Back-End Engineer

Capventis; Dublin; Hybrid; EUR 70,000 - 120,000; Full time

Job summary

Capventis is seeking an experienced back-end engineer to join the R&D team, building a next generation business enablement system. The role focuses on Go-based services, event-driven architecture, and scalable data handling with PostgreSQL, Docker and Kubernetes.

Ideal candidates have 3+ years in production Go, strong API design skills, and experience with distributed systems and modern cloud tooling. Located in Dublin or UK offices, offering a cutting-edge tech environment.

Qualifications

• Go 3+ years production experience.
• Idiomatic Go and concurrency expertise.
• Experience with APIs design and patterns (n+1, dataloader).
• Distributed systems: message brokers/event-driven architecture (NATS, Kafka, RabbitMQ, SQS).
• DB knowledge: SQL/NoSQL, indexing, migrations, queries with EXPLAIN ANALYZE.

Skills

Go

Concurrency

Go Race detection tooling

APIs design

Distributed systems concepts

Connection pooling

Tools

PostgreSQL

Docker

Kubernetes

NATS JetStream

PgBouncer

Job description

Capventis is at an advanced stage of a major development project and needs to expand its technical team. T he development pulls together some of the latest technologies in databases, languages and environments. We are pioneering a transformative approach to data management and business organisation, one that challenges conventional methods and redefines the possibilities of modern enterprises. Our vision is bold and innovative, and we seek dynamic individuals who are passionate about shaping the future of how businesses operate . Join us at the cutting edge of technology and strategy, where your skills will help drive a revolution in efficiency, decision-making, and growth.

About The Role

We are looking for an experienced back-end engineer to join our R&D team working on a next generation business enablement system. The position is ideal for candidates who want to work in an environment of rapid innovation and invention, looking to challenge industry norms and standards. The role requires previous experience and knowledge in Go, event-driven services over NATS JetStream, PostgreSQL, Docker and Kubernetes.

Requirements

• Go (3+ years production)
  • Idiomatic Go
  • Concurrency
  • Go Race detection tooling
• DB
  • NoSQL/SQL (Database) joins, CTEs (incl. recursive), window functions
  • Indexing and query tuning with EXPLAIN ANALYZE
  • Vector Searching, Indexes
  • Connection pooling
  • Schema design and migrations
• APIs
  • Server-side experience (e.g. schema design, resolvers, N+1 / dataloader patterns, caching
  • Authentication/authorization fundamentals (e.g. OAuth 2.0, OIDC
• Distributed systems
  • Message brokers / event-driven architecture (NATS, Kafka, RabbitMQ, SQS)
  • At-least-once delivery, idempotency, retries, backpressure, consumer lag
• Infrastructure
  • Docker, and Kubernetes
  • CI/CD pipelines and container registries
  • Some cloud exposure (AWS preferred)
• NATS – JetStream, KV, Object Store, NEX
• Ory stack — Kratos, Hydra, Oathkeeper — or equivalent
• Connection poolers - PgCat, PgBouncer
• Parser/interpreter or DSL work; embedded scripting runtimes (QuickJS, WASM) WebAssembly in Go
• Load and performance testing (k6, Vegeta, Gatling)
• Learning & Development
• Opportunity to innovate and shape a new paradigm in business technology

Successful applicant s can be based out of Capventis head office (Dublin) or UK office (Anglesey), depending on domicile .