Senior Backend Engineer

• entertainment, financial, and logistics sectors. We are committed to driving
• technological transformation and foster a culture centered on collaboration,
• innovation, and excellence. Our supportive and inclusive environment promotes
• substantial career growth. By partnering with distinguished engineering teams in
• Latin America and the United States, Lean Tech delivers cross-industry solutions,
• maintaining a significant presence in both regional and international markets.

Position Overview

• As a Backend Integration Engineer at Lean Tech, you will play a crucial role in
• developing and maintaining scalable, event-driven backend services that power
• mission-critical systems. This is a backend-focused engineering position with a
• strong emphasis on building robust integration services using F# and Kafka within
• a cloud-native architecture, primarily on AWS. You will contribute to architectural
• decisions, drive best practices for reliability and observability, and collaborate with
• cross-functional teams to ensure seamless integration workflows. The role involves
• hands-on development, participation in code reviews, design documentation, and
• an on-call rotation to ensure the continuous availability and responsiveness of
• production systems. We are seeking individuals with a solid understanding of
• functional programming and distributed systems concepts, who are adept at
• working with relational databases and event-driven architectures. This position
• requires hands-on experience with F# and functional programming. Familiarity with
• containerization using Docker is expected, and knowledge of CI/CD practices,
• GitHub Actions, and Terraform for deployment templates is beneficial. You will be
• part of a dynamic team focused on reliability-first development, aiming to minimize
• off-hours incidents through thoughtful design and proactive monitoring.

Key Responsibilities

• Design and implement scalable, event-driven backend integration services
• using Kafka, with a focus on message passing, stream processing, and robust
• delivery semantics.
• Contribute to architectural decisions and drive best practices for integration
• reliability, observability, and maintainability within a cloud-native environment.
• Develop and maintain robust backend services using F#
• Design and evolve RESTful and gRPC APIs with a focus on versioning, clear
• contracts, and comprehensive documentation.
• Utilize Kafka as the primary messaging system for event-driven
• communication.
• Design and operate distributed systems for real-time event processing,
• addressing performance and reliability through techniques like partitioning,
• batching, backpressure handling, windowing, and stateful stream processing.
• Collaborate with cross-functional teams to align integration services with
• business workflows and ensure seamless data flow.
• Implement comprehensive unit and integration testing strategies to ensure
• code quality and system stability.
• Maintain operational awareness across infrastructure, CI/CD pipelines, and
• application layers, including participation in an on-call rotation for production
• systems.
• Continuously improve system design and performance, focusing on reducing
• technical debt and enhancing user experience.
• Participate in code reviews, contribute to design documentation, and engage
• in peer mentoring.
• Manage and debug data interactions with relational databases such as
• PostgreSQL and SQL Server, and potentially NoSQL databases like Mongo.
• Support the transition to AWS cloud infrastructure, leveraging services like S3,
• SQS, and Lambda where applicable.
• Contribute to the development and maintenance of CI/CD pipelines, with
• familiarity in tools like GitHub Actions and Terraform being beneficial.
• Collaborate with front-end engineers to deliver end-to-end solutions,
• occasionally contributing to front-end development as needed.
• Participation in an on-call rotation will be required in the near future as the
• team grows.

Required Skills & Experience

• Professional experience with F# for backend service development.
• Solid understanding of functional programming principles, which are
• considered a core requirement.
• Strong grasp of distributed systems fundamentals including messaging
• semantics, consistency models, backpressure strategies, windowing, and
• eventual consistency.
• Practical experience with event-driven architectures and message passing
• concepts, including idempotency and eventual consistency.
• Hands-on experience with Apache Kafka: designing topics, partitions,
• consumer groups, and applying delivery semantics such as at-least-once and
• exactly-once.
• Hands-on experience developing and operating cloud-hosted applications,
• preferably on AWS, due to an ongoing migration from Azure.
• Strong understanding of relational databases, including SQL querying,
• indexing, and debugging. Experience with PostgreSQL and SQL Server is
• utilized.
• Proficiency in unit and integration testing practices.
• Experience with Docker for containerization is required.
• Familiarity with CI/CD practices is necessary for maintaining a strong working
• knowledge of the stack.
• Ability to work collaboratively in high-impact teams, supported by strong
• documentation and communication practices.

Nice to Have Skills

• Familiarity with container orchestration tools like Kubernetes.
• Familiarity with gRPC or similar RPC frameworks for inter-service
• communication, including defining service contracts and versioning schemas.
• Knowledge of infrastructure and networking within cloud environments.
• Familiarity with stream processing concepts such as partitioning, parallelism,
• low-latency processing, backpressure, batching, windowing, and stateful
• stream processing (e.g., using Kafka Streams or equivalent frameworks).
• Experience with CI/CD tools and practices, including GitHub Actions and
• Terraform for deployment templates.
• Familiarity with NoSQL databases, such as MongoDB.
• Experience with front-end technologies like React and TypeScript.
• Familiarity with observability tools and practices for production systems.
• Experience with SQL Server and PostgreSQL databases.

Soft Skills

• Clear and Concise Communication: Ability to articulate complex technical
• designs, decisions, and intent effectively through documentation and
• discussions, ensuring alignment with cross-functional teams and stakeholders.
• Strong Sense of Ownership and Initiative: Demonstrates a proactive and selfmotivated
• approach to problem-solving and continuous improvement, taking
• responsibility for the reliability and maintainability of integration services.
• Adaptability and Collaboration in Distributed Teams: Thrives in a dynamic,
• fast-paced, and distributed work environment, valuing feedback and
• contributing to team growth through empathetic collaboration.
• Problem-Solving and Continuous Improvement Mindset: Possesses strong
• analytical skills to identify and resolve technical challenges, coupled with a
• proactive drive to enhance system design, performance, and reduce technical
• debt.
• Reliability-First Development Focus: Committed to building highly reliable and
• observable systems, actively contributing to minimizing critical incidents
• through thoughtful design and operational readiness.

Why You Will Love Working with Us

• Join a powerful tech workforce and help us change the world through technology
• Professional development opportunities with international customers Collaborative
• work environment Career path and mentorship programs that will lead to new
• levels. Join Lean Tech and contribute to shaping the data landscape within a
• dynamic and growing organization. Your skills will be honed, and your contributions
• will play a vital role in our continued success. Lean Tech is an equal opportunity
• employer. We celebrate diversity and are committed to creating an inclusive
• environment for all employees.

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