Fullstack Developer (React/Go)

Location: Paris, France; hybrid schedule with 3 days in the office and 2 days working from home, plus 4 weeks of remote work per year.

Company

Builds authentication and user-onboarding products that optimize OTP delivery across SMS, WhatsApp, and other channels while preventing spam and fraud.

What you will do

• Build polished, high-performance user interfaces with React and TypeScript, emphasizing usability, speed, and design quality.
• Own features end to end across the React frontend, Go backend, APIs, and data layer.
• Develop distributed systems using Go, DynamoDB, SQS, Redshift, and AWS Lambdas.
• Design and build the next version of the authentication API, along with internal tools and dashboards.
• Help deploy and scale fraud-prevention models for large customers.
• Support clients, develop features around their needs, and participate in on-call rotations.

Requirements

• Strong experience building frontend applications with React or a comparable modern framework.
• Solid backend skills in Go or TypeScript, including reliable API and service design.
• Experience working across the full stack, from user interfaces to infrastructure.
• Strong product and UX awareness, with a preference for simple, scalable solutions.
• Product-led mindset and focus on measurable impact.
• Fluent or professional English required.

Nice to have

• Experience with Rust, gRPC, or AWS serverless services such as Lambda, DynamoDB, and SQS.

Culture & Benefits

• Flat organization with a focus on impact, quality, speed, ownership, and in-person collaboration.
• Competitive compensation package with BSPCEs.
• Travel to the office fully subsidized.
• Health insurance through Alan and Urban Sports Club membership.
• Company-provided laptop and phone, meal vouchers, office snacks and drinks, and an annual offsite.

Hiring process

• Talent team meeting.
• Technical assessment.
• In-person system design and coding interview, followed by a final meeting with the CEO.