Senior JS Full Stack Engineer

SoftServe; Polska; Hybrid; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Work from home

Office or hybrid

Health coverage

Learning opportunities

Job summary

SoftServe is seeking a senior full-stack engineer to design and build scalable cloud-native tools for retail teams. You will shape architecture and deliver features across React front-end, Node.js back-end, and serverless components, turning operational data into intuitive products that improve on-shelf availability.

You will work across REST and GraphQL services, AWS Lambda, API Gateway, and CI/CD pipelines, applying SOLID principles and testing strategies to deliver reliable software in a

Qualifications

• 4+ years of commercial software development experience.
• Strong proficiency with React, including Hooks.
• Solid understanding of Node.js and TypeScript.
• Experience building RESTful APIs and GraphQL services.
• Knowledge of SQL and NoSQL databases (PostgreSQL, MongoDB).
• Hands-on AWS Lambda and API Gateway experience.
• Testing expertise with unit/integration/end-to-end tests.
• Understanding of clean architecture and SOLID principles.
• Clear English communication for multinational teams.

Responsibilities

• Build end-to-end product features across React and Node.js with TypeScript.
• Improve system performance and scalability through architectural refinements.
• Implement REST APIs and integrate GraphQL services.
• Develop AWS Lambda functions and configure API Gateway with proper CORS.
• Apply testing practices across unit, integration, and end-to-end tests.
• Enforce clean architecture, DI, and SOLID design principles.
• Use observability tools to troubleshoot and maintain production stability.
• Contribute to CI/CD pipelines and code reviews.

Skills

React

Node.js

TypeScript

REST APIs

GraphQL

SQL/NoSQL

AWS

Testing

SOLID

English

Tools

React

Node.js

TypeScript

AWS Lambda

GraphQL

PostgreSQL

MongoDB

Terraform

API Gateway

Job description

In this role, you will design and build scalable full-stack applications, shaping architecture and delivering cloud-native tools that help retail teams detect stock issues, prioritize actions, and measure improvements in product availability. Your work turns operational and inventory data into intuitive products that help stores quickly identify discrepancies and improve on-shelf availability.

Responsibilities

• Build end-to-end product features across React, Node.js with TypeScript, and serverless components to deliver full-stack functionality
• Improve system performance, scalability, and maintainability by optimizing frontend and backend implementations and refining architectural design
• Implement REST APIs using Node.js and TypeScript and integrate with GraphQL services where required to support application functionality
• Develop AWS Lambda functions and configure Amazon API Gateway, ensuring proper CORS handling for secure and reliable service access
• Apply effective testing practices by implementing unit, integration, and end-to-end tests to maintain application reliability and quality
• Enhance application architecture by applying clean abstractions, SOLID principles, and reduced coupling across system components
• Use observability tools including logs, metrics, and tracing to troubleshoot issues and maintain production stability
• Contribute to CI/CD pipeline improvements, participate in code reviews, and promote engineering best practices across the team

Requirements

• 4+ years of commercial software development experience
• Strong proficiency with React, including practical use of Hooks such as useState, useEffect, useMemo, and useReducer while consistently applying the Rules of Hooks
• Solid understanding of React architectural patterns, including the ability to explain and compare Higher-Order Components and Hooks
• Strong proficiency with Node.js and TypeScript, including asynchronous programming with callbacks, Promises, async/await, and robust error handling within the Node.js async model
• Practical experience with building RESTful APIs and consuming GraphQL services in modern web applications
• Knowledge of SQL and NoSQL databases including PostgreSQL and MongoDB, with familiarity in indexing strategies and basic query optimization
• Hands-on experience with AWS Lambda, including configuration, handler signatures, API Gateway integrations, and CORS fundamentals
• Strong knowledge of software testing strategies, including applying the Test Pyramid with unit, integration, and end-to-end testing
• Hands-on experience with AI engineering and AI tools/harnesses
• Solid understanding of clean architecture principles, including dependency injection, abstraction, coupling and decoupling, and SOLID design principles
• Clear communication skills with Intermediate strong or Upper-Intermediate level of English for effective collaboration in a multicultural team
• Advanced experience with AWS ecosystem patterns such as API Gateway integrations, retries and DLQs, and event-driven architectures (would be a plus)
• Practical experience implementing GraphQL resolvers and schema stitching (nice-to-have)
• Familiarity with event-driven systems and messaging platforms such as Kafka or AWS EventBridge and Infrastructure as Code approaches such as Terraform or similar tooling (nice-to-have)

SoftServe is an equal opportunity employer. Qualified applicants will receive consideration regardless of race, color, ancestry, ethnicity, national origin, religion, sex, sexual orientation, gender identity or expression, age, citizenship, disability, health condition, marital or family status, veteran status, or any other characteristic protected by applicable law.

About us

We are a digital engineering and technology consulting company where expertise grows alongsidepeople. For more than 30years, we have been elevating technology: helping organizations navigate complex businesschallenges by combining deepengineering knowledge with thoughtful, research-backed innovation. Our teams work across keyareas: digitalengineering, data and analytics, Сloud, and AI/ML. In each, we deliver practical, scalablesolutions rooted in realbusiness needs and measurable human impact.

You bring your perspective and ambition. We create an environment where your work meetsclarity, confidence, andpurpose.

We offer

Work from home, from the office, or in a hybrid format that supports focus andcollaboration.

Competitive, market-based pay, benchmarked by role andlocation — plus health coverage, paid time off, wellness support, and learningopportunities.

Approachable leaders who communicate openly, keep teams close to the strategy, andsupport long-term planning.

Advanced tech communities

Stay close to AI/ML, Cloud, Quantum Computing, IoT, andRobotics communities, with projects built on modern frameworks.

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