Senior Back End Engineer
$155k - $208kHorizon3.ai
Senior Backend Engineer
Horizon3.ai is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find, fix and verify exploitable attack vectors before criminals exploit them. Our flagship product, the NodeZeroTM platform, delivers production-safe autonomous pentests and other key assessment operations that scale across the largest internal, external, cloud, and hybrid cloud environments. NodeZero has been adopted by organizations of all sizes, from small educational institutions to government agencies and Global 100 enterprises. It is used by IT Ops/SecOps teams, consulting pentesters, and MSSPs and MSPs.
We are a fusion of former U.S. Special Operations cyber operators, startup engineers & operators, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools and false positives, resulting in alert fatigue, blind spots, "checkbox" security culture, cybersecurity skills shortage, and the long lead time and expense of hiring outside consultants. Collectively, we are a team of learn-it-alls, committed to a culture of respect, collaboration, ownership, and results.
As a remote first company, we require minimum 25Mbps consumer grade broadband connection.
The Senior Backend Engineer will be joining one of our world-class software engineering teams, and will be a key contributor to both user-facing product launches as well as platform enhancements and stability. This job description covers roles available across multiple teams. During the interview process, we'll work with you to determine the best team fit based on your experience, interests, and career goals.
Responsibilities:
- Develop core product features in ETL (Extract, Transform, Load) and GraphQL to support data processing and retrieval.
- Design and implement backend APIs in GraphQL to facilitate data interactions between different components of the product.
- Build and maintain ETL pipelines for efficient data processing and analytics.
- Collaborate with frontend team members to present data in a clear and user-friendly format, enhancing the product's user experience.
What You'll Bring:
- Ability to own and manage concurrent initiatives, demonstrating effective judgment in prioritization and time management.
- Driven, self-managed, capable of conceiving and implementing solutions on your own and with a team
- A strong desire to continuously improve and learn new technologies in a fast-paced Agile development environment
- Excellent analytical and problem-solving skills, effective communication, attention to detail and high-quality work
- Strong technical documentation ability to support the development process.
- Effective communication and collaboration with designers, developers, and product managers.
- Ability and interest in mentoring junior and mid-level engineers to foster their growth and development.
Required Education / Experience:
- Bachelor's Degree in Computer Science, Computer Engineering or related field.
- 7+ yrs professional software engineering experience using modern object-oriented or functional languages (Python, Java, Go, Scala, C++, TypeScript, etc).
- Experience building applications on cloud computing platforms such as AWS, Azure, GCP, using container technologies such as Docker and Kubernetes.
- Expert proficiency in SQL.
Preferred Education/Experience:
- Experience with various database architectures including relational (PostgreSQL) and graph (Neo4j).
- Experience building GraphQL backends.
- Experience managing and maintaining production infrastructure.
- Experience building platform capabilities for internal teams.
Travel Required:
We are a fully remote company with a strong preference for candidates in the Bay Area. This job may require up to 5% of travel to be successful.
Compensation and Values:
At Horizon3, we believe that our people are our greatest asset, and our compensation philosophy reflects this core value. We are committed to fostering an environment where all employees feel valued, respected, and rewarded for their contributions. Our compensation structure is designed to be fair, competitive, and transparent, ensuring that every team member is recognized and compensated equitably across roles, levels, and locations.
In accordance with various State's transparency regulations, we provide the following salary range information for this position:
- Base salary range: $155,000 - $208,000 annually. The exact salary will be determined based on the selected candidate's location, qualifications, experience, and relevant skills.
- Additional compensation: All full-time roles are eligible for an equity package in the form of stock options.
Perks of Horizon3.ai:
- Inclusive Team: We value diversity and promote an inclusive culture where everyone can thrive.
- Growth Opportunities: Be part of a dynamic and growing team with numerous career development opportunities.
- Innovative Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking.
- Remote Work: We are a 100% remote company. Enjoy the flexibility to work in the way that supports you and brings out your best.
- Competitive Compensation: We offer competitive salary, equity and benefits. Our benefits include health, vision & dental insurance for you and your family, a flexible vacation policy, and generous parental leave.
You Belong Here:
Horizon3 is not just an equal opportunity employer - we are a community that values diversity, equity, and inclusion as fundamental principles of our culture and success. We are dedicated to fostering a workplace where everyone feels welcome and respected, regardless of race, color, religion, sex, national origin, age, disability, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, hair length or any other legally protected status by law.
