Senior Frontend Engineer (Next.js/React Native/TypeScript)

Short summary (Job summary)

Senior Frontend Engineer

You will design and build modern, scalable applications across web and mobile, integrating payments and DocuSign flows.

full-remote

Role & responsibilities

• Develop and maintain modern, responsive

  web interfaces

  using

  Next.js

  ,

  TypeScript

  ,

  TailwindCSS

  ,

  SWR

  and

  Shadcn UI

  , based on Figma designs.
• Develop and maintain

  mobile applications

  using

  React Native

  , ensuring high performance and native-feeling UX on both iOS and Android.
• Ensure pixel-perfect implementation and adherence to the design system across web and mobile components.
  
• Define and evolve the

  frontend architecture

  for both web and mobile, choosing patterns and best practices for state management, performance and scalability.
• Design and implement navigation flows (routing, stacks, deep links) to provide consistent, smooth user journeys across platforms.
  
• Collaborate with backend engineers to design and consume APIs (REST/GraphQL): endpoints, contracts, validation, error handling, versioning and documentation.
  

• Integrate and maintain DocuSign workflows

  (templates, envelopes, signing flows, webhooks) within web and mobile applications.

• Integrate and maintain payment gateways

  such as

  Stripe

  (preferred) or other providers (Razorpay, Braintree, etc.), handling secure payments, webhooks and error scenarios.
• Work with

  Supabase (PostgreSQL, Storage)

  and

  Drizzle ORM

  to design and consume data models from the frontend.
• Implement robust authentication flows using

  BetterAuth

  (dbSession + cookies), ensuring security and a smooth user experience.
• Configure and maintain

  CI/CD pipelines

  (GitHub, Vercel and mobile build workflows), managing development, staging and production environments.
• Manage builds and releases of

  React Native apps

  to the

  Apple App Store

  and

  Google Play Store

  , including signing, provisioning and configuration.
• Own deployments on

  Vercel

  for web applications, ensuring reliability, scalability and traceability of releases.
• Write

  clean, testable and secure code

  , including unit and integration tests where appropriate.
• Perform

  code reviews

  , refactors and continuous improvements to keep the codebase healthy.
• Monitor and optimize performance, identifying and fixing bottlenecks and bugs before they impact users.
  
• Actively participate in

  Agile ceremonies

  (planning, estimations, retrospectives), helping define roadmap, milestones and sprint scope.
• Ensure technical and visual consistency across products, in close collaboration with designers, backend developers and project managers.

Preferred candidate profile

• 5+ years

  of experience as a Frontend / Web Engineer.
• Strong hands-on experience with

  TypeScript

  and

  JavaScript (ES6+)

  .
• Solid production experience with

  Next.js

  for modern web applications.
• Solid production experience with

  React Native

  for mobile apps (iOS and Android).
• Proven track record of shipping

  React Native apps

  to the

  App Store

  and

  Google Play

  (or equivalent app store release experience).
• Excellent knowledge of

  HTML5, CSS3, responsive design

  and modern CSS methodologies (TailwindCSS or similar utility-first frameworks).
• Experience with

  state management

  and data-fetching patterns (e.g.

  SWR

  , React Query or similar).
• Proven experience working with

  design systems

  and building reusable UI component libraries (Shadcn or equivalent).
• Strong experience integrating

  RESTful APIs

  and handling authentication, authorization and error states on the frontend.

• Proven, hands-on experience integrating DocuSign

  (or similar e-signature platforms) into production applications.

• Hands-on experience integrating payment gateways

  , preferably

  Stripe

  , but also other providers (Razorpay, Braintree, etc.).
• Experience with

  Supabase (PostgreSQL, Storage)

  and ORMs (preferably

  Drizzle

  ) or similar backend-as-a-service stacks.
• Experience with authentication frameworks (ideally

  BetterAuth

  , or similar session/cookie-based solutions).
• Very good knowledge of

  Git

  and

  GitHub

  workflows (branching, PRs, code review, basic CI/CD).
• Experience with

  cloud hosting and deployment

  (Vercel or similar platforms).
• Familiarity with

  testing and validation tools

  (unit, integration, API testing).
• Experience working with

  Figma

  and collaborating closely with designers.
• Experience with issue tracking tools (Linear, Jira, etc.).
  
• Solid understanding of

  Agile methodologies

  and iterative development practices.
• Proven experience delivering projects from initial design all the way to production.
  
• Strong problem-solving skills and extreme attention to detail.
  
• Good communication skills in

  English

  , both written and spoken.