Job VC
Backend Engineer (Node.js / NestJS)
Technologies
Description
About the company
At
SpheraX LLC
, we revolutionize financial reporting and business analytics through a process-driven accounting system. Our platform enables the simultaneous application of key accounting standards (IFRS, GAAP, Management Accounting), supports multi-currency operations, and mirrors real business processes with the level of detail companies need. Leveraging AI for predictive modeling and performance analysis, we empower businesses to operate smarter, faster, and more effectively.
Our Tech Stack
Backend: Node.js, NestJS, PostgreSQL, gRPC, REST, TypeORM/Prisma
Frontend: React 19, TypeScript, Vite, MUI
Cloud & DevOps: AWS (Cognito, S3, EventBridge, Lambda, SQS, SNS), Terraform, Kubernetes, Helm, Karpenter, Docker, GitHub
Security & Identity: Keycloak, AWS Cognito, OAuth2, JWT
Quality & Tooling: Vitest, Playwright, K6, SonarQube, Puppeteer
What You’ll Do:
● Design and implement scalable microservices using Node.js and NestJS
● Build and maintain secure, versioned REST and gRPC APIs
● Develop multi-tenant data models and optimize PostgreSQL performance
● Implement authentication, authorization, and RBAC flows
● Integrate external services and internal platform modules
● Write clean, maintainable, and well-tested code (unit & integration tests)
● Contribute to CI/CD pipelines and infrastructure-as-code practices
● Collaborate closely with Frontend, DevOps, and Product teams
● Participate in architecture discussions and technical decision-making
Requirements:
● 3+ years of commercial experience with Node.js and TypeScript
● Strong hands-on experience with NestJS
● Solid experience with PostgreSQL and ORM frameworks (TypeORM, Prisma, or similar)
● Good understanding of RESTful API and gRPC design
● Experience working with Docker and containerized environments
● Familiarity with AWS services (Cognito, S3, EventBridge, Lambda)
● Experience with Terraform or other IaC tools
● Understanding of authentication flows (OAuth2, JWT, OpenID Connect)
● Experience with testing frameworks (Vitest, Postman, K6 or equivalents)
● Experience working in monorepo environments
● Strong debugging and problem-solving skills
● Upper-Intermediate English or higher
Nice to Have:
● Experience with financial, ERP, or accounting systems
● Exposure to AI/ML or analytics-driven applications
● Experience working with BPMN, Camunda, or workflow engines
● Understanding of clean architecture, DDD, or event-driven systems
Why Join SpheraX:
● Greenfield fintech SaaS platform — no legacy constraints
● Strong architectural focus and modern cloud-native stack
● Direct impact on product and engineering decisions
● Opportunity to work on AI-augmented financial intelligence
● Highly technical team and engineering-driven culture
Hiring process:
1. HR Prescreen call (~30 min)
2. Test task
3. Tech interview (~60 min)
4. Final interview (~60 min)
At
SpheraX LLC
, we revolutionize financial reporting and business analytics through a process-driven accounting system. Our platform enables the simultaneous application of key accounting standards (IFRS, GAAP, Management Accounting), supports multi-currency operations, and mirrors real business processes with the level of detail companies need. Leveraging AI for predictive modeling and performance analysis, we empower businesses to operate smarter, faster, and more effectively.
Our Tech Stack
Backend: Node.js, NestJS, PostgreSQL, gRPC, REST, TypeORM/Prisma
Frontend: React 19, TypeScript, Vite, MUI
Cloud & DevOps: AWS (Cognito, S3, EventBridge, Lambda, SQS, SNS), Terraform, Kubernetes, Helm, Karpenter, Docker, GitHub
Security & Identity: Keycloak, AWS Cognito, OAuth2, JWT
Quality & Tooling: Vitest, Playwright, K6, SonarQube, Puppeteer
What You’ll Do:
● Design and implement scalable microservices using Node.js and NestJS
● Build and maintain secure, versioned REST and gRPC APIs
● Develop multi-tenant data models and optimize PostgreSQL performance
● Implement authentication, authorization, and RBAC flows
● Integrate external services and internal platform modules
● Write clean, maintainable, and well-tested code (unit & integration tests)
● Contribute to CI/CD pipelines and infrastructure-as-code practices
● Collaborate closely with Frontend, DevOps, and Product teams
● Participate in architecture discussions and technical decision-making
Requirements:
● 3+ years of commercial experience with Node.js and TypeScript
● Strong hands-on experience with NestJS
● Solid experience with PostgreSQL and ORM frameworks (TypeORM, Prisma, or similar)
● Good understanding of RESTful API and gRPC design
● Experience working with Docker and containerized environments
● Familiarity with AWS services (Cognito, S3, EventBridge, Lambda)
● Experience with Terraform or other IaC tools
● Understanding of authentication flows (OAuth2, JWT, OpenID Connect)
● Experience with testing frameworks (Vitest, Postman, K6 or equivalents)
● Experience working in monorepo environments
● Strong debugging and problem-solving skills
● Upper-Intermediate English or higher
Nice to Have:
● Experience with financial, ERP, or accounting systems
● Exposure to AI/ML or analytics-driven applications
● Experience working with BPMN, Camunda, or workflow engines
● Understanding of clean architecture, DDD, or event-driven systems
Why Join SpheraX:
● Greenfield fintech SaaS platform — no legacy constraints
● Strong architectural focus and modern cloud-native stack
● Direct impact on product and engineering decisions
● Opportunity to work on AI-augmented financial intelligence
● Highly technical team and engineering-driven culture
Hiring process:
1. HR Prescreen call (~30 min)
2. Test task
3. Tech interview (~60 min)
4. Final interview (~60 min)