Backend Engineer
ESR Healthcare
Backend EngineerJob Type: ContractLocation: RemoteAs an expert, you will be creating Reinforcement Learning Environments which test an AI model's ability to solve backend software problems related to fixing code, building APIs, and improving data handling and performance. You will be tasked with creating a reproducible environment and a golden reference solution for the problem.Scope of WorkContribute clear code samples, debugging approaches, and development insights in Python3, Java, Go, Rust, C++, or TypeScript.Identify, troubleshoot, and resolve backend bugs, data handling issues, and performance bottlenecks.Build small to medium features, including APIs and database logic, following good coding practices.Improve existing backend code and database queries for better clarity, efficiency, and reliability.Document your reasoning, approach, and code decisions to support AI training data quality.Review peer-contributed code and technical submissions for correctness and clarity.Preferred Qualifications1+ years of hands-on experience in at least one of the following: Python3, Java, Go, Rust, C++, or TypeScript.Solid understanding of API design, databases (SQL or NoSQL), and core data structures.Ability to debug backend issues, find root causes, and fix them cleanly.Comfortable working across different codebases and picking up unfamiliar systems.Good documentation and communication skills to explain your technical decisions clearly.Interest in or curiosity about AI and its technical challenges (previous AI experience not required).
$180k - $230k
...A start up is looking for a Backend Founding Engineer to join their team. Location: NYC; Must be able to work in NYC 4 days onsite per week Compensation: $180-230k + Equity Must have worked at early stage start-ups! US Citizens/GC Holders; no C2C/3rd parties...SuggestedFull time- ...Backend Engineer About Discernis Discernis builds AI driven document intelligence for high stakes legal work. Because our customers handle privileged and regulated matters that most cloud AI cannot touch, we run on premises and in customer controlled environments...SuggestedFull 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...Suggested$150k - $250k
...challenging problems and tackle food insecurity and waste with technology. We're looking for talented engineers in NYC to join our mission. About the Role As a Backend Engineer at Guac, you'll have real impact and ownership over technical decisions, strategy, and...SuggestedFull timeWork at office- ...robust asynchronous architecture , and CockroachDB as the primary database. We are looking for engineers who are eager to tackle challenges in fintech, build scalable backend services, and contribute to the next generation of banking infrastructure. This position...SuggestedFull timeWork at office3 days per week
- ...Backend EngineerWe are looking for a backend engineer who is a Go expert. Additional familiarity with the Kubernetes and Helm APIs is certainly preferred but not required.You will be expected to push critical code on a daily basis, help to architect our backend, and also...Immediate startRemote workMonday to FridayShift work
$180k - $250k
...partners, real revenue signals, and significant ownership upside. Engineers who enjoy solving money-movement problems at scale will thrive... ...right candidate.What You'll DoDesign, build, and operate core backend services for stablecoin infrastructure: mint/burn flows,...Immediate startRelocation package- ...yours too.Who We HireWe're looking for pragmatic, high-agency engineers who thrive in ambiguity and care as much about the system as the... ...you'll pick it up fast.You'll stand out if you:Have 3+ years of backend experience with exposure to platform or infrastructure work....
- ...New York City | In person | Full time TL;DR Deepline is hiring a Founding Backend Engineer to build the systems that make bespoke GTM software reliable in production. You will own the data, integrations, and execution infrastructure behind a product that lets people...Full time
- ...Software Engineer Opportunity At FrecWe created Frec to expand the possibilities for everyone and their money. We're a tight team of builders... ...team of experienced engineers across all areas related to the backend powering Frec. You will own large pieces of the infrastructure...Work at officeFlexible hours
- ...sources into a coherent, high-performance application layer.You should have:Strong Python Experience – Deep proficiency in Python for backend development, including experience with asynchronous programming and understanding of web framework internals.Expertise in Event-...
