Senior Software Engineer (Golang/TypeScript/React)

Lever, Inc.; España; A distancia; EUR 50.000 - 65.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Fully remote

Flexible remote work

Independent contractor

Exposure to financial-data platform

Modern tech stack access

Descripción de la vacante

Lever, Inc. is seeking a Senior Software Engineer in Spain to build a data-intensive platform and own features end-to-end. You will design backend Go services and frontend React/TypeScript interfaces, collaborating with product managers and engineers to deliver scalable solutions.

You will contribute to architecture, testing, and production deployment, while upholding high standards and continuously learning in a remote, contractor setup.

Formación

• Proven track record in building production-grade software systems.
• Advanced proficiency in Golang backend services and concurrent systems.
• Strong frontend experience with React and TypeScript.
• Strong SQL skills with MariaDB or similar relational databases.
• Clean-code principles and idiomatic Go/TypeScript development.
• Experience with Docker and containerised deployment.
• Ability to design scalable, reliable software systems.
• Strong problem-solving and communication skills.
• Ownership of features from concept to production.
• Curiosity and willingness to learn new technologies.
• Experience with GitLab CI is a plus.
• Familiarity with Prometheus and Grafana desirable.
• Experience using AI tools to boost engineering productivity is a plus.
• Familiarity with Material UI, Airflow, Python, or Terraform beneficial.
• Experience with AWS and cloud infrastructure is advantageous.

Responsabilidades

• Design, develop, test, and maintain Golang microservices and React/TypeScript frontend apps.
• Own features from ideation through deployment and improvement.
• Build performant, accessible customer interfaces using React/TypeScript.
• Develop backend services with Go and deploy via Docker environments.
• Make architectural decisions balancing legacy systems and scalability.
• Improve performance, reliability, and observability of services.
• Maintain high engineering standards with clean-code and reviews.
• Collaborate with product and stakeholders to meet business needs.
• Contribute to automation and new tech to improve teams.

Conocimientos

Golang backend

React/TypeScript frontend

SQL relational databases

CI/CD practices

Docker

AWS cloud

Observability tools

Technical ownership

Excellent communication

AI tooling

Herramientas

GitLab CI

Docker

Prometheus

Grafana

AWS

Material UI

TypeScript

Go

Descripción del empleo

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Software Engineer (Golang/TypeScript/React) based in Spain.

As a Senior Software Engineer, you will help build and evolve a data-intensive platform used by major organisations to make informed business decisions. You will own features end-to-end, from initial concept and architecture through development, testing, and production. The role combines backend engineering in Go with modern frontend development using React and TypeScript. You will contribute to highly scalable systems that collect, process, validate, and serve large volumes of financial data. Beyond feature delivery, you will influence technical strategy, engineering standards, observability, and development practices. You will work within a collaborative, multidisciplinary team where technical ownership, continuous learning, and meaningful impact are highly valued.

Accountabilities:

• Design, develop, test, maintain, and enhance Golang microservices and React/TypeScript frontend applications.

• Take full ownership of features from ideation and technical design through implementation, deployment, and ongoing improvement.

• Build performant, accessible, and polished customer-facing interfaces using React, TypeScript, and established design systems.

• Develop reliable backend services and web application backends using Go and deploy applications through Docker-based environments.

• Make architectural and technical decisions while balancing existing systems, new technologies, scalability, performance, and maintainability.

• Improve application and service performance, reliability, monitoring, and observability.

• Establish and maintain high engineering standards through clean-code practices, code reviews, documentation, and consistent development patterns.

• Collaborate with product managers, engineers, and stakeholders across the organisation to understand business requirements and deliver effective technical solutions.

• Contribute to automation, process improvements, and new technologies that improve the efficiency and quality of engineering teams and business operations.

• Work with large-scale financial datasets and contribute to systems that collect, process, validate, and serve data to users.

• Troubleshoot technical issues and contribute to the continuous reliability and improvement of production systems.

• Share technical knowledge, communicate complex concepts clearly to technical and non-technical stakeholders, and contribute to a culture of continuous learning.

• Support and contribute to CI/CD, infrastructure, and observability initiatives where appropriate.

Requirements:

• Strong professional experience designing, developing, testing, and operating production-grade software systems.

• Advanced proficiency in Golang, including experience building backend services and working with concurrent or distributed systems.

• Strong frontend development experience with React and TypeScript, including the ability to build reusable, component-based applications.

• Strong SQL skills and experience working with relational databases such as MariaDB or comparable technologies.

• Solid understanding of clean-code principles, software design practices, and idiomatic Go and TypeScript development.

• Experience with Docker and containerised application deployment.

• Ability to design and maintain performant, scalable, and reliable software systems.

• Strong problem-solving skills and the ability to understand and work effectively within complex technical and business domains.

• Excellent communication skills, with the ability to explain complex technical subjects to both technical and non-technical audiences.

• Ability to take ownership of features and deliver solutions from concept through production.

• Curiosity and willingness to learn new technologies, understand unfamiliar business domains, and continuously develop technical skills.

• Experience with CI/CD pipelines, particularly GitLab CI, is an advantage.

• Familiarity with observability technologies such as Prometheus and Grafana is desirable.

• Experience using AI tools to improve engineering productivity or productionising AI solutions is a plus.

• Familiarity with Material UI, Airflow, Python, or Terraform is beneficial.

• Experience working with AWS and cloud-based infrastructure is an advantage.

Benefits:

• Fully remote working arrangement from Multiple locations.

• Flexible remote working environment with collaboration across international teams.

• Monthly compensation of USD 5,000–6,500, based on the stated contractor arrangement and experience.

• Opportunity to work as an independent contractor on a Business-to-Consultant basis.

• Opportunity to contribute to a data-driven platform used by major global organisations and financial institutions.

• Exposure to modern technologies including Go, TypeScript, React, AWS, Docker, SQL, CI/CD, and observability tooling.

• Opportunity to influence technical direction, architecture, engineering standards, and development practices.

• Collaborative environment with a multidisciplinary technology team and opportunities for knowledge sharing.

• Meaningful technical ownership, with responsibility for features from conception through production.

• Opportunities to develop skills in large-scale financial data, distributed systems, cloud technologies, and AI-enabled engineering.

• Please note that the contractor arrangement does not include paid time off or sick pay.