Source Job

• Design, develop, and maintain scalable, robust backend features and APIs using modern frameworks.
• Ensure high performance and reliability across our distributed systems.
• Contribute to systems powering authentication, billing, AI tooling, observability, connectors, and developer experience.

Mistral AI democratizes AI through high-performance, optimized, open-source and cutting-edge models, products, and solutions, with a comprehensive AI platform designed to meet enterprise needs. They are a dynamic and collaborative team passionate about AI, with a diverse workforce thriving in competitive environments and committed to driving innovation; their teams are distributed between France, USA, UK, Germany, and Singapore.

• Design, build, and ship backend services that support user-facing features across mobile and web experiences
• Collaborate closely with frontend engineers, product managers, designers, and data partners
• Lead backend technical planning and contribute to architecture decisions that improve scalability, reliability, and performance

OnePay is a consumer fintech that aims to improve financial systems for millions of Americans. They provide an all-in-one financial services platform, partnering with employers to deliver embedded financial services to employees and frontline workers.

• Lead, coach, and grow a team of backend engineers and an engineering manager.
• Own team execution and ensure meeting high standards for uptime, accuracy, and responsiveness.
• Guide technical strategy across legacy and next-generation pricing systems.

Jobgether is a platform that uses AI-powered matching to connect candidates with partner companies ensuring applications are reviewed quickly and fairly. They focus on identifying top-fitting candidates and sharing these with hiring companies for final decisions.

• Design & expand the backbone of our platform to scale to hundreds of thousands of merchants from all around the world
• Mentor other engineers to ensure their development & growth
• Improve engineering standards, tooling, and processes throughout the organization

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. The company is remote-first and offers competitive benefits that are anchored to their core value of people come first.

• Help drive backend architecture to the next stage of Roof’s systems
• Work in a fast-paced cross-functional team that values doing things ‘the right way’
• Contribute in an early-stage company with engineering first culture

Roofr is dedicated to providing customers with essential sales tools. They have built a CRM that connects solutions into a powerful platform and are a successful startup with best-in-class company metrics, offering its team significant growth and equity.

• Work alongside full-stack engineers to ensure product functionality is scalable and reliable.
• Partner closely with product and engineering teammates to design, build, and operate backend systems.
• Take ownership of backend and systems aspects of product features from early design through production and scale.

Vesta is rebuilding the mortgage LOS (Loan Origination System) from the ground up with an AI-augmented platform. They have raised $55M from top tier investors and value humility, empathy, self-awareness, and an orientation towards action on their team.

• Design, build and maintain complex backend systems
• Collaborate with other engineers, PMs and non-technical stakeholders to develop and ship features
• Find and solve performance issues

Ethos is a leading life insurance technology company transforming the life insurance experience for consumers, agents, and carriers. It is redefining how life insurance is bought, sold, and underwritten with its robust technology platform.

• Own the Workstream: You own projects from conception to deployment, translating high-level product goals into stable, scalable backend architecture.
• Master a Fluid Scope: Your work will span credit cards, loans, and foundational technical debt based on sprint needs and your own interests.
• Solve from First Principles: You articulate the root cause, define the trade-offs of various solutions, and implement the one that serves our customers best.

Tilt is creating a new credit system that backs the working, whatever they're working toward. They have extended $4.5B+ in credit by trusting that people are "good for it."

• Lead the design and delivery of platform services and libraries that teams across Jane adopt and rely on, balancing transformational work with new capability building.
• Drive improvements to the main Rails monolith - upgrading dependencies, improving architecture, and raising code quality standards so teams can move with confidence.
• Partner with feature teams to understand their needs, propose scalable solutions, and mentor them through implementation, removing blockers along the way.

Jane is a founder-led, high-growth SaaS company that builds products and tools for clinics to run their businesses and care for their patients. They are a team of more than 700 people working remotely across Canada, the US, and the UK, and embrace the possibilities of AI.

• Design and build the backend systems that power real-time document collaboration — conflict resolution, operational transforms or CRDTs, and state synchronisation
• Build commenting, tagging, and notification systems that support async and real-time team workflows
• Improve the reliability and scalability of Slate’s existing backend systems

Slate is the creative workspace for brand social teams. They help teams create and ship on-brand content fast with an all-in-one editor, built-in asset management, and seamless creative file workflows. Teams across top sports leagues and global brands like Amazon and Hoka use Slate every day to elevate their social presence.

• Lead the design of distributed systems and data models, ensuring the Java Spring Boot environment can support rapid scaling and feature expansion.
• Take full accountability for the end-to-end delivery of major cross-functional product updates, managing the release lifecycle and ensuring high-impact features are deployed reliably.
• Proactively leverage AI tools (e.g., Claude) to complement your workflow and increase velocity, while retaining total ownership over the logic, security, and architectural implications of the code.

