Senior Back End Engineer (Node.js)

Adaptiq Ltd.; Warszawa; Híbrido; PLN 180 000 - 260 000; Tempo integral

Vantagens oferecidas por esta oferta de emprego

Vacation and holidays

Legal and accounting support

Powerful workstation

Resumo da oferta

Adaptiq Ltd. is seeking a Senior Backend Engineer to join a product engineering team working on large-scale systems. The role focuses on back-end work with occasional front-end contributions, owning end-to-end technical solutions from design to deployment.

You will collaborate with cross-functional teams, influence architecture decisions, and apply strong judgment to deliver robust, scalable services in a distributed environment. A product-minded approach and independent work ethic are essential.

Qualificações

• 5+ years of backend development experience
• Strong TypeScript/Node.js skills in production
• Experience with distributed systems and scalable architectures
• Proficient in PostgreSQL performance and query optimization
• Familiarity with React for frontend touches when required
• Experience with CI/CD, Docker, Kubernetes and observability tooling
• Product‑oriented mindset and ability to translate requirements into technical solutions
• Experience with AI-assisted development tools is a plus

Responsabilidades

• Design, develop, and maintain scalable backend services using TypeScript and Node.js
• Own system design decisions for new capabilities and ensure integration with existing infrastructure
• Collaborate with product/engineering teams to translate requirements into technical solutions
• Optimize PostgreSQL queries, indexes, and performance
• Contribute to React frontend functionality when required by the project
• Coordinate with DevOps on deployments, observability, and production readiness
• Handle feature development, bug fixes, security improvements, and patches
• Evaluate architectural trade-offs in line with business needs
• Participate in on-call rotations to support production issues

Conhecimentos

TypeScript

Node.js

Distributed systems

PostgreSQL

React familiarity

CI/CD

Observability

Product-oriented thinking

Independent work

Ferramentas

Docker

Kubernetes

CI/CD tooling

Descrição da oferta de emprego

Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies across a wide range of industries.

About the Product:

Our client is an established international technology company developing a sophisticated B2B software platform serving enterprise customers worldwide.

The platform operates in a complex, data-intensive environment, handling large volumes of information through distributed systems where performance, scalability, and reliability are critical.

As the product evolves, engineering teams focus on developing new capabilities, optimizing existing services, and improving the underlying architecture. This involves addressing challenges related to distributed systems, data processing, database performance, and system integration.

The engineering environment combines mature production systems with ongoing innovation, offering opportunities to contribute to both customer-facing functionality and shared technical capabilities across multiple teams.

About the Role:

We are looking for an experienced Senior Back End Engineer to join a product engineering team working on complex, large-scale software systems. This is a predominantly backend-focused role, with occasional frontend development when required by the project.

You will take end-to-end ownership of technical solutions, from requirements analysis and system design to implementation and deployment. The role involves developing both product-facing functionality and shared backend services, while ensuring seamless integration with an established distributed architecture.

We are looking for an independent, proactive engineer with strong technical judgment and a product-oriented mindset. You will collaborate with cross-functional teams, influence architectural decisions, and solve challenging engineering problems with a high degree of autonomy.

Key Responsibilities:

• Design, develop, and maintain scalable production backend services using TypeScript and Node.js.
• Take ownership of system-design decisions for new capabilities and ensure seamless integration with existing infrastructure.
• Collaborate with product and engineering teams to understand requirements and translate them into effective technical solutions.
• Design and optimize PostgreSQL queries, indexes, and database performance.
• Contribute to React-based frontend functionality when required by the project.
• Work closely with DevOps engineers on deployments, observability, infrastructure capacity, and production readiness.
• Handle a variety of engineering activities, including feature development, bug fixes, security improvements, and production patches.
• Evaluate architectural alternatives and communicate technical trade-offs in the context of product and business requirements.
• Incorporate modern AI development tools into daily engineering activities, including planning, coding, and testing.
• Participate in the team’s on-call rotation and support the resolution of critical production issues.

Required Competence and Skills:

• 5+ years of professional backend development experience building production systems at scale, with a strong understanding of distributed systems.
• Strong hands-on expertise in TypeScript and Node.js, including developing and maintaining complex backend services.
• Solid system-design skills, with the ability to evaluate architectural options and explain technical decisions and trade-offs.
• Strong PostgreSQL expertise, including complex SQL queries, query optimization, indexing, and performance tuning.
• Familiarity with React and willingness to contribute to frontend development when necessary;
• Familiarity with CI/CD, Docker or Kubernetes, and observability, with an understanding of the deployment lifecycle.
• Ability to work independently, collaborate across engineering teams;
• Strong product-oriented thinking and the ability to connect technical decisions with business and user needs.
• Practical experience using modern AI-assisted development tools.

Nice to Have:

• Experience with Microsoft Azure or another major cloud platform.
• Experience with Redis, Elasticsearch, or ClickHouse.
• Deeper hands-on DevOps experience, including infrastructure and deployment workflows.

Why Us:

20 days of vacation leave per calendar year, plus official national holidays in your country of residence.

Full accounting and legal support in all countries where we operate.

Powerful workstation and access to coworking space when needed.