SENIOR BACKEND ENGINEER
$70 - $75 per hourWideNet Consulting
Job Description/Skills: Location: This position is remote in the US (cannot work outside of the US). What You’ll Do Champion the design, development, and delivery of cloud-native orchestration services supporting internal systems and vendor platforms Define and evolve API contracts (REST, GraphQL), JSON schemas, event contracts and canonical structures, with an emphasis on scalability, performance, and observability Contribute to architectural decisions, particularly around microservices, API-to-API, events, webservices/webhooks, in a real-world production context Develop a strong understanding of the business processes and logic the orchestration layer supports Design and implement data publishing workflows to support operational and analytical data needs, evolving as necessary Collaborate closely with engineers, product owners, architects, analysts to translate business needs into working software Contribute to the full service lifecycle—from development and CI/CD to infrastructure and deployment Champion observability practices including structured logging, monitoring, and instrumentation (Datadog or AWS Cloudwatch experience preferred) Drive engineering excellence by leading design reviews, contributing to post-mortems, and documenting key decisions and patterns Proactively manage technical debt and enable platform scalability through thoughtful system design and domain ownership Who You Are 5+ years of backend engineering experience, including leadership of complex projects or services, 3+ years working with cloud serverless and orchestration services (AWS preferred – Lambda, Step Functions, API Gateway, EventBridge, etc; similar experience in GCP or Azure will be considered) Bachelor’s or master’s degree in computer science or related field? Strong proficiency in modern backend languages/frameworks with cloud SDK support (Node/Typescript, NestJS, Python), experience writing helper functions/data transformations python or similar Experience building, integrating with ETL pipelines Solid grasp of event-driven architectures, patterns, enrichment, and production-ready design considerations Familiarity with Infrastructure as Code (CDK, CloudFormation, YAML) Experienced in Agile, flexible working culture, delivering solutions in both a ‘0 to 1’ manner, and in small iterations Ability to independently set up services, including CI/CD pipelines and infrastructure with secure authentication Experience designing systems that publish to an ODS or similar analytical data store, with attention to event durability, schema evolution, and downstream data consumer needs Self-directed and adaptable—able to work effectively in greenfield environments, understand how to take a prototyped system or feature to production Passionate about mentoring, documenting, and fostering a culture of ownership and excellence Experience in insurance or financial technology services is a plus Some familiarity with Salesforce development is a plus Our Client’s Environment Lean, fully remote team with members across U.S. time zones Greenfield development on AWS in the Group Insurance Claims space – you won’t be retrofitting legacy systems or inheriting old codebases The company uses JS, Java, C#, Typescript, Python services deployed onto AWS infrastructure widely CI/CD powered by Azure DevOps Pipelines; infrastructure managed through AWS CDK and declarative templates They value curiosity, collaboration, and creativity—engineers here level up the team, not just the tech Pay Range:$70.00 – $75.00 per hour, depending upon experience. Health & Medical Benefits, 401K, Employee Assistance Program, and Sick Time applicable by state.
- ...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
- ...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
- ...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
- ...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
$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- ...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
- ...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
- ...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
- ...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
- ...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
- ...Tecla is seeking a Senior Backend Engineer to design, build, and maintain scalable backend services using NestJS and Node.js. You will model data across MongoDB and PostgreSQL and apply domain-driven design to create robust architectures. A key focus is designing, building...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
$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- A leading global creator ecosystem is seeking a Senior / Staff Backend Engineer to architect and evolve the systems that power creator monetization and platform transactions. This remote role demands expertise in Node.js and TypeScript, focusing on building reliable backend...SeniorRemote work
- ...Stripe, etc. is highly desirable, but not required. Deep payments experience is mandatory. About the Role We are seeking a senior backend engineer to support a payment modernization initiative. You will work directly under the CTO to build and integrate payment orchestration...SeniorFull timeContract workRemote workFlexible hours
- ...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
- ...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
$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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