May 18, 2026

Senior Backend Engineer

Senior • Remote

Gliwice, Poland

Senior Backend Engineer (AWS Serverless)

About the Role

We’re looking for experienced Senior Backend Engineers to join a cloud modernisation project in the healthcare sector. The team is responsible for rebuilding and expanding a secure AWS-based platform, migrating selected Azure services, and delivering scalable integrations with Salesforce and other external systems.

This is a hands-on engineering role focused on backend services, serverless infrastructure, and event-driven architectures. You’ll work closely with cloud engineers, platform teams, and stakeholders to deliver production-ready solutions under tight delivery timelines.

The project includes both modernisation of existing systems and development of new integrations — this is not a greenfield environment.

Contract Type: B2B
Work Mode: 100% Remote
Time Zone: CET/CEST (Poland) — occasional meetings after 18:00

Project Overview

The client is operating in the medical industry and is currently modernising their cloud ecosystem to support secure and compliant data processing workflows.

The engineering team will focus on:

  • Building AWS serverless services and APIs

  • Designing event-driven integrations with Salesforce

  • Migrating Azure-based components to AWS

  • Rebuilding repositories and CI/CD processes in GitLab

  • Delivering secure architectures aligned with SOC 2 and HIPAA standards

Technology Stack

Backend & Cloud

  • Python

  • TypeScript

  • AWS Lambda

  • API Gateway

  • Step Functions

  • EventBridge

  • SQS / SNS

Data & Infrastructure

  • RDS

  • DynamoDB

  • S3

  • AWS Secrets Manager

  • Terraform

  • GitLab CI/CD

Integrations & Compliance

  • Salesforce REST API

  • Salesforce Platform Events

  • SOC 2

  • HIPAA

  • Confluence

  • Jira


Responsibilities

Backend Engineering & Integrations

  • Build and maintain scalable serverless services on AWS

  • Design and implement Salesforce-to-EventBridge integration patterns

  • Develop secure architectures for client file transfer and data synchronisation

  • Create reusable integration standards for event-driven and bulk-processing workflows

  • Design and maintain RESTful APIs and asynchronous processing pipelines

Migration & Platform Modernisation

  • Rebuild selected Azure Functions and Azure Pipelines within AWS environments

  • Support repository migration and CI/CD transition to GitLab

  • Contribute to infrastructure and deployment automation using Terraform

Engineering Quality & Delivery

  • Participate in code reviews and maintain production-grade engineering standards

  • Create and maintain technical documentation in Confluence

  • Work within agile delivery processes including daily standups, sprint reviews, and retrospectives

  • Collaborate closely with cloud engineers and platform stakeholders


What We’re Looking For

Required Skills & Experience

  • 4+ years of backend engineering experience

  • 2+ years working with AWS serverless technologies in production

  • Strong commercial experience with Python and/or TypeScript

  • Hands-on experience with:

    • AWS Lambda

    • API Gateway

    • EventBridge

    • SQS / SNS

    • Step Functions

  • Experience with RDS, DynamoDB, S3, and Secrets Manager

  • Terraform experience focused on application-level infrastructure

  • Experience integrating Salesforce APIs (REST and/or Platform Events)

