Tech Lead (Backend): Billing & Fees

Jobgether; España; Hybrid; EUR 90,000 - 140,000; Full time

Benefits offered by this job

Fair and competitive salary

Flexible working hours

Hybrid/remote working approach

Travel opportunities

Collaborative culture

Opportunity to influence technical方向

Job summary

Jobgether is seeking a Tech Lead (Backend) for Billing & Fees based in Spain. You will steer the technical evolution of a critical fintech billing platform, shaping architecture and roadmap for fee configuration, invoicing, and reconciliation.

This role blends hands-on backend work with technical leadership in a distributed, remote-first environment. You will mentor engineers, design scalable services, and collaborate with Product, Finance, Commercial, and Ledger teams, ensuring accuracy,

Qualifications

• 7+ years backend software engineering experience.
• Hands-on with Java or Kotlin and Spring Boot.
• Proven ability to design and deliver distributed, production-grade systems.
• Strong knowledge of microservices and event-driven architectures.

Responsibilities

• Own the technical direction, architecture, and engineering roadmap for the Billing & Fees subdomain, ensuring the platform supports evolving commercial models and high transaction volumes.
• Design, develop, and maintain scalable billing services covering fee policy configuration, fee calculation, invoice generation, billing adjustments, and reconciliation.
• Replace manual billing workflows with automated, reliable processes that improve operational efficiency and reduce errors.
• Build and maintain robust data pipelines and integrations across systems to ensure accurate data flows from processing to invoicing and reporting.
• Establish engineering practices that protect financial accuracy and auditability, including idempotency and audit trails.
• Lead technical design submissions, architecture reviews, and service design using domain-driven design and hexagonal patterns.
• Mentor engineers through technical design and code reviews while raising engineering standards.
• Collaborate with Product, Finance, Commercial, Back Office, Ledger to translate requirements into reliable integrations.
• Drive operational excellence with observability, monitoring, incident response, and service recovery.
• Guide the team in managing production workloads and incident resolution.

Skills

Java/Kotlin

Spring Boot

Technical leadership

Distributed systems

RESTful APIs

Event-driven architecture

Tools

Kafka

AWS SQS

Redis

MySQL/PostgreSQL

Grafana/Prometheus

Job description

This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Tech Lead (Backend): Billing & Fees based in Spain.

This is an opportunity to lead the technical evolution of a critical billing platform within a growing financial technology environment. You will shape the architecture and roadmap for services that manage fee configuration, transaction calculations, invoicing, adjustments, and reconciliation. The role focuses on replacing manual processes with automated, scalable infrastructure that supports increasingly complex commercial agreements and high transaction volumes. You will combine hands-on backend engineering with technical leadership, guiding architecture decisions and mentoring engineers. Working closely with Product, Finance, Commercial, and other engineering teams, you will translate complex financial requirements into reliable software solutions. The position offers a hybrid or remote working approach within an international, distributed environment.

Accountabilities

• Own the technical direction, architecture, and engineering roadmap for the Billing & Fees subdomain, ensuring the platform supports evolving commercial models, transaction volumes, and operational requirements.

• Design, develop, and maintain scalable billing services covering fee policy configuration, fee calculation, invoice generation, billing adjustments, and reconciliation.

• Replace manual billing workflows with automated, reliable processes that improve operational efficiency and reduce errors.

• Build and maintain robust data pipelines and integrations across systems such as Snowflake, Salesforce, Ledger, and internal financial services, ensuring accurate data flows from transaction processing through invoicing and reporting.

• Establish engineering practices that protect financial accuracy and auditability, including idempotency, traceability, reconciliation, exception handling, and comprehensive audit trails.

• Lead technical design submissions, architecture reviews, and service design, applying domain-driven design, hexagonal architecture, and event-driven patterns.

• Remain hands-on in production code development, technical design, and code reviews while mentoring engineers, resolving complex challenges, and raising engineering standards.

• Collaborate with Product, Finance, Commercial, Back Office, Ledger, Digital Assets, and Fiat teams to translate business requirements into clear technical solutions and reliable integrations.

• Drive operational excellence by establishing standards for observability, monitoring, performance, incident response, and service recovery.

• Guide the team in managing production workloads, including message-processing failures, dead-letter queues, incident resolution, and system resilience.

• Set expectations for testing, CI/CD, documentation, and technical debt management to ensure consistent delivery and long-term platform maintainability.

• Balance delivery speed, scalability, reliability, and business priorities while maintaining ownership of business-critical services.

Requirements:

• At least 7 years of backend software engineering experience, with strong hands-on expertise in Java or Kotlin and Spring Boot.

• Experience leading technical initiatives or providing technical guidance and leadership to other engineers.

• Proven ability to design and deliver complex, distributed, production-grade systems.

• Strong knowledge of microservices and event-driven architectures, including technologies such as Kafka and AWS SQS.

• Experience with relational databases such as MySQL or PostgreSQL and caching technologies such as Redis.

• Background working with financially sensitive systems, such as billing, invoicing, payments, ledgers, fee calculation, or reconciliation platforms, where accuracy, consistency, auditability, and reliability are essential.

• Strong architectural knowledge, including domain-driven design, hexagonal architecture, service decomposition, bounded contexts, and asynchronous communication patterns.

• Demonstrated ability to own technical architecture and make sound engineering decisions while balancing scalability, reliability, delivery timelines, and business requirements.

• Strong API design experience, including developing and evolving RESTful APIs, maintaining backward compatibility, and establishing reliable integration patterns.

• Solid understanding of financial data integrity in distributed environments, including transactional consistency, idempotency, error recovery, and reconciliation.

• Experience mentoring engineers through technical design, code reviews, problem-solving, and complex delivery challenges.

• A strong production ownership mindset, including experience operating business-critical systems, participating in on-call rotations, and managing incidents.

• Familiarity with observability tools such as Grafana, Prometheus, and Micrometer.

• Experience with CI/CD pipelines, infrastructure-as-code, automated testing, and modern software delivery practices.

• Strong communication and stakeholder management skills, with the ability to collaborate effectively across Engineering, Product, Finance, and Commercial teams.

• Comfortable combining hands-on engineering contributions with technical leadership in a distributed, remote-first environment.

Benefits:

• Fair and competitive salary, based on experience and relevant certifications.

• Flexible working hours and a hybrid/remote working approach.

• Flexible holiday policy.

• Opportunities to travel to offices around the world.

• A collaborative, growth-oriented culture with passionate colleagues.

• An open and creative environment where employees can contribute to technical direction, company culture, and future opportunities.

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