Senior Integration Engineer (Remote, Anywhere in Pakistan, EUR Salary)

Requirements:

• 6+ years of experience building and operating backend or integration services in production. • Proven end-to-end ownership, from designing and building to shipping and operating systems. • Strong hands-on experience with AWS serverless and messaging services, including SQS/SNS, Lambda, S3, EventBridge, Step Functions, API Gateway, CloudWatch, and Secrets Manager. • Strong backend engineering experience with Node.js, TypeScript, Python, or a similar modern language. • Go experience is a plus, but not required, the candidate should be able to learn it quickly and contribute to our tooling. • Strong knowledge of integration and messaging patterns, including idempotency, deduplication, ordering, dead-letter queues, replay, retry/backoff, and fault tolerance. • Strong experience with JSON, XML/XSD, and CSV, including parsing, validation, transformation, and mapping. • Solid API skills, including designing and consuming REST APIs, along with practical experience with partner integration requirements such as SOAP, SFTP, and batch files. • A track record of mentoring or leading engineers and raising the team's engineering standards. • Strong problem-solving and debugging skills, with the ability to trace failures across multiple systems and identify the root cause. • Experience with structured logging, monitoring, and building observable systems. • Genuine, hands-on use of AI tools in real engineering work, with a clear understanding of where they add value and where they do not. • Production Go experience is a plus. • Experience with PHP, as several existing integrations use it and will need to be maintained and gradually migrated. • Experience with a transformation language such as XSLT or DataWeave. • Experience with Infrastructure as Code, including Terraform, CDK, or CloudFormation, and CI/CD pipelines. • Experience with streaming and storage technologies beyond the basics, including Kinesis, DynamoDB, and OpenSearch. • Experience working with government, regulated, or GDPR-sensitive data domains. • Experience in AgriTech, IoT, supply-chain systems, or enterprise integration platforms such as MuleSoft, Boomi, or Camel is a plus. Responsibilities: • Design, build, test, deploy, and operate event-driven services using AWS services such as SQS/SNS, Lambda, EventBridge, Step Functions, S3, and API Gateway. • Extend the canonical data model with Mykola to standardise data from multiple sources into one consistent internal representation. • Build connectors that ingest from and deliver to external partner systems, transforming data between source, canonical, and destination formats with schema and business-rule validation. • Design reliable integrations with idempotency, deduplication, ordering, dead-letter queues, replay, retry/backoff, and fault tolerance, ensuring delivery remains reliable when external systems are unavailable. • Ship VetLink and subsequent integrations end to end, including design, development, testing, deployment, monitoring, documentation, and operational runbooks. • Maintain and modernise existing integrations, including government/compliance APIs, IoT feeds, supply-chain partners, and third-party software, with some legacy integrations written in PHP. • Review pull requests, set engineering standards, unblock the two mid-level engineers, and contribute to their growth within the team. • Build and maintain systems with strong structured logging, monitoring, observability, and debugging capabilities. • Investigate production issues across multiple systems and trace failed messages to their root cause. • Use AI tools hands-on in real engineering work, applying sound judgment about where they help and where they get in the way.