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Canada Unlimited PTO

  • Design, develop, test, and maintain internal integrations, tools, and solutions to enhance efficiency across Fullscript’s technical stack.
  • Build scalable applications, APIs, and integrations to support business growth and streamline operations.
  • Take ownership of features from planning to deployment, mentor peers, and advocate for high-quality, maintainable code.

Ruby Ruby On Rails Javascript React CSS

20 jobs similar to Senior Developer, Fullstack - Business Systems Engineering

Jobs ranked by similarity.

$178,400–$223,000/yr
United States

  • Define the long-term technical vision and architectural roadmap for FuzeRx's B2B and consumer platforms.
  • Lead by example by writing clean, optimized, and maintainable code for critical system components.
  • Act as a force multiplier across multiple agile squads, tackling complex distributed systems challenges.

Fuze Health puts patients first by digitally connecting them with care providers, health resources, and treatments, while enabling partners to enhance quality and outcomes. The company is a growing portfolio of industry leaders including LetsGetChecked, Truepill, and Alto Pharmacy, with a shared vision to deliver next-generation healthcare solutions.

North America

  • Work with product, UX, and fellow developers to gain a deep understanding of customer problems and lead development of features to solve those problems.
  • Hold a high bar of personal technical excellence, demonstrated through high quality, thoroughly tested, and exemplary code contributions and reviews.
  • Contribute to our culture of "you build it, you own it" by identifying tech debt and opportunities to improve technical architecture.

OpsLevel is the leading internal developer portal designed to help engineering teams build, ship, and maintain software better. They are a fully-remote team of individuals who care deeply about developer experience, with members across North America and a strong emphasis on culture and values.

Canada UK Unlimited PTO

  • Develop, ship, and maintain features for Agentic Tools across the GitLab monolith backend in a secure, well-tested manner.
  • Collaborate with Product Management, UX, and AI specialists to refine requirements and deliver high-quality product enhancements.
  • Design and review GraphQL and REST APIs, ensuring reliability, scalability, and clear contracts with frontend clients.

GitLab is the intelligent orchestration platform for DevSecOps, enabling organizations to increase developer productivity and accelerate digital transformation. With over 50 million users and a high-performance culture driven by values and continuous knowledge exchange, GitLab empowers team members to reach their full potential.

$81,000–$135,000/yr
Netherlands 4w PTO

  • Build and scale high-performance backend systems using Ruby on Rails and modern technologies.
  • Collaborate with product managers and cross-functional teams to deliver impactful features.
  • Influence architecture, technical strategy, and engineering practices in a fully remote environment.

Our partner company builds and scales AI-powered products used by millions worldwide. It is a fast-growing technology environment with a fully remote, autonomous culture focused on speed, quality, and continuous innovation.

US 12w maternity 12w paternity

  • Manage the technical aspects of feature development for the Portal, including UX/UI and API work.
  • Develop high-quality software, designs, and architecture, setting the standard for team excellence.
  • Collaborate with Growth teams to build and optimize data-driven features, experiments, and user flows.

We were founded in 2015 by former NSA cyber operators to make enterprise-grade cybersecurity accessible to businesses of all sizes. We now secure over 5 million endpoints and 11 million identities worldwide with a remote-first team and a 24/7 human-led SOC.

Philippines

  • Participate in agile ceremonies and own features from design to deployment across a full stack.
  • Build backend with Ruby (Rails), frontend with Angular and TypeScript, and optimize MySQL databases.
  • Mentor teammates, lead code reviews, leverage AI tools, and maintain high quality without a dedicated QA team.

Sharesource is a BCorp company that democratises opportunities for individuals from developing countries by scaling teams for Australian and Canadian businesses. While employee count is not specified, the culture emphasizes diversity, inclusion, proactive thinking, and a supportive environment.

US Unlimited PTO

  • Spearhead design, development, and maintenance of front-end and back-end applications using Ruby on Rails and Python FastAPI.
  • Regularly deploy via Infrastructure as Code with Terraform and own the full SDLC from ideation to monitoring.
  • Create comprehensive tests, lead code reviews, mentor junior engineers, and stay current with industry trends.

Bluesight creates groundbreaking solutions that increase efficiency, safety and visibility for health systems, hospital pharmacy, and pharmaceutical manufacturers. We empower customers to deliver the right medicine to the right patient at the right time, and we are a high-growth healthcare IT company with a startup vibe and over 3,000 customers.

India

  • Develop and enhance fullstack features that ingest, model, and synchronize data into scalable platforms.
  • Build integrations with external platforms and contribute to dashboards and reporting solutions.
  • Design and implement secure backend services and APIs while supporting AI-enabled workflows.

The company builds data-driven products that transform software development insights into actionable intelligence. It operates in a fast-paced, highly collaborative environment with a globally distributed team.

US Canada Mexico 4w PTO 16w maternity 4w paternity

  • Design and implement features for the Marketplace, including shop integrations and Fleetio Pay.
  • Collaborate with Product Managers, Designers, and Engineers to deliver scalable, high-quality software.
  • Write maintainable, well-tested code and participate in code reviews to ensure quality and consistency.

Fleetio is a modern software platform that helps thousands of organizations worldwide manage their fleet operations. We raised $450M in Series D funding in March 2025 and are a proud founding member of the Rails Foundation, with a fast-paced, collaborative culture.

US

  • Lead design and implementation of backend services for large-scale, data-rich healthcare applications.
  • Drive architecture decisions for integrations with third-party data sources and APIs.
  • Mentor engineers and elevate engineering standards through design reviews and operational excellence.

