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Open nowPosted 4 days ago

Senior Node.js Backend Engineer

N-iX146 open roles

Where
Ukraine
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Your applicationOpen nowSenior Node.js Backend EngineerN-iX · Ukraine

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The clock on this job

Early applications get read.

12.8% of postings close within 7 days. Measured by our own scanner across the market. N-iX postings stay open a median of 26 days.

Share of postings closed within
  1. 2.2%1 day
  2. 4.5%3 days
  3. 12.8%7 days
  4. 20.6%14 days
  5. 35.6%30 days
  6. 58.4%60 days
This job: posted 4 days ago

N-iX median: 26 days open

The posting

We are looking for a Senior Backend Engineer to join the Core Banking Services team and help build and scale a high-performance Banking-as-a-Service (BaaS) platform. We build and scale the high-performance, serverless API layer that empowers both internal consumers and partner banks to manage customers and their accounts.

As a pure backend engineering team, we don't build UI components. Instead, we focus entirely on engineering robust, highly available, and secure distributed services. The team owns the end-to-end lifecycle of core banking entities, including:

- Identity & Compliance: Automated customer onboarding and complex KYC workflows.

- Ledger & Accounts: Scalable deposit account management systems.

- Reporting: High-throughput data processing for reporting obligations, observability, and account statement generation.

Responsibilities:

  • Build and maintain the BaaS API services, including REST API and event-driven systems with a serverless architecture that other teams and partners depend on, making sure they're reliable and accurate.
  • Help shape how we solve problems: contribute ideas on how things should be built, weigh in on important decisions, and make sure we're building things the right way for the long term.
  • Keep our CI/CD processes healthy: spot when things are slow or breaking, and take action to make the team's day-to-day smoother and faster.
  • Drive architectural decisions and solution design within your domain, including writing technical solution designs, participating in threat modeling workshops, and collaborating cross-team on upstream/downstream dependencies.
  • Take ownership of production reliability by participating in an On-Call rotation, leading incident investigations, identifying root causes, and driving hotfixes, as the team does with live incidents on the platform.
  • Work with external partners and services we connect to, and take ownership when something on their side needs following up or resolving.
  • Keep our build, testing, and release processes healthy: spot when things are slow or breaking, and take action to make the team's day-to-day smoother and faster.

Must have:

  • Minimum 5 years of hands-on experience as a backend engineer, with at least 2 years of NodeJs/TypeScript experience.
  • Highly responsible for working with critical high-core value systems for the company.
  • Solid experience with AWS Serverless services - Lambda, SQS, API Gateway, EventBridge, DynamoDB, S3.
  • Solid understanding and practical application of design patterns
  • Hands-on experience with Infrastructure as Code (preferably Terraform & CDK).
  • Hands-on experience with TypeScript testing practices (unit, integration, system testing).
  • Experience with event-driven architectures (e.g., Kafka)
  • Familiarity with RESTful API design and OpenAPI specifications.

Soft skills:

  • Excellent communication skills. Ability to articulate challenges and solutions clearly.
  • Proven team player. Collaborates well with others and supports shared goals.
  • Critical thinking and problem-solving capabilities; able to design robust solutions and analyze production issues.
  • Proactiveness in supporting teammates and driving technical improvements.
  • Fluency in English.

Good to have:

  • Experience working in a monorepo setup (pnpm workspaces or similar).
  • Experience with Relational Databases (MySQL) and an ORM such as Prisma.
  • Experience with NoSQL databases (e.g., DynamoDB or similar)
  • German-language skills are a plus but not mandatory.

We offer*:

  • Flexible working format - remote, office-based or flexible
  • A competitive salary and good compensation package
  • Personalized career growth
  • Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
  • Active tech communities with regular knowledge sharing
  • Education reimbursement
  • Memorable anniversary presents
  • Corporate events and team buildings
  • Other location-specific benefits

*not applicable for freelancers

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