Archy is transforming the way dental practices operate with its vertical SaaS solution that provides cutting-edge tools. They are looking for passionate engineers to join their growing team.

• Architect, design, and evolve backend systems, platform services, and APIs using Python and related technologies.
• Partner closely with data scientists and machine learning engineers to productionize AI/ML capabilities and integrate models into reliable backend infrastructure.
• Design and scale distributed systems that process large volumes of data with strong performance, availability, and operational excellence.

Webflow is building the world’s leading AI-native Digital Experience Platform as a remote-first company. They empower teams to design, launch, and optimize for the web without barriers, from entrepreneurs to global enterprises.

• Design, build, and maintain features for the domain applications.
• Provide technical leadership and manage dependencies.
• Conduct design and code reviews.

Yassir is the leading super App in the Maghreb region, changing how daily services are provided. They operate in 45 cities across Algeria, Morocco, Tunisia, France, Canada, and Sub-Saharan Africa, backed by VCs with ~$200M in funding, offering on-demand and financial services.

• Design, develop, and maintain scalable and high-performance backend systems using .NET technologies
• Contribute to system architecture decisions and lead the design of microservices-based solutions
• Build and maintain RESTful APIs and ensure high availability and performance

Commencis has more than two decades of expertise in experience design, software engineering and cloud technologies. Their products and solutions are used by leading brands in financial services, insurance, airlines and retail in more than 20 countries. They value collaboration, curiosity, and an open mindset at work.

• Work on core enterprise platform systems, focusing on backend services that ensure Synthesia is secure, reliable, and scalable.
• Contribute to distributed backend systems and shared platform services, and be responsible for the safe and reliable operation.
• Evaluate your work through system health and reliability metrics, leveraging observability and monitoring to ensure systems meet expectations.

Synthesia is the world’s leading AI video platform for business, used by over 90% of the Fortune 100. Following a recent Series E funding round where they raised $200 million, their valuation stands at $4 billion and their total funding exceeds $530 million.

• Design and implement robust, scalable, and maintainable backend systems, primarily using Ruby on Rails.
• Develop and integrate APIs that enable secure, efficient, and reliable communication between backend services and external systems.
• Take ownership of backend features and functionality, contributing to development from design through deployment.

NovoEd is an enterprise learning platform that helps organizations build critical capabilities at scale through collaborative and experiential learning. Founded in 2012 out of Stanford’s Social Algorithm Laboratory, NovoEd has grown into a trusted partner for many of the world’s leading companies, executive education providers, and training organizations.

• Design and implement scalable, secure, and maintainable backend systems primarily using Ruby on Rails.
• Lead the architecture and development of backend services with a strong focus on performance, reliability, and long-term maintainability.
• Identify systemic technical debt, architectural constraints, or operational inefficiencies that slow development or impact customer experience, and lead cross-team efforts to address them.

NovoEd is an enterprise learning platform that helps organizations build critical capabilities at scale through collaborative and experiential learning. Founded in 2012 out of Stanford’s Social Algorithm Laboratory, NovoEd has grown into a trusted partner for many of the world’s leading companies, executive education providers, and training organizations.

• Work with a team of engineers to build, maintain, and scale Affirm's critical experimentation, feature flag, and feature store infrastructure serving millions of customers.
• Ship code and monitor the deployment of your work, contributing to the team's projects and goals.
• Work collaboratively and proactively with the team and stakeholders, creating visibility and dialog regarding the risks and trade-offs.

Affirm is reinventing credit to make it more honest and friendly, giving consumers the flexibility to buy now and pay later without any hidden fees or compounding interest. They are a remote-first company where the majority of their roles are remote and you can work almost anywhere within the country of employment.

• Architect, develop, and maintain scalable, robust backend services, starting from our voice and chat AI applications, built on our PHP monolite.
• Coordinate and guide a small team of Engineers.
• Experiment with new technologies to achieve real-time and seamless integrations, implementing POCs to try the latest trends in AI environment, partnering with AI/LLM engineers.

Tuotempo transforms healthcare experiences through intelligent digital solutions. It's a trusted patient engagement platform powering some of Europe and Latin America's leading healthcare institutions. They have a remote-first culture with hubs in Bologna or Barcelona.

• Work on initiatives to design, build, and maintain scalable microservices primarily using Kotlin.

Pleo builds spend solutions that make managing money seamless. They are a driven, progressive, and kind bunch of 850+ people from over 100 nationalities, all committed to delivering the future of business spending, together.