- ...Founding Backend EngineerLocation: New York City Work Style: In-office, 5 days per week Employment Type: Full-time Experience: 6–10 years Focus: Backend Engineering, Data Modeling, Knowledge Graphs, Agentic Workflows, Chemical ManufacturingAbout Our ClientOur client is...Full timeWork at office
- ...how insurance products are sold. Established in 2018, Portra is venture-backed and based in New York. We're looking for a Backend Engineer to join our team to design and build scalable systems and APIs. You'll work closely with cross-functional teams to develop...Local area
- ...impact the roadmap and vision of our company.What You'll DoBe a critical part of the technical and product roadmapContribute to our backend and integrate a variety of third-party servicesScale our infrastructure to millions of end users globallyRapidly ship new...Work at officeWork from homeWorldwideFlexible hours
- ...Backend EngineerCambio is a software platform for real estate decarbonization. We help commercial real estate owners bring their portfolios... ...startup in our category.The RoleWe're looking for a Backend Engineer to build, help teammates do their best work, and have fun doing...Work at office
$80 per hour
...both tech and advisory. You can learn more about us on our website. Role Details Role overview: We're looking for a backend engineer to help build and scale our integration infrastructure. You'll work closely with our staff backend engineer to tackle complex...Work at officeLocal area- ...Agentic AI Procurement Suite that powers the procurement of tomorrow, digital, transparent, and intelligent. We are looking for a Backend Engineer who is excited to build modern, reliable backend services and grow their technical expertise over time. You will work closely...Work at officeRemote workFlexible hours
$180k - $250k
...Backend EngineerLondon, England, United Kingdom; New York, New York, United States; San Francisco, California, United States; Seattle... ...amplify our impact.What We're Looking ForWe're looking for a Backend Engineer to help develop and scale the Lightning AI platform, spanning...Work at officeWork from homeFlexible hours2 days per week$110k - $150k
...team members working from the office four days per week and Wednesdays designated as a work-from-home day.We're Looking ForA Backend Engineer with experience in Fintech or marketplaces who will be at the forefront of our mission to bring better finance solutions to millions...Full timeWork at officeWork from home$140k - $210k
...About the Project & Team: At the SDF, a small team of roughly 8 engineers is incubating a novel distributed systems prototype. Not a... ...SDF, this is the place to be. About the Role: We need a Backend/Systems Engineer who owns the critical layer between our core infrastructure...Temporary workWork at officeLocal areaWorldwideFlexible hours$110k - $270k
...Job Description Job Description Maxana is seeking an experienced Backend Engineer for a confidential client — a well-funded AI platform company used by ML teams globally. In this role you will own features end to end across APIs, CLI tooling, billing systems, and...Full timeFlexible hours2 days per week- ...and Green Card only What you’ll do Build highly scalable backend systems that allows for Atom to scale as our user base grows.... ...practices. Required skills ~2+ years experience as a backend engineer. ~ Bachelors or equivalent in computer science. ~ Highly...Full time
- ...Job Description Job Description Founding Senior Backend Engineer (Data Platform / Integrations) Location: New York City — In-Person The Opportunity Our client is hiring a Founding Senior Backend Engineer to own the data platform end-to-end and build the...
- ...Job Description Job Description JOB DESCRIPTION As our first backend engineer, you'll take the lead in implementing Echofi's core infrastructure. You will be responsible for designing, testing, and deploying the backend services that make our platform run smoothly...Work at office
- ...position that is critical to the continued development and scale of its core payments platform. They are looking for a Backend Software Engineer who will design, build, and own highly reliable backend services, APIs, integrations, and infrastructure supporting...Full time
- ...reliability — and grow the team that runs it. This is a high-impact engineering role with meaningful equity, real ownership, and direct... ...scales. What you'll do Set the architecture. Own how our backend fleet and data pipeline fit together, and where they go next....Full time
- ...opportunity to help build core infrastructure for the next generation of financial markets. About the Role As a Senior Rust Backend Engineer, you will work across the platform with a high-performing engineering team. You’ll design, architect, and build core and edge...Full time
$160k - $240k
...leading investors, the company is expanding rapidly and looking for engineers who thrive in a fast-paced, high-ownership environment where... ...product and business. About the Role Design and build backend services powering fintech and SaaS products for healthcare customers...Full timeWork at officeRemote work$250k
...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 matching...$155k - $300k
...unlocks user growth. We operate at the intersection of financial infrastructure, complex engineering, and product experience. About the Role We’re looking for a BackEnd Engineer to join our growing team at Fun and help architect the backend services that power...Live inWork at officeRemote workWork from homeMonday to ThursdayShift work
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