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# Backend Software Engineer

- **Company:** Haiven
- **Location:** Barcelona, Spain (Remote available)
- **Salary:** €80,000.0 - €100,000.0
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), Adaptable Database Systems, Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Amazon Cloudfront, Amazon S3, Cloud Computing, Code Review, Relational Databases, Database Models, Software Debugging, Identity and Access Management, PostgreSQL, Message Broker, Scrum Methodology, RabbitMQ, Rapid Prototyping Process, Redis, Software Engineering, Data Streaming, TypeScript, WebSocket, WebRTC, Real Time Systems, ReactJS, Caching, Backend, Vue.js, Stripe, Material UI, Apache Kafka, Front End Software Development, Cloudwatch, Restful APIs, Terraform, Microservices
- **Published:** July 14, 2026
- **Apply:** https://www.adzuna.es/contact-us.html

## About the Role

+ 3 to 5 years of professional software development experience
 + Demonstrated experience building backend services and APIs in Go or a similar systems-level language
 + Experience designing, querying, and optimizing relational databases (PostgreSQL)
 + Working knowledge of JavaScript or TypeScript and at least one modern frontend framework (SolidJS, React, or Vue)
 + Experience working with cloud infrastructure on AWS (ECS, S3, IAM, or similar services)
 + Experience with real-time communication patterns such as WebSockets, event queues, or pub/sub systems
 + Experience designing and consuming RESTful APIs
 + Experience supporting production systems with real users
 + Familiarity with caching technologies such as Redis or Valkey
Preferred Qualifications

 + Experience with Go in production environments
 + Experience with SolidJS or reactive frontend frameworks
 + Experience with message brokers or event streaming (NATS, Kafka, RabbitMQ)
 + Experience with Terraform or other infrastructure-as-code tooling
 + Experience working with AI or ML-backed features at the application level (content moderation, scoring, or recommendations)
 + Experience building developer-facing tools, admin dashboards, or internal platforms
 + Experience with on-chain and payment integrations (Stripe or similar)
What is important for us in a person?

 + Experience in gaming, community platforms, or digital marketplaces
 + Experience in startup companies, ideally digital distribution platforms
 + Ability to work independently and take ownership of features end-to-end
 + Strong communication skills and comfort working in a small, fast-moving team
 + Demonstrated ability to communicate complex technical concepts clearly in English, Required: Ability to communicate complex technical concepts clearly in English.

## Description

We are hiring an experienced Backend Engineer to join our talented team and help build and scale our digital distribution and communications platform. You will focus on designing, building, and maintaining backend services in Go (including REST APIs), WebSocket-driven real-time systems, database modeling, and cloud infrastructure on AWS. You will also contribute to frontend features using SolidJS and JavaScript when needed, ensuring seamless integration between the client and server. We're building real-time chat and direct messaging, community social hubs, developer studios, a virtual economy with on-chain payment processing, an AI-powered trust and safety engine - all backed by a Go monolith designed to scale into microservices. You will work across these systems, shipping features used by real developers and players, and help evolve the platform as we move through Alpha and into Beta. Apply your skills using Agile SCRUM methodologies, rapid prototyping,, and use of AI to augment
code review and testing. Reporting to the VP of Product.
If located in Isreal or offshore, you must be available at least 3-hours each day during afternoons in the U.S. Pacific Time Zone.
More on Haiven Visit www.haiven.gg for more on our company, team, and culture.
How to Apply Tell us why you're a perfect fit for this role by applying on InGame Job!
Team size and structure?
14
For which tasks (responsibilities)?

 + Design, build, and maintain backend services and REST APIs in Go for the platform
 + Architect then build and extend real-time systems including WebSocket-based chat, direct messaging, notifications, and presence
 + Design and optimize PostgreSQL schemas, queries, and scalable data models
 + Integrate with AWS services including ECS, S3, CloudFront, Cognito, and CloudWatch
 + Build and consume event-driven pipelines using NATS and JetStream for our proprietary trust and safety engine and signals system
 + Implement backend logic for platform features such as studio management, game publishing workflows, virtual currency, and payment processing
 + Contribute to frontend development using SolidJS and JavaScript/TypeScript, connecting UI components to backend APIs via TanStack Query
 + Debug production issues, improve performance, and contribute to platform stability
 + Participate in and lead code reviews, technical discussions, and architectural decisions
 + Contribute to improving engineering processes, testing, and documentation


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