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# Senior Backend Engineer - System Services

- **Company:** Context Labs
- **Location:** Amsterdam, Netherlands
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Apache Accumulo, Application Programming Interfaces (APIs), Agile Methodology, Apache HTTP Server, C++ (Programming Language), Code Review, Databases, Constraint Logic Programming, CouchDB, Command-Query Responsibility Segregation (Software Development), Data Integrity, Digital Signature, Spring Framework, PostgreSQL, MySQL, NoSQL, Peer-To-Peer (P2P), Aerospike, Erlang, Software Security, Backend, Kubernetes, Information Technology, Apache Kafka, Functional Programming, Event Sourcing, Stream Processing, Software Version Control, Docker, Microservices
- **Published:** November 6, 2026
- **Apply:** https://www.adzuna.nl/details/5954537351

## About the Role

* Strong full-stack development experience with an end-to-end understanding of modern application architectures.
 * Expertise in distributed, peer-to-peer, and distributed ledger systems, including consensus algorithms and smart contracts.
 * Experience with distributed protocols and patterns such as RAFT, BFT, Gossip, DHT, CRDT, Event Sourcing, CEP, and CQRS.
 * Strong knowledge of cryptography and application security, including hashing, digital signatures, encryption, and data integrity/confidentiality practices.
 * Proficiency with Java frameworks such as Spring, Quarkus, and Helidon.
 * Experience with Docker-based microservices and Kubernetes.
 * Strong database experience across relational, NoSQL, and NewSQL technologies, including MySQL, PostgreSQL, Apache CouchDB, CockroachDB, FoundationDB, and Kafka.
 * Proficiency in unit/functional testing and source code management.
 * Strong problem-solving, communication, and attention to detail, with the ability to balance architectural strategy with hands-on execution.
 * Proficiency in source code management

Preferred Experience:

 * Experience with functional programming.
 * Experience with logic programming.
 * Experience with languages other than Java (Rust, Go, Erlang, Zig, C++ etc.).
 * Experience doing development on technologies such as: Streambase, Voldemort, Accumulo, Aerospike, VoltDB and or Kafka.
 * A bachelor's degree in computer science or related field.

## Description

Context Labs is seeking a Senior Backend Engineer to help drive forward our product initiatives with our Immutably Platform and analytics spaces. Working as a leader within the development team, the engineer will lead many aspects of developing our system services, APIs, and related product capabilities; as well as provide thought leadership, upskilling of less senior engineers, and taking part in defining strategic linkages across the company's products.

In this role you will:

 * Lead the services engineering team as a hands-on technical authority, providing architectural and development guidance.
 * Design, develop, and maintain APIs and platform services for the Immutably Platform, ensuring scalable, performant, and maintainable solutions.
 * Translate business requirements into technical designs, estimates, and development tasks in partnership with Product and Engineering.
 * Establish engineering best practices through exemplary code, architecture, documentation, and code reviews.
 * Collaborate within an Agile development environment to deliver high-quality software.
 * Mentor and coach engineers, helping resolve technical and methodological challenges.
 * Coordinate development efforts across distributed teams and multiple time zones.
 * Anything else as may reasonably be required by the company.