Software Engineer II, Core Platform

Flex

Backend Engineer for Flex, a fintech company, focusing on core platform services. Join a remote-first team aiming to improve rent payment flexibility for users.

Posted 5/12/2026full-timeRemote • New York • 🇺🇸 United StatesJuniorMid-Level💰 $119,000 - $175,000 per yearWebsite

Tech Stack

Tools & technologies

AWSCloudDistributed SystemsDynamoDBJavaMySQLNoSQLPostgresPythonTerraform

About the role

Key responsibilities & impact

Design, implement and maintain our core service, such as Identity, Auth, Payment, Financial, Risk etc.
Scale out core platform to support business growth while maintaining performance and reliability
Continuously improving our daily operations with automation, tooling, design evolution, observability etc.

Requirements

What you’ll need

2+ years of experience in software development or a related field
Strong experience with Java and Python
Experience with relational and NoSQL databases, such as MySQL, PostgreSQL, and DynamoDB
Proactive working style with strong ownership
Experience in the payments domain; familiarity with the payment industry
Experience designing and developing fault-tolerant, scalable distributed systems
Experience with AWS cloud services, including ECS/EKS, Lambda, API Gateway, VPN, S3, and RDS
Experience with infrastructure as code (e.g., AWS CLI, AWS CDK, Terraform)
Strong communication skills, with the ability to explain technical concepts to non-technical audiences
Adherence to engineering best practices, with the ability to propose and drive new improvements

Benefits

Comp & perks

Competitive medical, dental, and vision
Company equity
401(k) plan with company match
Unlimited paid time off + 13 company paid holidays
Parental leave
Flex Cares Program: Non-profit company match + pet adoption coverage
Free Flex subscription

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

JavaPythonMySQLPostgreSQLDynamoDBAWS ECSAWS EKSAWS LambdaAWS API GatewayTerraform

Soft Skills

proactive working stylestrong ownershipstrong communication skills