Senior Node.js Developer (UK)

Flosum is a bootstrapped, profitable B2B SaaS company building the leading Salesforce-native DevSecOps, Data Protection, and Security platform. Our solutions are trusted by Fortune 500 enterprises in the most heavily regulated industries on the planet — financial services, healthcare, government, and insurance.

We’re not a startup burning cash and chasing vanity metrics. We’re a proven, scaling business that reached profitability on our own terms. As a Salesforce Summit Partner and Innovation Award winner, we’ve earned our seat at the table alongside the biggest names in enterprise software.

Built 100% on the Salesforce platform. Serving enterprises that demand zero compromise on security, compliance, and reliability.

We are entering an aggressive growth phase — expanding our product surface, deepening our platform capabilities, and accelerating our delivery velocity. We need senior-caliber Node.js developers who can own significant parts of our architecture and ship production code that enterprise customers depend on daily.

This is not a staff augmentation seat. You will work directly with engineering leadership, product managers, and the CEO. Your decisions will have real consequences, your opinions will be heard, and your craftsmanship will be visible to the customers who rely on our platform.

High-performance backend services and APIs powering enterprise-grade SaaS applications

Scalable, secure Node.js micro services and integrations within the Salesforce ecosystem

Modern front-end experiences using Vue.js and TypeScript that serve demanding enterprise users

CI/CD pipeline tooling, automation frameworks, and developer productivity infrastructure

Real-time data processing and event-driven architectures handling sensitive enterprise data at scale

Salesforce development experience: Apex, Lightning Web Components (LWC), Visualforce, or Salesforce API integrations. If you know both Node.js and Salesforce, you are a rare and extremely valuable candidate to us.

Experience building or contributing to Salesforce ISV (AppExchange) products.

Vue.js front-end development experience, particularly with Vue 3 Composition API and state management.

Experience working in B2B SaaS companies serving enterprise customers with strict compliance requirements (SOC 2, HIPAA, FedRAMP, GDPR).

Familiarity with DevOps/DevSecOps toolchains and practices in the Salesforce ecosystem.

Skills get you in the door. Mindset determines whether you thrive here:

Missionary, Not Mercenary

You care about what you’re building and why. You take ownership not because someone assigned it to you, but because that’s who you are. When something is broken at 2 AM, you don’t check whether it’s “your responsibility” — you fix it.

Builder, Not a Bystander

You don’t wait for perfect specifications. You dig in, ask hard questions, propose solutions, and ship. You would rather have a working prototype by Friday than a polished slide deck by next quarter.

Craftsperson Under Pressure

Enterprise customers depend on our uptime and data integrity. You write code that doesn’t just work — it survives. You understand that in regulated industries, your code is your reputation.

Direct Communicator

You say what you think, respectfully and clearly. If a technical decision is wrong, you speak up — regardless of who made it. We value candor over politeness-at-the-expense-of-quality.