Senior Frontend Platform Engineer

We're Osome - an international fintech startup making the lives of entrepreneurs easier. We help thousands of businesses kick admin, accounting and bookkeeping out of their day-to-day, so they can spend more time on what's important to them. We've developed a unique solution that combines SaaS with a human-in-the-loop approach to provide full-fledged services in real-time.

We’re experiencing rapid growth in both client base and team, which now comprises around 500 people across our offices worldwide. As we continue to scale, we’re looking for more bright minds who are excited to make a real impact by solving complex problems.

What to expect:

• You’ll handle real client accounts, not dummy data

• Accuracy matters — mistakes don’t hide for long

• You’ll communicate with clients and internal teams regularly

If you want to build confidence, judgement, and ownership, it will be.

What you'll do:

⭐ Champion React frontend developer experience by architecting modern build toolchains, CLIs, and scaffolding tools that allow product engineers to spin up, develop, and deploy UI features with zero friction. 

⭐ Architect and maintain the frontend monorepo using tools like Nx or Turborepo, ensuring efficient dependency graph management, fast incremental builds, and scalable code sharing across applications. 

⭐ Standardize the frontend ecosystem by defining and automating code quality gates (ESLint, Prettier, commit hooks) and architectural patterns to ensure consistency across all client-side applications. 

⭐ Build and optimize CI/CD pipelines for frontend, implementing strategies for preview environments, automated visual regression testing, and reliable canary deployments. 

⭐ Develop the Design System infrastructure, creating the tooling and release strategies that allow UI component libraries to be consumed easily by multiple teams (using Storybook, changesets, etc.). 

⭐ Lead web performance initiatives, building observability tools to monitor Core Web Vitals, bundle sizes, and rendering performance, turning metrics into actionable engineering tasks. 

⭐ Create comprehensive documentation for frontend architecture, internal libraries, and development workflows, bridging the gap between complex platform tooling and daily product development. 

⭐ Mentor teams on modern web best practices, conducting workshops on React internals, state management patterns, and performance optimization to elevate the frontend engineering bar. 

⭐ Optimize the "local-to-production" loop, reducing build times and feedback cycles through caching strategies, remote execution, and ephemeral environments.

⭐ Articulate technical vision and roadmap for the frontend platform, translating technical debt reduction and tooling improvements into clear business value for stakeholders. ⭐ Evaluate and integrate next-gen frontend technologies, separating hype from value to keep our stack modern yet stable (e.g., evaluating Module Federation, Edge rendering, or new bundlers).

Who you are:

⭐ 5+ years of frontend platform experience, with a specific track record of building tooling or infrastructure that serves other frontend developers in a large-scale environment. 

⭐ Deep expertise in the modern frontend stack, particularly React and its internals, with a strong understanding of reconciliation, server-side rendering (SSR), and state management. 

⭐ Expert-level TypeScript proficiency, capable of writing complex generic utilities, custom type guards, and type-safe API clients that reduce cognitive load for product teams. 

⭐ Mastery of build tools and bundlers, with deep knowledge of how Webpack, Vite, Rollup, or RSPack work under the hood, and the ability to write custom plugins or optimizations. 

⭐ Strong background in monorepo architectures, understanding the complexities of workspace management, package linking, and dependency versioning at scale. 

⭐ Experience with frontend infrastructure on Cloud, particularly AWS (CloudFront, S3, Lambda@Edge) or modern hosting platforms, treating frontend infrastructure as code (IaC). 

⭐ Developer experience advocate who empathizes with the pain points of UI development and is passionate about automating away repetitive tasks. 

⭐ Proven ability to articulate technical direction, creating clear architectural decision records (ADRs) regarding frontend architecture and presenting strategies to technical and non-technical audiences. 

⭐ Exceptional documentation skills, able to create "golden path" guides, interactive documentation, and clear API references for internal libraries. 

⭐ Demonstrated execution discipline, capable of migrating legacy frontend systems to modern architectures without disrupting ongoing product delivery. 

⭐ Proficiency in testing strategies, encompassing unit (Jest/Vitest), integration, and E2E (Playwright) testing infrastructures\]

You’ll leave this role better than you started. That’s the goal.

Our Benefits 🙌

Osome grows alongside you, but we already have a few perks:

⭐ The opportunity to join a goal-driven startup with big ambitions

⭐ The chance to join a growing, highly-skilled R&D team, and to help shape and define the way we work

⭐ An agile working model focused on goals and performance

⭐ Quarterly social events

⭐ Learning opportunities and mentorship from peers and leaders, including a yearly continuous professional development budget.

Equal Opportunity Statement

At OSOME, creating a culture where individuals of all backgrounds feel comfortable really matters.

Everyone who applies will receive fair consideration for employment. We do not discriminate based upon race, colour, religion, sex, sexual orientation, age, marital status, gender identity, national origin, disability, or any other applicable legally protected characteristics in the location in which the candidate is applying. We want to ensure that we represent the diversity of talent in the society we live in today.

If you have any accessibility requirements that would make you more comfortable during the application and interview process, please let us know so that we can support you.