BraintrustVerified listing

Full Stack Developer – SaaS Platform (UI/UX & Backend Security)

30–50/hr

Remote

contract

Posted October 21, 2026

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Listing checked October 24, 2026 · pay as published by Braintrust

Key details

Pay: $30–50/hr
Location: Remote
Job type: contract
Posted: October 21, 2026

Overview

Thredz runs a multimedia customer communication platform that service teams use to handle interactions and pull information from systems such as HubSpot and Salesforce. The core build already exists, and the next stage is getting that MVP ready for beta testers and the first paying customers. You will assess the whole application, from the PostgreSQL data layer and multi-tenant access controls through to the frontend, then close the gaps that stand in the way. Hosting stays on Scaleway and other European cloud services, so a move to AWS or GCP is off the table. The first engagement runs about a month, with further development phases likely as the product grows.

What You'll Do10

Audit the current application end to end: frontend code, backend services, architecture, and overall code quality.
Rank technical debt, security holes, and performance problems, then agree with the founder on what gets fixed first.
Rework the UI/UX so beta users and customer demos see a modern, polished, intuitive product.
Tighten backend architecture for a multi-tenant setup: tenant isolation, access controls, and safe handling of customer data.
Review integrations, background jobs, and messaging workflows for reliability and scale.
Work within the existing stack of PostgreSQL, Temporal, message queuing services, and Scaleway infrastructure.
Codify infrastructure as code and automated deployments, cutting out manual console work.
Lay the groundwork for later security and compliance work, including SOC 2 readiness.
Own your assigned tasks, report progress, and bring practical fixes to the founder rather than waiting on direction.
Advise on where the product will need deeper specialization later, whether frontend or backend.

Requirements10

3+ years of professional full stack development, ideally on SaaS products.
A record of improving the UI/UX of a web application that already shipped, backed by command of modern frontend practice.
Grasp of backend architecture: API design, authentication, authorization, and secure data handling.
Hands-on work with multi-tenant SaaS, including tenant isolation and data segregation.
Strong PostgreSQL skills and relational schema design.
Experience with asynchronous processing, message queues, and workflow orchestration such as Temporal.
Working knowledge of DevOps: CI/CD pipelines, infrastructure as code, and automated deployments.
Comfort reading an unfamiliar codebase, spotting weak points, and fixing them on your own.
Clear communication, with recommendations the founder can act on right away.
Comfort with the pace and ambiguity of an early-stage startup.

Preferred Qualifications6

Preparing a SaaS product for security audits or SOC 2 compliance.
European cloud hosting and data sovereignty considerations.
Integration work with HubSpot or Salesforce.
Product design or frontend engineering background with a strong visual eye.
Self-hosted CI/CD runners and code-driven infrastructure management.
Scaleway or another European cloud provider.

Who Should Apply

A mid-level full stack developer who has shipped a SaaS product and then gone back to improve it, at ease with both frontend polish and a multi-tenant security review. You read unfamiliar code well and can hand the founder a clear, ordered list of what to fix first.

Salary Insight

The role pays $30 to $50 per hour on a freelance basis across an initial month, with more phases possible. That band matches typical mid-level contract full stack work, and someone with multi-tenant security or SOC 2 experience should sit toward the top of it.

Pay and demand for Software Engineering roles

Market estimates from live NearSkill listings — separate from this job's published terms.

Aggregated

This role · as published

$30–50/hr

Taken from the listing itself.

Typical pay · estimated

$75/hour

Median of 267 similar roles that publish pay · 29 publish only a top rate; those count at the rate they gave

Most Software Engineering roles pay $55–$97 per hour. This role's pay sits below that range.

Typical rangeMedian payThis role

Rates shown per hour. Yearly and monthly pay converted; one-time fees and non-USD pay are not included.

Live similar roles: 361
Listed in last 30 days: 207
Remote: 91%

Hiring most right now: micro1 (115) · Turing (67) · Mercor (46)

Most requested skills · share of roles

python
38%
code review
22%
java
22%
debugging
20%

Figures from Software Engineering roles live on NearSkill when this page loaded. A role can close before you apply, so check the listing itself.

Compare your resume against these roles

Required skills

PostgreSQLTemporalMessage QueuesDevOpsCi/cdInfrastructure As CodeMulti Tenant ArchitectureUi/ux DesignAPI DevelopmentAuthenticationAuthorizationScalewayHubspotSalesforceSoc 2Crm IntegrationAsynchronous ProcessingData SecurityFrontend DevelopmentRelational Database DesignPostgres

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