Location: Spain (on-site)Sector: Fintech / Electronic Money / Payments About the Role We are looking for a hands-on Tech Lead / Engineering Lead to join a new fintech venture launching in Spain, backed by the solid financial and operational foundation of a major international group. This is a key opportunity to shape the technology platform from the ground up, owning technical delivery, architectural integrity and engineering quality as the product evolves from MVP to a scalable, high-load platform. The role combines technical leadership, architecture and hands-on software engineering, working closely with Product, Architecture and both internal and external development teams.

Key Responsibilities Technical Leadership & Delivery: Lead internal developers and external contractors, setting priorities, managing dependencies, timelines and quality, and ensuring predictable delivery.

Architecture & Engineering Quality: Ensure adherence to architectural decisions, conduct technical reviews, manage technical debt and establish engineering standards across code, testing, security and deployment. Hands-on Development: Remain technically involved through complex code reviews, prototypes and production development when required to unblock the team or reduce technical risk.

External Team Management: Oversee external development partners, ensuring transparency, knowledge transfer, code ownership and minimization of vendor dependency.

SDLC & Operations: Establish and improve CI/CD, Definition of Done, release management, observability and incident/root-cause processes.

Scalability & Resilience: Design and oversee distributed systems capable of supporting high loads, with a strong focus on fault tolerance, security, observability and disaster recovery.

Team Building: Participate in hiring and progressively build the internal engineering team as the platform and business scale.

Requirements Level:



Senior Software Engineer / Tech Lead / Development Lead with strong hands-on experience and proven ownership of architecture and delivery.

Experience: 8+ years in software development, including at least 3 years in a technical leadership role.

Go Expertise: Strong production experience with Go/Golang is mandatory. Candidates must be comfortable developing and reviewing production Go code, including concurrency, context management, resource control and testing.

Architecture: Strong experience with distributed systems, microservices, fault tolerance and synchronous/asynchronous communication.

Backend & APIs: Experience with g RPC/Protobuf, REST/Open API, API versioning, authentication, retries and idempotency.

Cloud & Infrastructure: Production experience with AWS, Kubernetes, Docker, Terraform/Ia C and CI/CD/Git Ops.

Data & Messaging: Strong Postgre SQL knowledge and experience with event-driven architectures, Kafka or equivalent, messaging and workflow patterns.

Security & Observability: Good understanding of OAuth2/OIDC, IAM/RBAC, secrets management, secure SDLC and modern observability practices such as Open Telemetry, metrics, logs and traces.

Industry: Experience in fintech, banking, payments or other regulated environments is strongly preferred.

Leadership: Proven experience managing both internal engineers and external development teams, with the ability to challenge deliverables and maintain high technical standards.

Mindset: Pragmatic, hands-on and comfortable working in a greenfield environment, balancing technical excellence, scalability, security and speed of delivery.

Languages: Strong technical English (B2+). Spanish is a plus.

Target Technology Stack

Go AWS Kubernetes/EKS Docker Postgre SQL g RPC/Protobuf REST/Open API Kafka Terraform Git Ops Open Telemetry Prometheus/Grafana Experience with Keycloak, Vault, Temporal, Camunda or React/Next.js is a plus.

📌 Tech lead of development / engineering lead - hands-on (fintech scale-up | spain) (Madrid)
🏢 Antal International
📍 Madrid