Plentific - Senior Frontend Engineer
Requirements
• Expert-level TypeScript and modern JavaScript, with deep command of React and the patterns around it, including data fetching, routing, and component libraries. • Strong software engineering fundamentals, including design patterns, testing, debugging, and code that stays readable and extendable at scale. • Sound grasp of UI, UX and accessibility considerations, with the judgement to improve a design before building it rather than implement it exactly as drawn. • Demonstrable experience diagnosing and fixing page load, rendering, and other frontend performance problems. • Working knowledge of frontend observability with Sentry, Grafana logs, or New Relic, and of CI/CD pipelines such as GitHub Actions or ArgoCD. • Practical awareness of common frontend security risks, including XSS and CSRF, and how to design against them. • Strong working fluency with agentic coding tools and spec-driven development workflows, including specification writing, code generation, test generation, and critical review. • Clear communication, with the ability to articulate technical concepts and trade-offs in plain English. • High ambition and a strong sense of urgency, with the drive to deliver an ambitious product roadmap at pace using AI, and a positive, can-do attitude. • 6+ years of professional software engineering experience, including 5+ years of commercial React and TypeScript. • Experience shipping and operating production frontends for customer-facing SaaS products, including monitoring, incident response, and performance improvement. • Experience working in a large, long-lived codebase where design patterns, testability, and maintainability genuinely matter. • Experience consuming and shaping REST APIs in a service-oriented architecture, ideally backed by Django REST Framework or an equivalent. • Experience working in cross-functional teams with product managers and designers on shared customer outcomes, not only technical delivery. • Experience using AI coding tools in a professional software delivery workflow, ideally within a spec-driven development framework.
Responsibilities
• Frontend Engineering • Build and maintain product interfaces in TypeScript, React, TanStack Query, React Router, MaterialUI and BaseUI across our web applications. • Translate product requirements and design concepts into technical documents that set out scope, system behaviour, edge cases, and high-level technical analysis. • Design component APIs, state management, and data-fetching patterns that stay readable and extendable as the codebase grows. • Integrate against REST APIs in a service-oriented architecture, shaping the contracts with backend engineers rather than accepting whatever is offered. • Review, refactor, and retire existing code so it meets the requirements of improved or new features. • Performance, Quality, and Reliability • Diagnose and resolve page load, rendering, and other frontend performance problems. • Write unit, integration, and end-to-end tests that give the team confidence to ship frequently. • Instrument frontend observability with tools such as Sentry, Grafana Logs or New Relic, and act on what they show. • Debug and fix production issues across our applications, including the integration points where frontend and backend behaviour diverge. • Design against common frontend security risks, including XSS and CSRF. • Agentic and Spec-Driven Development • Turn ambiguous product ideas into implementation-ready specs, including user flows, component behaviour, edge cases, acceptance criteria, and test expectations. • Prototype interfaces and interaction quickly, using working software to test feasibility and product value before committing to larger delivery. • Use agentic coding tools such as Codex, Claude Code, Cursor, or equivalent to generate, refactor, test, and review code within clear technical constraints. • Evaluate AI-generated code critically for correctness, maintainability, security, performance, accessibility, and fit with Plentific's architecture. • Improve the team's spec-driven development practice through reusable prompt patterns, review checklists, examples, and lightweight documentation. • Collaboration and Craft • Partner with product managers, designers, and backend engineers from problem framing through release, applying engineering judgement to improve the user experience before implementation starts. • Collaborate with other engineers through code review and pair programming. • Define and communicate frontend standards and best practice, and hold the team to them in review. • Write concise technical documentation covering components, algorithms, APIs, and operational handover. • Articulate technical trade-offs in plain English to technical and non-technical colleagues, including when scope, quality, or delivery timing needs to change.
Benefits
• A salary package aligned to the role and market • 25 days annual holiday, plus one additional day for every year served, up to a maximum of 5 additional days • Fully remote working, including the option to work abroad • Private healthcare for you and your immediate family, with discounted gym membership and access to optical, dental, and private GP services • Enhanced parental leave • Employee assistance programme • Company volunteering day and charity salary-sacrifice scheme • Learning management system powered by Udemy • Referral bonus and charity donation when someone you introduce joins the company • Season ticket loan, Cycle to Work, electric vehicle, and Techscheme programmes • Company-sponsored dinners and social gatherings
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