Mercor logo
Mercor

Cincinnatus is an enterprise staffing company that partners with leading technology companies to source and employ highly skilled professionals for full-time and long-term contingent roles. Cincinnatus serves as the employer of record for these engagements, providing W-2 employment, payroll, benefits, and compliance, while placing employees directly within client teams to work on high-impact initiatives. Roles hired through Cincinnatus are not project-based or freelance engagements. They are structured, role-based positions that typically involve full-time or fixed-term commitments, close collaboration with a client's internal teams, and integration into standard enterprise workflows. Cincinnatus is a legal entity separate from Mercor. While opportunities may be discovered through Mercor's platform, employment, onboarding, payroll, and benefits for these roles are administered by Cincinnatus. Equal Employment Opportunity Cincinnatus is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, reproductive health decisions, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, political views or activity, or any other legally protected characteristic. Cincinnatus is committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans throughout the job application process.

Full-Stack Engineer - SaaS Expert

Full-stack EngineerSoftware EngineerFull TimeRemoteMid LevelH1B No Sponsor

Location

United States

Posted

20 days ago

Salary

$75 - $95 / hour

Seniority

Mid Level

Job Description

Full-Stack Engineer - SaaS Expert

Mercor

Role Description Lead architecture decisions across frontend, backend, data, and infrastructure for a multi-tenant SaaS product. Balance configurability with maintainability. - Build admin-managed configuration for fee models, reporting periods, escalation rules, and integrations. Ensure no code changes are required per tenant. - Design and maintain RBAC across distinct user populations with separate permission matrices per portal. - Develop fee calculation engines supporting percentage, flat, capped, and tiered models. Deliver audit-ready exports at penny-level precision. - Implement payment lifecycle tracking, cash reconciliation, and exception handling against external payment systems. - Integrate payment processors, procurement ERPs, CRM systems, and notification services into a cohesive platform. Qualifications - Must-Have: - 5+ years of professional full-stack engineering experience. - 2+ years as a lead or sole developer on a production SaaS product. - Experience building multi-tenant SaaS with tenant-level configurability. - Developed role-based access control spanning internal operators, vendors, and customers. - Built fee calculation engines and payment lifecycle tracking. - Integrated payment processors, procurement ERPs, and CRM systems. - Strong written and verbal communication skills. - Preferred: - Experience with government procurement or regulated financial compliance. - Familiarity with government payment gateways. - BI embedding experience with row-level data isolation across tenants. - Experience exposing platform functionality through a typed SDK or API. Application Process - Upload resume - AI interview based on your resume - Submit form Resources & Support - For details about the interview process and platform information, please check: https://talent.docs.mercor.com/welcome - For any help or support, reach out to: support@mercor.com - PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.

Related Job Pages

More Full-stack Engineer Jobs

Spektrum Group logo

Software Developer

Spektrum Group

We don’t just say we’re different, WE ARE DIFFERENT.

ContractRemoteTeam 1-10H1B No Sponsor

• Design, develop, and deliver high-quality code implementing new features/user stories • Improving existing functionality (refactoring, optimizations) • Use version control (Git) properly and apply branching strategies in use • Writing automated unit/integration tests • Following coding standards and architectural patterns and ensure code meets quality gates (linting, tests, coverage thresholds) • Participate in code reviews • Assist QA when needed • Prepare and support test events with users and stakeholders • Develop, and deliver high-quality code fixing software bugs and performance issues • Develop and maintain documentation needed for team usage • API/interface definitions • README / usage instructions • Architecture notes for complex changes • How-to and wiki documents for new technical changes, tools or packages introduced • Participate in planning meetings, daily status update meetings, and other meetings, via electronic means using conference call capabilities, according to NCIA instructions. • Participate in workshops, events and conferences related to the supported services, as requested by the NCIA project team. • Provide a consolidated monthly report in the form of a completed Delivery Acceptance Sheet (DAS) (Annex B), with traceability to planned scope and annotating the deliverables produced for the projects and activities supported, signed by the individual contractor personnel.

