Mid-Level Full-Stack Engineer

On behalf of our client, a payment-provider orchestration company, we are looking for a Mid-Level Full-Stack Engineer to join their growing engineering team. About Our Client Our client is building a payment-provider orchestration platform that helps businesses integrate, manage, and switch between payment services without rebuilding their systems each time. They value thoughtful engineering, simple solutions, open communication, and products that work reliably. Their engineers contribute across the whole product lifecycle — shaping requirements, weighing technical trade-offs, building, testing, and deploying. If you want to work across the full stack, take real ownership, and help shape a growing fintech product, we would like to hear from you. The Role We are looking for a Mid-Level Full-Stack Engineer to build and own reliable web applications across the frontend, API, and data layers. You will work mainly in TypeScript, React, Next.js, Node.js, and PostgreSQL, in close collaboration with product, design, and other engineers. You will own meaningful parts of features end to end — from shaping the requirement to running it in production — with support and technical guidance from the team. This is a role with room to influence how the team builds. As the product and team grow, you will be expected to help shape engineering practices, not just follow them. Their Stack TypeScript · React · Next.js · Tailwind CSS · Node.js · Express · PostgreSQL · Drizzle ORM · Zod · AWS · Git AI tooling: Claude Code CLI · Codex CLI · AI-assisted code review How They Work with AI AI-assisted development is part of how the team builds, not an optional extra. Their engineers use agentic coding tools such as Claude Code CLI and Codex CLI every day — to write and refactor code, explore unfamiliar parts of the codebase, generate tests, and support code review. They also build AI-driven features into the product itself, so you will work with AI frameworks and APIs as part of normal engineering work. At this level, more than usage is expected. You should have a clear view of where these tools add real leverage and where they introduce risk, hold a high bar when reviewing AI-generated code, and help the team develop sensible practices around AI-assisted development. Prior experience with specific tools is welcome but not essential — a real willingness to work this way is. What You Will Do Build product features end to end in TypeScript, React, Next.js, and Node.jsCreate responsive, accessible, and polished user interfacesDesign and integrate REST APIs with ExpressModel and query relational data with PostgreSQL and Drizzle ORMDefine and validate application boundaries with ZodWork with product, design, and engineering to shape features, not just implement themWrite unit, integration, and end-to-end testsUse AI coding tools such as Claude Code CLI and Codex CLI in your daily workflow, and apply a high bar when reviewing their outputWork with AI frameworks and APIs as the team builds AI-driven capabilities into the productHelp shape how the team uses AI-assisted development effectively and safelyTake part in code reviews, technical discussions, and deploymentsImprove the performance, reliability, and maintainability of the applicationsHelp raise engineering standards as the product and team grow What You Will Bring Typically 2–5 years of professional software development experience, or equivalent practical experienceStrong TypeScript skills, with React or another modern frontend frameworkBackend experience with Node.js and REST APIsExperience with PostgreSQL or another relational databaseA track record of delivering features across frontend, backend, and persistence layersA solid grasp of HTTP, data modelling, validation, and error handlingExperience writing automated tests and working in Git-based workflowsGenuine openness to AI-assisted development — working daily with agentic coding tools such as Claude Code CLI or Codex CLI, and with AI frameworks in the productThe judgement to review AI-generated code rigorously and full ownership of anything you submitSound technical judgement, strong problem-solving skills, and a high bar for qualityThe ability to work independently, communicate clearly, and ask the right questions earlyClear written and spoken English What's on Offer Meaningful ownership — take features from initial requirement through to productionRoom to influence — contribute to product decisions and the technical direction of a growing platformPrivate health insurance — support for your health and wellbeingLearning budget — for courses and certificationsModern tooling — paid access to leading AI coding tools and everything else you need to do your best workTechnical breadth — frontend, backend, databases, testing, and cloud infrastructureHigh standards, light process — thoughtful engineering without unnecessary bureaucracyA collaborative team — open communication, honest feedback, and room for different perspectives