks: proxies, SDKs, and agent toolingOwn the policy backend, including connectors, ingest of rule sources and restricted lists, and the engine that tracks rule changesBuild controls that determine what each agent is allowed to doDesign and operate systems to meet low latency and high reliability under enterprise loadMaintain a high bar for security and data protection when handling sensitive contentHere's what you'll need to be successful in this role:5+ years building and running production backends at scaleStrong experience in a modern backend language (Go, Python, Java, or Node)Solid knowledge of APIs, distributed systems, databases, queues, and cachingExperience with cloud environments, containers, and CI/CDFocus on latency, reliability, and writing clean codeHere's what else might help you out:Experience with low-latency or real-time systemsExperience building SDKs, proxies, or developer-facing infrastructureExperience working with sensitive or regulated dataPay range: $160,000 - $180,000/yearReady to make your mark?This role may fill quickly. Submit your resume to be considered.Apply with Pioneers here
- ...media, powered by fast, reliable, and deeply technical market infrastructure.About the rolePolymarket is looking for a senior/staff backend engineer to own the systems that connect our exchange to the outside world — market data distribution, order routing, and the high...Senior
- ...If banks and payment products were reinvented today, they would look like Fin. About the role We are looking for a Senior Backend Engineer to own the core systems that make this work. You will design and build the services that move real money, integrate with payment...SeniorFull timeWorldwide
- ...days in-office culture. Both founders are technical. Every engineer on the team has experience at early-stage startups. Several... ...to customers, make technical decisions, and ship. Role: Senior Backend Software Engineer We're a tiny engineering team building something...SeniorFull timeWork at office
$165 per hour
...DescriptionIf you say you have an idea and can covert that into a something beautiful, then you are the one we are looking for.As our Sr. Backend Engineer, you will be:You will develop efficient web services and APIsYou will participate in daily code deploys while working on...Senior- ...and we need your help adding fuel to the fire.About the RolePolymarket is launching perpetual futures and we're looking for Senior Backend Engineers to own the core systems that make it run. This is backend exchange engineering in the truest sense: low-latency order...Senior
$150k - $300k
$150,000-$300,000 per annum New York, United States Permanent Senior Backend Engineer - New York My client is a well funded early stage startup building a high scale social platform from the ground up. They are focused on building persistent, high performance...SeniorPermanent employment- ...global media, powered by fast, reliable, and deeply technical market infrastructure.About the rolePolymarket is looking for a senior backend engineer to build and scale the payments infrastructure that powers deposits, withdrawals, and money movement across the platform....Senior
$182.75k - $278.5k
...help change mental healthcare for the better. The Work Backend at Headway involves high-stakes logic. You’re building a reliable... ...that give providers their time back. The Insurance Billing Engine: We apply AI pragmatically ( blog ) to reduce administrative...SeniorFull timeFlexible hoursShift work- ...market infrastructure.About The RolePolymarket is looking for a backend engineer to build the systems that power how markets are created,... ...time.You’ll be a core individual contributor working with other senior engineers to design, implement, and operate the systems that...Senior
- ...global media, powered by fast, reliable, and deeply technical market infrastructure.About the rolePolymarket is looking for a backend/product engineer to own the core domain APIs and data models that power our consumer-facing product.You’ll work at the intersection of...Senior
- ...Join SignalFire’s Talent Network for Founding Back-end Software Engineer Roles at VC-Backed Startups This is not an application for a... ...enterprise SaaS. We’re looking to connect with exceptional Founding Backend Engineers who are excited about building scalable, high-...SeniorFull time
- ...ubiquitous beacon of truth in global media and we need your help adding fuel to the fire.About the RolePolymarket is looking for a Senior Backend Engineer to join our DeFi Trading team and own core improvements to our exchange systems. You'll work across low-latency APIs, high-...SeniorImmediate start
$185k - $225k
...role:Salary range: $185k - $225k USD*We are looking for smart engineers who love to code, seek challenging problems, and appreciate recognition... ...full-stack, data, ML, and DevOps engineers to build scalable backend solutions as we continue to grow. We're a small team where...SeniorWork at officeRemote work- ...global media, powered by fast, reliable, and deeply technical market infrastructure.About the rolePolymarket is looking for a backend engineer to build the detection, monitoring, and case-management systems that keep our platform compliant and safe at scale.This role partners...Senior