Omada Health is reverse engineering healthcare delivery in America, focusing on chronic conditions like obesity, diabetes, and hypertension. They are a publicly traded company (Nasdaq: OMDA) that has served over two million members and employ a virtual-first model with human-led care teams.

US Unlimited PTO

  • Own features end-to-end—data model, Rails API, and front end—in a fast-paced agile environment.
  • Build product surfaces on top of LLMs and agents: ingestion, structured data, and UIs for reviewing and verifying AI-generated output.
  • Partner with a team lead or AI Engineer to take greenfield problems from ambiguous idea to shipped feature.

ApartmentIQ is an all-in-one data platform powering smarter decisions across multifamily properties, covering 40M units. We are a fully remote team of 100+ with a strict no a**holes policy, profitable and growth-stage.

US Unlimited PTO

  • Design, build, and test APIs and services that power RoadieXD, Roadie's cross-dock solution.
  • Develop internal and customer-facing tools in React to enable cross-dock operations to scale efficiently.
  • Partner with Engineering, Product, and Operations to solve complex logistics challenges and influence technical direction.

Roadie is a logistics and delivery platform that helps businesses manage complex retail delivery needs. A UPS company with over 310,000 independent drivers nationwide, it focuses on scalability and flexibility in a fast-paced environment.

US

  • Design, develop, and maintain end-to-end Showcase solutions using Ruby on Rails, driving technical direction and architectural improvements.
  • Partner with Product and engineering teams to translate roadmap goals into scalable, well-scoped technical work.
  • Lead through influence, mentor engineers, and raise the bar for engineering quality by setting standards for excellence.

Huntress is a cybersecurity company that makes enterprise-grade security accessible to all businesses, founded in 2015 by former NSA cyber operators. As a remote-first team, they secure over 5 million endpoints and 11 million identities worldwide, backed by a 24/7 human-led SOC.

$44,450–$63,500/yr
UK 6w PTO

  • Build and improve real, user-facing features alongside senior engineers and tech associates
  • Write clean, readable, well-tested code, learning our standards and patterns as you go
  • Take small tasks and slices of work from start to finish, raising blockers early

Healios digitises clinical pathways to provide neurodevelopmental and mental health services to children and families. They are a remote-first organisation that embraces diversity and values integrity, listening, and courage.

$204,000–$226,000/yr
US Unlimited PTO

  • Set technical direction across multiple domains, owning complex work like greenfield service design and large refactors while producing clear documentation.
  • Act as a senior technical authority for security and compliance, partnering on SOC2, vulnerability management, and threat modeling.
  • Lead AI-native engineering practices, designing agentic workflows and coaching engineers to collaborate effectively with AI systems.

Pathstream reshapes how frontline employees and managers excel in their careers through enterprise partnerships, transforming teams from transactional to strategic. The company is a tight-knit, mission-driven team of ~60 employees scaling solutions to improve productivity and retention.

$175,000–$210,000/yr
Global

  • Build and maintain registration, onboarding, checkout, and conversion flows that move visitors to activated, paying members.
  • Own integrations across the funnel: payment platforms, lifecycle messaging, and product analytics, including webhook handlers.
  • Contribute to ongoing payments migration and work across the stack: React/TypeScript front end and Ruby on Rails back end.

Boldin is a comprehensive financial planning platform that helps people understand their financial picture and make smarter decisions with their money. With over $20M raised, they are in a pivotal growth phase with a mission-driven culture.

US Canada Mexico 4w PTO 16w maternity 4w paternity

  • Collaborate with Product Managers, Designers, and Data Ops to research, plan, and build features that drive user adoption.
  • Create user experiences and run experiments to increase engagement from trial users.
  • Build systems for customized onboarding and improve feature areas to reduce churn.

Fleetio is a modern software platform that helps thousands of organizations worldwide manage their fleet operations. The company has raised $450M in Series D funding and is on an exciting trajectory with a strong engineering culture.

$130,000–$180,000/yr
United States Canada Unlimited PTO 12w maternity 12w paternity

  • Design, build, and maintain full-stack features that solve real customer problems for transit agencies.
  • Partner with Product, Design, and Engineering to validate customer needs and technical approaches.
  • Apply modern software engineering practices, prototype rapidly, and uplevel teammates through code reviews and pairing.

We are the leading transit data platform helping cities move more efficiently by providing real-time passenger information and improving service performance. Over 200 transit agencies in 12 countries rely on us to improve on-time performance by up to 40%, and we are a fully distributed team of mission-driven professionals.

India

  • Develop clean, secure, and efficient Ruby on Rails code for production-grade applications.
  • Collaborate with stakeholders, designers, and QA to gather requirements and deliver robust solutions.
  • Optimize applications for scalability and performance with full lifecycle involvement.

Jobgether is a platform that uses AI-powered matching to connect candidates with hiring companies. They focus on objective and fair candidate review, serving a range of clients from startups to enterprises.

Latin America

  • Elevate the UX by leading frontend architecture of payment systems, ensuring intuitive, responsive, and robust interfaces.
  • Bridge the Stack by designing and maintaining frontend/backend integrations with payment processors across Latin America.
  • Build for Resiliency by writing clean, observable, and secure code that handles sensitive financial data reliably.

Clara is the fastest-growing company in Latin America, providing the leading solution for companies to make and manage all their payments. Backed by top global and regional investors, we are building the financial infrastructure that powers high-performing organizations across the region with a passionate and committed team distributed across the Americas.