Senior Go Backend Engineer — Build Scalable, Secure APIs

Prelude; Paris; Hybrid; EUR 90,000 - 130,000; Full time

Benefits offered by this job

BSPCEs

Paris office + WFH 3+2 days per week

Health insurance (Alan)

Gym membership (Urban Sports Club)

Meal vouchers (Swile)

Free snacks and drinks in the office

Annual offsite

Laptop & phone provided

Job summary

Prelude is redefining how companies authenticate and onboard users. Our flagship product delivers OTP codes with market-leading price-to-conversion ratios, dynamically selecting the best channel in real time while blocking spam and fraud.

We are 60+ strong, based in Paris, and expanding across Europe and the US. Join a flat, collaborative team building a scalable platform with Go, DynamoDB, SQS, Redshift, and Lambdas, plus a modern frontend stack.

Qualifications

• Strong coding skills in Go; knowledge of Rust/TypeScript is a plus.
• Experience designing and engineering large-scale distributed systems.
• Fluent/professional English; international team.
• Front-end experience with modern frameworks is a plus.

Responsibilities

• Build and scale a distributed system using Go, DynamoDB, SQS, Redshift and Lambdas.
• Develop a snappy full-stack app with Next.js on Vercel and gRPC.
• Improve the Prelude API for usability, performance and functionality.
• Ensure services are scalable, extensible, reliable, and fast.
• Collaborate with clients to build features around their needs.
• Participate in on-call rotations to maintain API stability.

Skills

Go

Distributed systems

Rust

TypeScript

gRPC

API design

Frontend frameworks

Tools

DynamoDB

SQS

Redshift

AWS Lambda

Next.js

Job description

Prelude is redefining how companies authenticate and onboard users. Our flagship product delivers OTP codes with market-leading price-to-conversion ratios, dynamically selecting the best channel in real time while blocking spam and fraud.

We are 60+ strong, based in Paris, and expanding across Europe and the US. Join a flat, collaborative team building a scalable platform with Go, DynamoDB, SQS, Redshift, and Lambdas, plus a modern frontend stack.