Senior Backend Engineer
Medal
The RoleMedal's backend powers everything from real-time in-app communications and storage of billions of user-generated clips to our ML-based feed and social features. You'll work closely with product, infra, and data teams to architect and build highly scalable, low-latency systems, helping design critical APIs, evolving our backend infrastructure, mentoring other engineers, and driving technical decisions that impact millions of users.What We're Looking For5+ years of backend engineering experience, with significant time in production environmentsStrong proficiency in Java and hands-on experience building scalable microservicesDeep understanding of RESTful API design and distributed systemsRelational databases: Experience with MySQL or PostgreSQL, including performance tuning and schema designExperience building systems that handle thousands of requests per secondComfort with cloud infrastructure (GCP or AWS preferred), CI/CD, and infrastructure as codeStrong grasp of system design, architectural patterns, and security best practicesStrong communication and leadership skills, with the ability to drive cross-team projectsBonus: Redis, RabbitMQ, or other message brokers and caching systems; SRE/DevOps or DevSecOps experienceOur StackElectron, React, Redux, Styled Components & other modern web-based technologies C# and C++ for native Windows recording & more Swift for iOS, Kotlin for Android Java, Redis, RabbitMQ, Kubernetes for backend Terraform, Salt, GitHub Actions, CircleCI for IaC and CI/CD
- ...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
$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
- ...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
- ...Lightning AI is seeking a Senior Software Engineer to design and build the backend systems powering AI agent orchestration and execution. You’ll create scalable APIs and platform capabilities for tool use, workflow orchestration, memory, and state management. You’ll partner...Senior
- ...MongoDB's Atlas team is a diverse group of engineers building and operating MongoDB Atlas, our database-as-a-service, which enables... ...to balance collaboration with focused work. We are seeking a senior backend engineer focused on identity and access management who can design...Senior
- ...Kinvr is seeking a Senior/Staff Backend Engineer in New York City. Join a fast-growing travel tech company and contribute to complex booking systems, content and supplier integrations, and internal infrastructure. You will own epics end to end, collaborate with product...Senior
$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- ...A fintech startup in New York is seeking an experienced backend engineer to scale their systems supporting financial document automation. The role entails assessment of current architecture and designing scalable solutions to handle increasing data volume and sensitivity...Senior
- ...davidjoseph-co is seeking a Senior Backend Engineer in New York, NY to join as an IC in an early-stage, AI-native B2B SaaS startup. You will design, build, and operate production-grade backend services on a Python + AWS serverless stack, owning features end-to-end while...Senior
- ...Maximor AI in New York is seeking a Senior Software Engineer to contribute significantly to the future of the finance stack. The role emphasizes... ..., preferably aligned with fintech, and is skilled in backend development using modern programming languages. This position...Senior
- ...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
- ...United States Digital Space LLC is seeking a Senior Software Engineer with strong Go and React skills to join a fast-growing team in the United States. The role focuses on backend development within a distributed architecture, mentoring peers, and delivering scalable,...Senior
$175k - $195k
...A leading fintech startup in New York seeks a software engineer to build scalable systems to power B2B billing. You'll own critical infrastructures... ...candidates have experience in event-driven systems, strong backend language skills, and a passion for customer-focused solutions....SeniorRemote work- ...Wealth.com is looking for a Software Engineer to design, build, and scale backend systems for estate planning and AI-driven products. The ideal candidate should have 3+ years of backend engineering experience, especially with TypeScript or other typed languages. Responsibilities...Senior
- ...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
- ...Axon is seeking a backend-focused software engineer to join the Prepared team in New York City. This hybrid position involves tackling challenges in audio/video processing and AI, ensuring the stability and speed of mission-critical systems. Applicants should have at least...SeniorFlexible hours
- ...DEPT is hiring a Senior Engineer to own backend services and APIs for global brands, with occasional frontend work. You will design, implement, and ship features, resolve ambiguous specs, and collaborate with product, design, and marketing teams. We value code quality...SeniorCasual work
- ...A leading financial technology company is looking for senior software engineers focusing on backend development. This role involves taking ownership of services, building APIs, and leading projects. The ideal candidates will be proficient in Go and TypeScript/Node.js,...SeniorRemote work
$195.5k - $264.5k
...Pave is looking for an experienced backend engineer to lead critical services on their compensation intelligence platform. The ideal candidate will have at least 5 years of experience in backend engineering, with a strong grasp of data-heavy applications using TypeScript...Senior- ...present. Today, that time is lost to admin work that pulls nurses away from what matters most: people.Your MissionAs a Freelance Senior Backend Engineer for our German Market squad, you'll ensure that data flows smoothly between our products and our partners' software...SeniorFreelanceRemote work
- ...Senior Backend EngineerBevel is an AI Health Companion that helps people make smarter decisions about their health every day. Our app brings... ...from our users. We're looking for incredible Senior Backend Engineers to help us build an ambitious roadmap. You'll get an...SeniorWork at office
- ...continuous code quality improvementUse test driven development (TDD) and maintain test coverageIntroduce engineering process improvements and tools (depending on seniority level)Mentoring/pair programming/leadership (depending on seniority level)Required6 years MIN...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
- ...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
- ...and we're expanding fast into new verticals including investment banking, hedge funds, and research firms.Role DescriptionAs 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...SeniorWork at office10 hours per week
$200k - $275k
...Senior Backend EngineerTitle of Role: Senior Backend EngineerLocation: New York, onsiteCompany Stage of Funding: Venture-Backed — ConsumerOffice... ...Ideal Candidate Background6+ years of experience in backend engineering, with a strong focus on Python and FastAPI.Proficient in...Senior
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