Senior Backend Developer

Xpate; United States; Hybrid; USD 120,000 - 180,000; Full time

Benefits offered by this job

Private health insurance

Paid time off

Apple gear

Hybrid/Remote options

Job summary

xpate is hiring a hands-on Backend Developer to build and ship production serverless services for a fintech platform. You’ll work with Lambda-first microservices, type-safe REST APIs, and data modeling in DynamoDB and PostgreSQL.

Use AWS tools, Serverless Framework, and a modern toolchain to ensure observability, tests, and quality while shipping features quickly in a hybrid/remote setup.

Qualifications

• Hands-on backend engineering experience in TypeScript/Node.js.
• Real AWS production experience: built, operated, debugged, and fixed systems.
• Ability to ship fast without sacrificing quality with clean code and solid fundamentals.
• Daily use of AI tools to accelerate coding and debugging.
• English at least B2+ level in a team environment.

Responsibilities

• Build and evolve Lambda-first microservices that handle real money flows and integrations.
• Design REST APIs with type-safe schemas and contracts that don’t rot.
• Model data in DynamoDB first, using PostgreSQL where relational fits.
• Ship event-driven workflows with SQS/EventBridge/Step Functions: retries and idempotency.
• Ensure observability: structured logging (Winston) and tracing (AWS X-Ray).
• Write tests that protect releases (Mocha/Sinon) and reduce regressions.

Skills

TypeScript

Node.js

Backend development

REST API design

English communication

Tools

AWS Lambda

DynamoDB

S3

SQS

EventBridge

Step Functions

Serverless Framework

Middy

Zod

Winston

AWS X-Ray

Luxon

Mocha

Sinon

ESLint

Prettier

Terraform

GitHub Actions

Job description

We’re hiring a hands-on Backend Developer to build and ship production serverless services for a fintech platform.

Tech stack

• Languages: TypeScript, Node.js (18–22)
• AWS: Lambda, DynamoDB, S3, SQS, EventBridge, Step Functions
• Databases: DynamoDB, PostgreSQL
• Frameworks / middleware: Serverless Framework, Middy
• Libraries: Zod (schemas/validation), Winston (logging), AWS X-Ray (tracing), Luxon (dates)
• Testing: Mocha, Sinon
• Tooling: ESLint, Prettier, Terraform, GitHub Actions

Your role at xpate:

• Build and evolve Lambda-first microservices that handle real money flows and integrations.
• Design REST APIs with type-safe schemas (Zod) and contracts that don’t rot.
• Model data in DynamoDB (access patterns first) and use PostgreSQL when relational fits better.
• Ship event-driven workflows with SQS/EventBridge/Step Functions: retries, idempotency, dead-letters, backpressure.
• Ensure observability: structured logging (Winston), distributed tracing (AWS X-Ray), actionable metrics.
• Write tests that protect releases (Mocha/Sinon), keep quality bars high, and reduce regressions.

We’re ready to meet you, if…

• You have strong hands-on backend engineering experience in TypeScript / Node.js.
• You have real AWS production experience — not “used Lambda once”, but built, operated, debugged, and fixed systems in production.
• You have the ability to ship fast without trashing quality: clean code, predictable delivery, and solid engineering fundamentals.
• You use AI tools daily to accelerate output (coding, debugging, analysis) and improve outcomes.
• You have English at B2+ level (the team is English-speaking).

What working at xpate looks like:

• A competitive salary (depending on what you bring).
• Everything you need to succeed, with flexibility built in — from flexible hours and hybrid/remote work options to private health insurance and paid time off.
• Top-of-the-line Apple gear to fuel your work.
• A workspace designed for focus and collaboration.
• Ownership of your work end-to-end, with the freedom to move fast and make a real impact.
• Celebrated wins, opportunities to grow and a culture where voices are heard and chances to grow are ever-present.

Why join xpate?

We're building the financial backbone of the future, where payments move freely and businesses thrive without barriers. If you want real impact, freedom to innovate, and work that drives change - xpate is the place for you.