Our commitment to diversity and inclusion means we strive to attract, develop, and retain a workforce that reflects the varied communities we serve. We believe that diverse perspectives drive innovation and strengthen our ability to create cutting-edge cybersecurity solutions. At Horizon3, every team member is valued and supported in an environment that encourages personal and professional growth.
We welcome candidates from all backgrounds and experiences, and we encourage all qualified individuals to apply. Come be a part of Horizon3, where your unique contributions are recognized, and your potential is limitless.
Other Duties:
Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee. Duties, responsibilities, and activities may change at any time with or without notice.
Application Note:
In any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information.
- ...Senior Web3 Back End Engineer Our client is an US based company, operating within the crypto economy and is supported by top tier funds. The company is focussed to connect capital to the most attractive risk adjusted yield across chains. The company is growing its valued...SeniorContract workRemote workShift work
$113.4k - $252k
...the business Provide technical leadership and mentoring to other engineers on the team Contribute and drive frameworks that lead to... ...plus The posted pay range represents the anticipated low and high end of the compensation for this position and is subject to change based...Senior- ...To support the development of innovative AI-driven solutions, the full-time Senior Back-End Engineer will lead the design and deployment of scalable backend systems using Django and Python, while collaborating with cross-functional teams in a remote environment. Key responsibilities...SeniorFull timeRemote work
- ...Senior Backend Engineer We are looking for a Senior Backend Engineer to join the engineering teams behind the Xero Accounting App (XAA), our flagship mobile experience that helps small business owners stay on top of their finances wherever they are. You will contribute...SeniorShift work
- ...As a Senior Back End Engineer, you will play a pivotal role in building scalable, fast and highly available API alongside cloud infrastructure from the ground up. Reporting directly to the CTO, you are expected to take ownership of the key features from the Back End perspective...SeniorRemote work
- ...conversation our customers depend on. You'll join as the third engineer on a high-ownership team, taking full production responsibility... ...native engineering posture. What You'll Do Operate as a senior individual contributor on the backend services team, owning...SeniorLocal areaRemote workFlexible hoursShift work
- ...Senior Staff Back-End AppSec Engineer, responsible for leading customer engagements in application security, conducting code reviews, and mentoring engineers in a full-time salaried position. Key Responsibilities Lead customer engagements, scope work, and present technical...SeniorFull timeRemote work
- ...cryptocurrency trading platform. Currently, we are looking for a mid/senior backend developer to join our global team and build out the... ...a bonus. - Bachelor's degree in computer science, software engineering or related major. - Knowledge on cryptocurrency exchange and...SeniorWork experience placementRemote workFlexible hours
- ...Senior Back-End Engineer Location: Denver, CO or NYC (On-site) Workplace Type: On-site GC and USC Overview We're looking for a talented and dedicated Senior Back-End Developer focused on low-latency, real-time application development...SeniorWork experience placement
$150k - $270k
...you.com, we are on a mission to create the most helpful search engine in the world—one that prioritizes transparency, privacy, and user... ...and contributing to cutting-edge technology? We're looking for a Senior Backend Engineer to design and develop the foundational systems...SeniorFull timeImmediate startRemote workWork from homeFlexible hours- ...scalability, and performance Conduct code reviews and mentor junior engineers Debug complex issues across the stack Collaborate with... .... Team Up with Skilled Professionals: Join forces with senior talent. All of our team members are seasoned experts, ensuring...SeniorFor contractorsRemote work
$150k - $225k
...exciting time to join! Role Overview We're seeking a Senior Backend Engineer to join our Dynamic Copay team. You'll work on our Dynamic... ...Characteristics Self-directed and comfortable owning a domain end-to-end Mission-driven - motivated by making healthcare...SeniorLocal areaRemote workHome office- ...Senior Back-End Engineer - Work From Home This Senior Back-End Engineer position is a 100% Remote opportunity. Compensation includes salary plus equity and the company fully covers cost of medical, dental and vision insurance for employee, spouse and children!...SeniorRemote workWork from home
- ...Senior Back-End Engineer (6-Month Contract)Youtopia Marketplace — Remote (U.S.)*Must be able to work core hours of 9-3:30 Mountain Time ZoneAt Youtopia Marketplace, we're engineering the future of human health and longevity through Precision Nourishment Automation. Our...SeniorContract workRemote work
