Senior JavaScript Developer (Backend)

If you are a strong JS Engineer who understands databases, system design, and performance — and you want to build something technically serious, not cosmetic — we would like to talk.

B2B Contract | Remote | Deel

About the Project

At ALLEVIATE.COM we are developing a next-generation marketing and data platform for a fintech company specializing in debt resolution.

The platform includes:

• Integrations with financial institutions and external data providers

• Lead validation and enrichment pipelines

• High-volume data processing and scoring

• Sales funnel optimization and automation

• AI-driven code generation and orchestration of AI agents

• Advanced analytics and performance optimization

This is not a landing-page project. This is a data-intensive, integration-heavy, performance-critical system.

We are looking for an engineer who understands architecture, scalability, and production responsibility — not just feature delivery.

What You Will Work On

• Design and implement scalable backend services in Node.js / TypeScript

• Architect and maintain systems handling high concurrency, heavy data processing, or large volumes of API integrations

• Design clean service boundaries and system architecture

• Build and optimize REST and GraphQL APIs

• Design and optimize PostgreSQL schemas, queries, and indexing strategies

• Implement data pipelines for validation, enrichment, scoring, and automation

• Integrate multiple third-party APIs (credit bureaus, enrichment providers, marketing tools)

• Optimize performance, reliability, and observability

• Work with modern AI tooling (AI-assisted coding, agent orchestration, workflow automation)

• Collaborate on CI/CD, containerization, and cloud deployment (Azure environment)

Required Technical Expertise

Core Requirements

• Strong, production-level knowledge of JavaScript / TypeScript

• Deep experience with Node.js

• Experience designing application architecture from scratch

• Experience designing and operating systems handling high concurrency, heavy data processing, or large volumes of API integrations

• Strong knowledge of PostgreSQL (schema design, performance tuning, indexing, query optimization)

• Experience building scalable REST APIs

• Understanding of distributed systems concepts (caching, queues, idempotency, concurrency control)

Additional Plus

• Experience with the Debt Settlement Industry

• Experience with Next.js / React

• Experience with Azure (App Services, Databricks, Fabric, etc.)

• Experience with Snowflake or similar data platforms

• Docker / Kubernetes

• AI-driven workflows, LLM integrations, or agent orchestration systems

What We Expect

• Architectural thinking — ability to see system-level consequences

• Ownership mindset — you build it, you care about how it runs

• Ability to work with ambiguity and evolving requirements

• Pragmatic approach to AI tools (we use AI to accelerate development, not to replace engineering judgment)

• Clear communication in English

Work Format & Compliance

• Remote position

• You must have:

  • Legal authorization to work remotely from your country of residence

  • Valid residence status

  • Ability to receive B2B compensation legally

• Engagement is structured as an independent contractor agreement via Deel

• All payments and contracts are managed through the Deel platform