Senior Backend Software Engineer; Node.js

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We are looking for a Senior Backend Software Engineer (Node.js) to join a long-term project for our Canadian partner, an international software company with a portfolio of Windows products distributed under multiple brands.

The project involves a large, interconnected ecosystem of applications and services built and maintained over many years. It combines legacy systems with modern cloud-based solutions and includes backend services, administrative platforms, APIs, websites, integrations, and internal tools supporting product distribution, marketing, and operations.

You’ll work on maintaining production stability, investigating complex technical issues, improving existing systems, and gradually modernizing the technical environment.

• Node.js
• Type Script
• MySQL
• MongoDB
• Amazon Aurora
• AWS
• AWS Lambda
• Serverless Framework
• API Gateway
• AWS SDK
• Amazon SQS
• Docker
• Terraform
• AngularJS v1

You’ll join a small, experienced Techstack team supporting a diverse backend ecosystem. You’ll work closely with a Senior Engineer who has deep knowledge of the systems, another Senior Engineer involved part-time, and a Project Manager on the client side.

The role offers plenty of independence and ownership, with an opportunity to work with complex systems, share knowledge, and make a real impact on their stability and improvement.

We are committed to implementing high standards in the technology industry, and it is the fundamental mission of our work. To achieve this goal, the company and all its members are constantly evolving.

Each of us has the opportunity to contribute to the product, the company, the team, the industry, and our personal development. At Techstack, you have the option to choose from various growth opportunities that align with your interests:

- meetups, where you can share your knowledge and develop simultaneously by sharing your experiences within the company and local technical communities;

- roles such as a mentor or a technical lead. In any of these roles, you will assist junior professionals and share your knowledge and experiences with them.

- participation in our technical Guilds, where you can discuss technical solutions, approaches, and industry trends.

All of these elements contribute to shaping the culture and expertise within both our team and the company as a whole.

Support and improve backend services, APIs, admin portals, websites, and automation tools.

Maintain and gradually modernize existing applications, working across both legacy and newer technologies.

Investigate production issues, troubleshoot problems, and find their root causes.

Work with AWS services, cloud infrastructure, and deployment pipelines.

Improve the stability, performance, and maintainability of existing systems.

Dive into unfamiliar systems, figure out how they work, and help keep technical documentation up to date.

Use AI tools in your daily work for coding, debugging, testing, refactoring, and documentation.

Review AI-generated code and make sure it meets the required standards for quality, security, and maintainability.

Work closely with the team and client-side stakeholders during onboarding and knowledge transfer.

Take ownership of your areas and help reduce technical debt.

5+ years of commercial software development experience.

Experience building and supporting REST APIs and distributed systems.

Strong SQL skills and experience with relational databases.

Confident hands-on experience with AWS and cloud infrastructure.

Experience troubleshooting production systems and working with legacy applications.

Good understanding of software architecture, design patterns, security, and system integrations.

Comfortable working independently with complex systems and…