  • Strong understanding of REST APIs and event-driven architectures

  • GitLab experience including CI/CD integration workflows

  • Familiarity with SOC 2 and/or HIPAA compliance requirements

  • Experience creating production-level technical documentation

Nice to Have

  • Azure Functions or Azure Pipelines migration experience

  • Healthcare or medical-sector project background

  • Experience with ETL / ELT or bulk data processing pipelines

  • API test automation experience

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🏢 Summary: Backend Engineer role focused on building and scaling identity, authentication, and registration services using serverless AWS technologies. The position involves designing high‑traffic RESTful APIs, working with DynamoDB, and owning infrastructure as code within a TypeScript monorepo. You will collaborate in an Agile team to deliver secure, highly available multi‑region systems with strong automated testing practices. 🗂️ Requirements: Bachelor's Degree in Computer Science, Software Engineering, or equivalent, 3+ years professional experience as Backend Engineer, Strong proficiency in TypeScript and Node.js, Experience designing and building RESTful APIs for high-traffic systems, Hands-on experience with serverless architectures (AWS Lambda, API Gateway or equivalent), Experience with NoSQL databases, particularly DynamoDB, Ability to write unit, integration, and end-to-end tests, Experience with Git and monorepo workflows, Understanding of systems architecture, SOLID principles, distributed systems patterns, Experience working in Scrum/Agile frameworks 📃 Skills: TypeScript, Node.js, AWS, Lambda, MuleSoft, DynamoDB, REST, Jest, Cucumber, Pactum, Terraform, CI/CD, Git, NoSQL, API, SAST 🏢 Description: Emagine is seeking a skilled and passionate Backend Engineer to join an international team focused on building and scaling identity, authentication, and registration services that support millions of consumers across multiple markets, channels, and brands. This is a key role where you will contribute to the design and development of modern, cloud-native backend solutions, ensuring scalability, reliability, and high performance. You will play a critical role in designing and deploying serverless APIs, building integrations with third-party identity providers, and contributing to reusable backend components used across the platform. This position requires strong expertise in TypeScript and Node.js, experience with AWS serverless technologies, and a passion for clean code, automation, and scalable software architecture. Your Main Responsibilities: Design, develop, and deploy serverless APIs using AWS Lambda and MuleSoft gateways for authentication, consumer profiles, OTP, and event processing Develop clean, well-tested TypeScript code within a monorepo, contributing to shared libraries and product-specific services Design efficient data access patterns using DynamoDB for low-latency, high-throughput applications Build and maintain integrations with third-party identity and messaging providers Develop automated unit, integration, and contract tests using Jest, Cucumber, and Pactum Manage infrastructure as code using Terraform and deploy through CI/CD pipelines Participate in the Backend Community of Practice, sharing knowledge and contributing to backend engineering best practices Collaborate within a cross-functional Agile team to deliver high-quality software Continuously improve system architecture by addressing technical debt and implementing incremental refactoring Develop reusable internal libraries consumed by multiple teams across the platform You Bring: Bachelor's degree or higher in Computer Science, Software Engineering, or a related field 3+ years of professional experience as a Backend Engineer Strong proficiency in TypeScript and Node.js Experience designing and developing RESTful APIs for high-traffic applications Hands-on experience with serverless architectures (AWS Lambda, API Gateway, or similar) Solid experience with NoSQL databases, particularly DynamoDB Strong automated testing practices, including unit, integration, and end-to-end testing Experience using Git within monorepo workflows Good understanding of systems architecture, SOLID principles, and distributed systems Experience working in Scrum/Agile environments Strong analytical, problem-solving, and collaboration skills Nice to Have: Experience with Terraform or other Infrastructure as Code tools Familiarity with CI/CD pipelines, deployment automation, quality gates, and SAST scanning Experience with multi-region or multi-tenant architectures Knowledge of identity and authentication protocols Experience integrating third-party APIs Familiarity with event-driven architectures Experience with monitoring and observability tools Knowledge of feature toggles for progressive deployments Familiarity with schema validation approaches Experience with MuleSoft or similar API management platforms Location & Eligibility: Candidates must be based in Portugal H Full Remote About emagine: At emagine, we value diversity, inclusion, and equal opportunities. We believe that different perspectives drive innovation and create stronger teams, and we are committed to fostering an inclusive environment where everyone can thrive. We work with leading international clients on innovative and high-impact projects, offering opportunities to grow both professionally and personally. If you are interested in this opportunity, we encourage you to apply and be part of a dynamic and forward-thinking environment. To learn more about us, visit our website: www.emagine-consulting.com

Technology

Upvanta sp. z o.o.

Fullstack Developer (Typescript/AWS)

Senior

Remote

Warsaw, MZ, Poland

900 - 1,130 PLN

🏢 Summary: 100% remote B2B role for a Fullstack Developer focused on building scalable APIs and data pipelines using TypeScript and AWS serverless services. The position involves event-driven architectures, infrastructure as code, and CI/CD automation, with partial support of existing Java or Python services. Work is conducted in a SAFe Agile environment. 🗂️ Requirements: Proven experience as Fullstack Developer, Strong proficiency in TypeScript and Node.js, Hands-on experience with AWS Lambda, S3, Step Functions, EventBridge, API Gateway, DynamoDB, CDK, Experience with CI/CD tools, Strong SQL and relational database experience, Experience with NoSQL databases, Ability to develop and maintain Java services, Understanding of serverless and event-driven architectures, Experience with authentication and authorization frameworks, Experience working in SAFe Agile environment 📃 Skills: TypeScript, Node.js, AWS, Lambda, S3, StepFunctions, EventBridge, APIGateway, DynamoDB, CDK, PostgreSQL, SQL, MongoDB, Java, Python, GitHubActions, Bamboo, OpenAPI, Swagger, Auth0 🏢 Description: Fullstack Developer (Typescript/AWS) Salary rate: 900 - 1130 PLN netto/MD B2B 100% Remote We are seeking a highly skilled Full Stack Developer with strong experience in TypeScript and modern AWS services. This role involves building scalable APIs and data pipelines using serverless and event‑driven architectures. The ideal candidate will have hands‑on experience with EventBridge, API Gateway, Lambda, Step Functions, and S3. Experience working in a SAFe Agile environment is highly desirable. Approximately 20% of the role involves Java or Python development to support existing services. Key Responsibilities: Design, develop, and maintain APIs using TypeScript (Node.js) and serverless patterns. Build and manage data ingestion pipelines using AWS Lambda, S3, SQL databases (PostgreSQL), and Step Functions. Collaborate with DevOps to manage deployments using AWS CDK and CI/CD tools (GitHub Actions/Bamboo). Implement infrastructure as code using AWS CDK and manage deployments via CI/CD tools (GitHub Actions/Bamboo). Use AWS SDKs to integrate with AWS services in application code. Develop and maintain Java services where required , Python is a plus. Work with NoSQL databases (DynamoDB/MongoDB) and SQL databases. Ensure robust error handling and validation in data pipelines via Lambda and Step Functions. Document APIs via OpenAPI/Swagger for seamless front‑end/back‑end integration. Implement secure authentication and authorization using Auth0 (or similar). Participate in SAFe Agile ceremonies (PI Planning, Sprint Planning, Daily Stand‑ups, Retrospectives). Collaborate cross‑functionally with Product Owners, Scrum Masters, and other team members. Primary Skills Proven experience as a Full Stack Developer or similar role. Strong proficiency in TypeScript (Node.js). Hands‑on experience with AWS services: Lambda, S3, Step Functions, EventBridge, DynamoDB, API Gateway, and CDK. Experience with CI/CD tools like GitHub Actions or Bamboo. Strong SQL skills and experience with relational databases. Experience with NoSQL databases. Ability to develop and maintain Java services; Python is a plus. Understanding of data validation, error handling, and pipeline orchestration. Familiarity with authentication/authorization frameworks (Auth0/Azure AD/Ping). Strong problem‑solving skills and attention to detail. Excellent communication and collaboration skills. Experience working in a SAFe Agile environment and understanding Lean‑Agile principles.