Belgium
€13.5K - €27.0K / month
Job Closed
RxVantage logo

Senior Full Stack Engineer - Team Lead

RxVantage

The modern way physicians and life science companies connect.

Full TimeRemoteTeam 51-200H1B No Sponsor

Role Description We’re looking for a seasoned Senior Full Stack Engineer - Team Lead to join our high-performing, fully remote engineering team. In this role, you’ll lead a small team of engineers while remaining deeply hands-on in building and evolving our user-facing applications, strengthening core platform capabilities, and delivering high-quality features across both the frontend and backend. You’ll be expected to operate with a high degree of autonomy—consistently delivering high-impact features, shaping implementation patterns, and elevating the technical quality of the systems you work on. This role blends technical leadership and direct people management: - Lead a small team across multiple domains including API development, CRM systems, core application features, and data ingestion workflows. - Remain actively hands-on in code development. The ideal candidate is an experienced engineering leader who can navigate complex systems, make sound architectural decisions, and bring structure and accountability to multi-project delivery. We’re looking for someone who not only writes excellent code but also raises the technical bar for the team through strong judgment, proactive problem-solving, thoughtful engineering practices, and effective team leadership. You’ll be responsible for: - Leading a small team of engineers across multiple concurrent initiatives, ensuring clear scoping, execution discipline, and delivery accountability. - Driving team execution rituals (sprint planning, backlog refinement, retrospectives) and ensuring work is well-scoped with clear acceptance criteria and measurable outcomes. - Owning delivery tracking and transparency using Jira and documentation via Confluence, keeping stakeholders aligned on status, risks, tradeoffs, and priorities. - Designing and building robust GraphQL and REST APIs and scalable backend services that are both internal and external facing. - Taking end-to-end technical ownership of features across both product and data domains. - Contributing hands-on production-level code across frontend (React, TypeScript) and backend (Node.js, SQL, GraphQL, REST) systems. - Developing and supporting data ingestion workflows and integration logic, including ETL-style processing and downstream system integrations. - Designing technical solutions that support application growth, reliability, performance, and maintainability. - Owning complex cross-domain engineering initiatives spanning application features, API systems, CRM functionality, and data workflows. - Promoting engineering excellence through code quality, performance optimization, testing best practices, and architecture documentation. - Partnering closely with Product and cross-functional stakeholders to translate business requirements into scalable engineering solutions. - Leveraging AI-assisted development tools (e.g., Claude Code) to improve engineering velocity, code quality, and delivery efficiency, while tracking measurable impact through KPIs such as cycle time, defect rates, and throughput. - Mentoring engineers through code reviews, design discussions, career development conversations, and structured feedback. Qualifications - 8+ years of experience as a software engineer building production-grade applications. - Strong expertise in React, TypeScript, and modern front-end development practices. - Proven experience designing, building, and scaling APIs (GraphQL and REST) in production environments. - Strong backend development experience using Node.js, TypeScript, and SQL (PostgreSQL preferred). - Experience working within modern monorepo setups (Nx, Turborepo, Yarn Workspaces, etc.). - Strong data modeling and database design experience, ideally with PostgreSQL. - Experience building, integrating, and supporting data ingestion pipelines and application-level data processing logic (Node.js, Python, or SQL), with attention to performance, scalability, and maintainability. - Comfortable building, supporting, and integrating with production-grade ETL/data pipelines. - Strong understanding of automated testing practices and CI/CD workflows. - Familiarity with cloud infrastructure (AWS preferred) and containerization. - Comfortable working across both greenfield and legacy systems. Requirements - Technically versatile and capable of leading projects across both application and data-focused initiatives. - Confident in navigating ambiguity and owning delivery from problem framing through execution. - Strong communication skills with an ability to bridge technical and non-technical stakeholders. - Demonstrated experience mentoring engineers, developing talent, and contributing to engineering culture and growth. - Experience in fast-paced startup or scaling environments. - Proactive in identifying architectural and systemic improvements. - Experience balancing team delivery accountability with individual technical contribution. - Experience leading teams in an Agile environment and using tools such as Jira to manage delivery, track progress, and communicate status effectively. - Prior experience in healthcare, life sciences, or regulated data environments is a plus. Bonus Skills - Experience building or supporting admin tools and internal platforms. - Experience with data observability, schema governance, or data lineage tooling. - Exposure to machine learning pipelines, business intelligence tools, or product instrumentation. - Familiarity with mobile development frameworks such as React Native or Capacitor. Benefits - Competitive Salary. - 100% Company-Paid Premiums for Employee’s Medical Health (HDHP 4500), Vision, and Dental Plans + $4,400 company sponsored contribution into an HSA. - Short-term and Long-term Disability. - Life Insurance. - 401k Matching. - Work from Anywhere within the US. - Flexible PTO. - 100% Paid Parental Leave. - Post-Parental Leave Program - $5k stipend to assist with expenses, 4 week 100% paid “Ease-Back” return to work transition period. - Charitable donation matching. Company Description At RxVantage, we're a small company with a big mission: to connect healthcare providers with the right life science experts and resources they need, exactly when they need them, to improve patient care. We’ve built a software platform that’s changing the way providers learn about the latest medical advancements and technologies. Every year, our platform powers over 1 million educational exchanges between medical practices and life science companies, making it easier for them to stay informed and provide better care. We have a proven product, a strong mission, and a passionate team. Now, we're looking for talented people to help us grow even more. If you're driven, eager to make an impact, and ready to be part of something meaningful, we want to hear from you! RxVantage is an equal opportunity employer and dedicated to ensuring that we represent the local communities where our health and wellbeing providers serve as pillars of support to our family, friends, and neighbors. Our representation within these communities allows us to embody a diverse set of backgrounds, experiences, abilities, and perspectives; and provide an inclusive environment for our team to feel empowered to be their authentic selves, without fear of harassment or discrimination.