- ...Senior Back‑end Engineer We are looking for a Senior Back‑end Engineer to design and build scalable, secure, and high‑performance backend systems that power modern SaaS applications. In this role, you will lead the architecture and development of.NET‑based microservices...SeniorFor contractorsRemote workFlexible hours
- ...Senior Back-End Engineer At Finastra, we're a global leader in financial services software, dedicated to expanding access to financial services and shaping what's next for the industry. Our technology powers mission-critical solutions across Lending, Payments and Universal...SeniorImmediate startWorldwide
- ...Senior Back-End Engineer Engineering at Nabla is lean, fast-moving, and deeply technical. Our teams span machine learning, native desktop applications, and platform infrastructure to deliver AI into clinical settings reliably and at scale. At Nabla, product development...SeniorWork at officeRemote work2 days per week
$140k - $160k
...Senior Back-End Engineer, US Remote Build AI-driven tax solutions remotely in US as a Senior Back-End Engineer at TaxGPT. Work closely with our CEO and CTO to transform tax workflows for professionals and SMBs. Location: US Remote Experience: 7+ years Pay Range: $140k...SeniorImmediate startRemote work- ...skilled and knowledgeable individuals to join our team. Senior Backend Engineer Company Overview United Parks & Resorts Inc. (NYSE... ...Sitecore-based platform and supports key E-Commerce journeys end-to-end, with an emphasis on reliability, performance, and automated...SeniorRemote workFlexible hours
- ...Senior Vice President, Back-end Software Engineer At BNY, our culture allows us to run our company better and enables employees' growth and success. As a leading global financial services company at the heart of the global financial system, we influence nearly...SeniorWork experience placementWorldwideFlexible hours
$195k - $280k
...Senior Back End Engineer [Remote-US] To help keep everyone safe, we encourage all applicants to pay close attention to protect themselves during their job search. When applying for a position online you are at risk of being targeted by malicious actors looking for...SeniorExtra incomeLocal areaRemote workWork from homeHome officeFlexible hours$150k - $225k
...Senior Back-End Engineer II: Infrastructure Helm is a Series A start-up transforming health insurance with "Dynamic Copay" – a new insurance plan that lets members see simple, upfront prices for all medical care before making decisions. Our team is building the infrastructure...SeniorLocal areaRemote workHome office- ...Senior/Staff/Principal Back-End and Front-End Engineers - New York - On-Site - Opportunity to join one of the Fastest-Growing and Well-Known Fin-Tech Start-Ups in NYC This young and agile company, building a cutting-edge commerce network is currently seeking Back...Senior
- ...Senior Back End Engineer Tech Tammina LLC Job Description Required Skills: BS or MS in Computer Science, Mathematics, or equivalent field of study with at least 5 years experience Large scale distributed systems Must have knowledge with JAVA, Spring...Senior
- ...Backend Engineer Opportunity Arbor helps renters, homeowners, and small businesses pay less for electricity. Behind the scenes, Arbor is building an intelligent electricity marketplace to power an abundant electric future. As AI data centers drive a surge in electricity...SeniorRemote work
$155k - $208k
...SecOps teams, consulting pentesters, and MSSPs and MSPs. We are a fusion of former U.S. Special Operations cyber operators, startup engineers & operators, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems:...SeniorFull timeRemote workFlexible hours- ...Senior Backend Engineer We are seeking a Senior Backend Engineer with deep technical expertise in Rust and a strong working knowledge of Python to be the driving technical force behind a major language migration strategy. In this role, you will take full ownership of...SeniorRemote work
$150k - $250k
...Senior Back End Engineer - Blockchain (Remote) We are recognized as a world-leading Emerging Technology staffing and recruiting firm, with a strong specialization in Blockchain. We recruit CTOs, VPs, Senior Software Architects, Application Developers and Software Engineers...SeniorPermanent employmentFull timeWork at officeRemote workWork from home- ...Senior Back-End Software Engineer ScaleXP is a ground-breaking early stage startup, with the ambitious goal of helping business leaders across the globe harness the power of their own data to make the best decisions for their companies. We are building the world's leading...SeniorWork at officeRemote workRelocation
- A dynamic technology firm in Las Vegas is seeking an experienced Senior C++ Back-End or Full Stack Developer to join their team. This role requires expertise in C++ and strong database development skills, particularly in regulated industries such as gambling or payments...Senior
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Senior Back End Engineer. Be the first to apply!
- entry level back-end developer United States
- backend python developer United States
- c# backend developer United States
- junior backend developer United States
- remote back end developer United States
- java developer backend United States
- back-end developer United States
- senior backend developer United States
- backend software engineer United States
- lead backend developer United States