- ...Senior Backend EngineerOur client is building AI technology to make healthcare accessible and free for everyone. They are seeking backend engineers to develop scalable infrastructure that supports billions of AI driven consultations while ensuring medical safety and HIPAA...Senior
- ...Chairs and Ophelia) and an ex-Amazon Alexa engineer who led AI/ML teams at Salesforce. We've... ...and the opportunity to own foundational backend systems at a critical inflection point.Mission... ...and architecture with the CTO and a senior engineer.Onsite Team Day (Half Day, NYC):...Senior
- ...Senior Backend EngineerEllipsis Labs is a profitable, venture-backed New York-based startup building sustainable and efficient DeFi protocols... ...Solana markets.Ellipsis Labs is seeking a Senior Backend Engineer to join our team. As an early-stage startup, we appreciate bright...Senior
- ...Senior Backend Engineer Bevel is an AI Health Companion that helps people make smarter decisions about their health every day. Our app brings together data across sleep, recovery, activity, nutrition, and more, and turns it into real-time, personalized guidance. Whether...SeniorWork at office
- ...code quality improvement Use test driven development (TDD) and maintain test coverage Introduce engineering process improvements and tools (depending on seniority level) Mentoring/pair programming/leadership (depending on seniority level) Required ~6...Senior
$40 per hour
...Senior Backend EngineerDoctronic | New York City ONSITE (Hybrid) | Reports to CEOThe MissionLet's make healthcare free and accessible to... ...programs at top universitiesPreference for founders, founding engineers, or extensive startup experienceIndependent problem solver who...Senior- ...Backend EngineerFull-time | NYC / Remote | BenefitsDaze is a social calendar with powerful creative tools for scheduling your future... ...What We're Looking ForWe are looking for an experienced backend engineer to help design and maintain a secure and scalable service infrastructure...SeniorRemote work
- ...Overview: Senior Backend Engineer Location: On-site in New York City, New York (relocation required if not local) Work Setup: Office-first environment - in-person most days during the week Visa Sponsorship: Not available Role Summary We are hiring...SeniorTemporary workWork at officeLocal areaRelocation
- ...expanding fast into new verticals including investment banking, hedge funds, and research firms. Role Description As a Backend Engineer, you'll help build and scale the systems that power our AI-driven research platform. This is a systems-level role - ideal for...SeniorSummer workWork at office10 hours per week
- ...Senior Backend EngineerAstra is a high-impact engineering team building mission-critical financial infrastructure. Our fintech platform powers payment processing, fraud detection, and financial compliance for businesses handling 100M+ in weekly transaction volume. We maintain...SeniorRemote workFlexible hours
- ...with a customer to post-release monitoringSet technical direction across projects, mentor engineers, and raise the bar on how the team buildWhat You'll Bring5+ years of backend engineering experienceA strong eye for performance, reliability, and robust systems designYou...SeniorContract workFlexible hours3 days per week
$150k - $250k
...enterprise agents learn by doing. Instead of relying on brittle prompt engineering or static tests, we expose models to realistic user flows,... ...small engineering team by building the simulation engine, app backend, and frontend that power Veris AI. You will ship features used...Senior$262k - $369k
...Tapestry brings together experts in energy, AI, software, engineering, and product to build tools that help the electricity ecosystem... ...team and our mission here . About the role As a senior staff backend software engineer building Tapestry’s Agentic Data Platform...SeniorFull timeFlexible hours- ...identity with a team that holds a high bar for itself - keep reading. Socure is seeking a highly skilled and experienced Senior Software Engineer to join our dynamic engineering team within the Technology Center of Excellence. In this critical role, you will be a...Senior
$160k - $200k
...exciting opportunity to be part of a dynamic team creating the future of collecting. Role Summary We are hiring a Senior Backend Engineer to lead the evolution of the Live and Collect platforms to support international expansion and acquisition integration....SeniorTemporary work- ...market infrastructure.About the rolePolymarket is looking for a backend engineer to help build and scale the core exchange infrastructure that... ....You’ll be a core individual contributor working with other senior engineers to design, implement, and optimize the systems that...Senior
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