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Senior Backend Engineer (Go)

Remote, Málaga·Full-time·Added 4 months ago (last checked 26 Oct)

Block Labs

4 open roles

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Our summary

Work mode: Remote (Málaga)
Contract: Full-time
English: Required
Experience: 6+ years

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Skills

Nice to have

Kafka

Requirements

What we're looking for

6+ years of experience in backend development, ideally on high-throughput, real-time, or consumer-facing systems.
Strong proficiency in Go as a primary backend language; experience with gRPC and RESTful APIs is highly valued.
Solid understanding of distributed systems, multi-tenant architectures, and microservices.
Experience building consumer-facing or platform services where engagement, personalisation, or platform integrity matter is a strong advantage.
Comfortable working in cloud-native environments.
Deep commitment to software reliability, observability, and security best practices.
Excellent communication skills and a collaborative mindset.

Nice to have

Experience with rules engines, real-time scoring, or decisioning systems.
Background in fintech, real-time gaming and entertainment platforms, or other high-traffic consumer products.
Familiarity with event-driven systems, Kafka, or message queues.
Prior experience designing APIs for multi-tenant or white-label products.

The role

We are building the backend that powers how players experience our platform: a set of multi-tenant services that turn high-volume player activity into engaging, personalised, and trustworthy experiences. It is a broad and evolving remit, with real room to shape new products and capabilities as the platform grows.

You'll be joining a senior, highly technical team building greenfield backend services that react to player activity in real time and at scale. We value autonomy, craftsmanship, and long-term thinking, and we're building event-driven systems designed for resilience, low latency, and trust.

What you'll do

Design and build distributed backend services that power player engagement across a multi-tenant platform.
Develop core platform features and services across a broad and evolving set of player-facing domains, from engagement and personalisation to platform integrity.
Consume and process high-volume player activity streams, integrating with internal platforms (payments, game providers, player data) and relevant third-party tools.
Collaborate with product, frontend, data, and infrastructure teams to deliver reliable, end-to-end systems.
Contribute to architectural design and drive technical decisions across services.
Ensure scalability, fault-tolerance, and data integrity, including the correctness guarantees required when balances and player-facing decisions are involved.
Maintain clean, testable, and well-documented Go code following industry best practices.

Nice to Have

What kind of culture can I expect?
Mature, mission-driven, and low-ego. We value clarity over noise, outcomes over theatrics, and pace without chaos. If you're one of the smartest minds in your craft and want to build with other experts, you'll feel at home here.

About Block Labs

Block Labs is the European technology hub of Block, Inc., a global fintech company known for its Square payment ecosystem and Cash App. The company focuses on building innovative financial products and services, with a strong emphasis on engineering and product development. Block Labs operates as a key part of Block's international expansion, offering roles in software engineering, data, and product management.

Industry: Software
Founded: 2009
Employees: 10,000+
Headquarters: Oakland, USA
In Spain: Barcelona, Madrid

Good to know if you are moving

Block Labs has a significant engineering presence in Spain, with offices in Barcelona and Madrid, offering opportunities for international tech talent.
The company provides relocation support for eligible roles, including visa sponsorship and assistance with moving to Spain.
Block Labs is known for its inclusive and flexible work culture, with hybrid and remote work options available for many positions.
As part of Block, Inc., employees have access to global career development opportunities and a strong focus on financial inclusion and innovation.

In their own words

About the company & team

Block Labs is a premier technology studio operating at the bleeding edge of Web3, Artificial Intelligence, and iGaming. We don't just ship features; we engineer high-scale, production-grade platforms that power the next generation of digital products.

We are a collective of senior engineers, product strategists, and builders who refuse to compromise on architecture. Whether we are designing autonomous multi-agent AI systems, building decentralized financial infrastructure, or architecting high-frequency iGaming platforms, our standard is excellence.

We move fast, but we build for the long term. If you are looking to work alongside a team that values deep technical expertise, thoughtful system design, and product ownership, Block Labs is where you belong.

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