United States
Natera logo

Senior Software Engineer

Natera

We are a global leader in cell-free DNA (cfDNA) testing, dedicated to oncology, women’s health, and organ health.

Full TimeRemoteTeam 1,001-5,000Since 2004H1B Sponsor

• Design and implement full-stack applications using React (frontend) and Python (backend), with a database primary data store. • Collaborate with scientists, laboratory operators, and business stakeholders to translate complex requirements into practical, production-ready software solutions. • Contribute to architectural decisions, system design reviews, and sprint planning within a collaborative software development team. • Ensure software meets the highest standards of robustness, performance, and compliance, adhering to regulatory requirements (e.g., ISO 13485, IEC 62304). • Follow software engineering best practices, including automated testing, CI/CD, and change management protocols. • Integrate cloud computing solutions (e.g., AWS or GCP) for data analysis, storage, and deployment. • Continuously improve existing codebases and internal development processes through refactoring and peer feedback. • Engage in cross-functional initiatives that span assay development, lab automation, and commercial software products.

United States
Job Closed
SentinelOne logo

Principal AI Software Engineer

SentinelOne

Secure your enterprise with the autonomous cybersecurity platform. Endpoint. Cloud. Identity. XDR. Now.

Full TimeRemoteTeam 1,001-5,000Since 2013H1B Sponsor

• Define and execute the technical roadmap for AI engineering, focusing on bringing the most recent advances in machine learning technology to help our customers efficiently discover and defeat threats. • Serve as a lead IC who also mentors across distributed teams, fostering a culture of technical excellence and continuous innovation. • Design and build net-new AI capabilities to be used across SentinelOne’s industry-leading cybersecurity platform. • Drive cross-functional collaboration across multiple engineering teams to ensure seamless integration and innovation in AI-powered cybersecurity products. • Oversee the establishment of best practices for MLOps, security, and performance monitoring to ensure the reliability and efficacy of our AI defense mechanisms.

United States
$224K - $308K / year
Job Closed