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Kpler

Senior Fullstack Engineer – Chartering, Inbox

Kpler

Senior Fullstack Engineer developing and scaling email client solutions for global clients. Leading engineering initiatives and mentoring team members in diverse market environments.

Posted 6/23/2026full-timeBudapest • 🇭🇺 HungarySeniorWebsite

Tech Stack

Tools & technologies
AWSDistributed SystemsElasticSearchJavaScriptKafkaKubernetesMicroservicesMySQLPythonRedisRubyRuby on RailsTypeScriptVue.js

About the role

Key responsibilities & impact
  • Design and Build End-to-End Features: Develop scalable and high-performance frontend and backend systems, working across the stack with technologies like AWS, K8S, Ruby on Rails, Python and Vue.js.
  • Lead Strategic Alignment and Initiatives: Drive high-impact engineering initiatives and manage technical communication with engineering managers, product managers, designers, and customers independently to ensure solutions align with critical business and reliability requirements.
  • Champion Engineering Excellence: Write robust, maintainable code and implement best practices around testing, CI/CD, performance, observability and reliability.
  • Architect Scalable Systems: Design and implement distributed systems and microservices with event-driven architecture using Kafka.
  • Maintain and Scale Tech Stack: Lead the scaling efforts of our production Rails environment to keep pace with our growth, while architecting 'greenfield' components as we refactor toward our future-state tech stack.
  • Mentor and Coach: Serve as an engineering leader by mentoring junior and mid-level engineers on development best practices, engineering operational excellence, and complex system design.
  • Own Operations and Reliability: Take part in monitoring, incident response, production support and performance tuning across the stack.
  • Contribute to Agile Culture: Actively participate in sprint planning, retrospectives, and other Agile ceremonies to continuously improve team practices.

Requirements

What you’ll need
  • 6+ years developing production-grade applications with Ruby/Python, backend frameworks (preferably Ruby on Rails + Sidekiq and FastAPI) and frontend frameworks (preferably Vue.js) in TypeScript.
  • Strong expertise in designing, implementing, and maintaining microservices architectures.
  • Solid hands-on experience with Kafka and event-driven systems.
  • Proficiency in MySQL, Elasticsearch, and Redis.
  • Familiarity with AWS and infrastructure orchestration tools like Kubernetes and Helm.
  • Deep understanding of data structures, distributed systems, and system design principles.
  • Excellent communication and collaboration skills, technical leadership and mentoring, strong adherence to Agile methodologies, decisive and purpose-driven (we make things happen), supportive and collaborative nature (we always help each other).
  • Experience integrating SDKs and APIs into web
  • Exposure to DevOps tooling and practices (GitHub Actions, observability, SonarQube, etc.).
  • Prior work in fast-paced, product-focused environments or the maritime/logistics domain.

Benefits

Comp & perks
  • Health insurance
  • Retirement plans
  • Paid time off
  • Flexible work arrangements
  • Professional development
  • Bonuses
  • Equipment allowances
  • Wellness programs

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools
RubyPythonRuby on RailsVue.jsTypeScriptKafkaMySQLElasticsearchRedismicroservices
Soft Skills
communicationcollaborationtechnical leadershipmentoringAgile methodologiesdecisivesupportivecollaborative