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
- ...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$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$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$250k
...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- ...As a Senior Backend Software Engineer on our Diagnostics team, you'll build the part of Regard that reads a patient's medical chart — labs, medications, vitals, procedures, prior notes, history — and determines which conditions are present, along with the evidence supporting...SeniorFull timeWork at officeLocal areaHome officeVisa sponsorshipRelocation package2 days per week
$250k
...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$250k
...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 build and scale the payments infrastructure that powers deposits, withdrawals, and money movement across the platform....Senior$250k
...core of what Polymarket does. Every trade, every order, every market resolution runs through the systems this team owns. As a Senior Backend Engineer on the Services team, you'll be working directly on that infrastructure, building and scaling the backend that processes...Senior$250k
...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- ...rePurpose Global is hiring a backend-focused engineer to design and maintain scalable server-side services and APIs. You will own our AWS-based infrastructure, drive modern DevOps practices, and contribute across the full development lifecycle. You should be proficient...SeniorRemote work
- ...OuterSignal, a startup building the customer intelligence layer for commerce, is seeking a senior backend engineer to own core systems and data pipelines. You’ll design scalable infra to process millions of orders, implement vector DB/RAG workflows, and ship end-to-end...Senior
$165k - $225k
...Salary range: $165k – $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$250k
...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- ...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
- ...Senior Backend EngineerAs a Senior Backend Engineer, you will design, build, and deploy the backend services that power our creative brainstorming and creation products. You will work with web and video standards to power our suite of web-based image and video creation...SeniorFull timeWork at office
- ...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
$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- ...Senior Backend EngineerWe're seeking a Senior Backend Engineer with a passion for systems architecture, data modeling, and large-scale workflow orchestration. In this role, you'll architect and implement features end-to-end across our backend services and infrastructure...SeniorWork at office
- ...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
- ...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
- ...Experienced Back End Software EngineerWe are looking for an experienced back end software engineer to join our team. As an experienced team member, you will have a broad ownership and impact on the technology, product, and our culture. You will work alongside a first-...SeniorWork from home
$180k - $226k
...Senior Backend EngineerUniswap Labs is a core contributor to the Uniswap Protocol, the world's largest DEX, with over $4 trillion in volume... ...looking for an enthusiastic, self-motivated Senior Backend Engineer to help us build the next generation of financial products.ResponsibilitiesWrite...SeniorFull timeRemote workHome office- ...Combined, these products have facilitated over $285B in trading volume across Solana markets. Ellipsis Labs is seeking a Senior Backend Engineer to join our team. As an early-stage startup, we appreciate bright generalists who can iterate and ship quickly. In this...Senior
$180k - $270k
...Senior Backend Engineer We are building the AI agent platform that automates financial analysis, reporting, and data workflows for corporate finance teams. As Senior Backend Engineer you will own the systems that turn unstructured financial data into reliable, real...SeniorWork at officeImmediate start- ...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
- ...Giga Backend Engineer OpportunityGiga has recently raised a $61M Series A and is working with Fortune 500 customers to deploy the next generation... ...to our browser use agent in lieu of formal customer APIsAs a senior engineer, you'll be expected to make sound technical...Senior
- ...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
- ...Senior Backend Software EngineerDuration: one yearC2c Rate: $70 - 80/hrHybrid: Location: 2, Broadway, NY, NYPosition OverviewThe Senior Backend Software Engineer / Consultant is a hands-on engineer responsible for developing, integrating, testing, deploying, and supporting...SeniorAfternoon shift
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