Professional Full Stack

JavaScript

., Poland

Transition Technologies MS

Full-time

B2B, Permanent

Mid

Remote

Tech stack

English

B2

Polish

B2

ReactJS

regular

TypeScript

regular

Python

regular

Amazon AWS

regular

Job description

Your responsibilities:

• Back-End Development:Develop serverless back-end logic using AWS Lambda functions in Python.Design and implement RESTful APIs with AWS API Gateway to support front-end and third-party integrations.Proficient in both SQL and NoSQL databases, including management, optimization and diagnostics.(e.g. AWS Aurora, PostgreSQL, MySQL, DynamoDB, MongoDB)

• Front-End Development:Build and maintain the UI using ReactJS, ensuring responsiveness, cross-browser compatibility, and a seamless user experience.Integrate front-end components with back-end APIs and AWS services.Optimize the UI for performance, accessibility, and maintainability.

• AWS Service Management:Configure and deploy UI using AWS CloudFront for secure and efficient content delivery.Work with AWS S3 for static asset management and storage solutions.Collaborate on the integration of beneficial AWS services like SNS, SES,, SageMaker, and AWS Bedrock for AI-driven capabilities.

• Testing and Debugging:Write and maintain unit tests for front-end and back-end components.Debug and resolve production issues to ensure system reliability.

• Operations:Proven ability to troubleshoot data issues, including missing or inconsistent records, query failures, and performance degradation.Ability to investigate data discrepancies across systems (e.g., source vs target, API vs DB) using joins, comparisons, and reconciliation techniques.Experience with monitoring and alerting on data health (e.g., volume checks, freshness, pipeline success rates).Comfortable using scripting or automation tools (e.g., Python, Bash) to support diagnostics and repetitive troubleshooting tasks.Full ownership of identifying, investigating, and resolving data-related issues, including root cause analysis, query optimization, and data integrity checks, with minimal dependency on internal teams and occasional coordination with third-party providers if required.

• Collaboration:Work closely with DevOps, product owners, and other stakeholders to deliver high-quality features.Participate in code reviews, sprint planning, and system design discussions.

We are looking for you, if you have:

• Required Skills and Experience:Programming LanguagesReactJS and TypeScript Python Serverless back-end development (e.g., AWS Lambda).OperationsRoot Cause Analysis (RCA)Data Comparison / ReconciliationDatabase Administration – Proficient in both SQL and NoSQL databases, including optimization and diagnostics.(e.g. AWS Aurora, PostgreSQL, MySQL, DynamoDB, MongoDB)AWS Services Expertise:AWS RDSAWS CloudFrontAWS S3 AWS GluePySparkAWS Athena Elastic Search (OpenSearch is a plus)AWS Lambda AWS API GatewayJupiterNotesDevelopment Tools:Experience with Git, CDK, CI/CD pipelines, and debugging tools.Familiarity with front-end build tools like Webpack or Vite.

• Beneficial Skills:Knowledge of AWS SNS for notifications and messaging.Experience with AI services like AWS SageMaker and AWS Bedrock, including familiarity with models like Anthropic Claude 3.5 (Sonnet).Understanding of secure coding practices and performance optimization techniques.AWS DynamoDB SnowFlake

• Soft Skills:Strong problem-solving and analytical skills.Effective communication and collaboration in cross-functional teams.Adaptability to work in a fast-paced, evolving environment.

• Certifications (Optional but Preferred):AWS Certified Developer AWS DevOpsAWS Certified Solutions Architect

We offer:

• Participation in interesting and challenging projects

• Flexible working hours

• A great, non-corporate atmosphere

• Stable employment conditions (contract of employment or B2B contract)

• Opportunities for development and promotion

• Attractive package of benefits

• Remote work

We reserve the right to contact the selected candidates.

Published: 17.08.2025

Meet the company

Transition Technologies MS

We are a rapidly growing IT company with global reach. We deal with IT outsourcing and implementation projects in flexible cooperation models, providing access to competence and experts in technologies from mainstream to cloud. TTMS' greatest strength is its skilled professionals, so people are at the heart of our organisational culture.

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