# Lead Software Engineer — Connectivity

**Company**: Mastercard
**Experience**: senior
**Job type**: full-time
**Category**: Engineering
**Industry**: Finance

**Apply**: https://mastercard.wd1.myworkdayjobs.com/en-US/CorporateCareers/job/Warsaw-Poland/Lead-Software-Engineer---Connectivity_R-294136?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/jobs/job_8546b464-acd

## Description

This role sits within Mastercard’s Open Finance Europe – Connectivity team, building and operating scalable API connectivity to financial institutions across Europe.

As a Lead Software Engineer, you will own end-to-end delivery of secure, reliable connectivity services. This is a hands-on role focused on solving complex problems, driving technical decisions, and delivering high-quality systems from design through production.

You will partner with Product and business stakeholders to deliver new capabilities, improve platform reliability, and scale integrations across markets.

**Core Responsibilities**

- Own end-to-end delivery of engineering solutions,from design through development, deployment, and production support

- Solve complex technical problems and drive system design decisions

- Design, build, and operate scalable APIs and backend services

- Review code and uphold high standards of quality, performance, and maintainability

- Apply best practices across SDLC, testing, security, and observability

- Collaborate with Product, Architecture, Security, and SRE teams

- Implement robust testing strategies (unit, integration, end-to-end)

- Drive automation and improvements in developer productivity and operational efficiency

- Mentor engineers and support them in solving technical challenges and growing their skills

**Technology Stack**

- C#, .NET 10, Web APIs

- Java/Spring Boot (plus)

- Azure (App Services, Blob Storage, KeyVault, CI/CD)

- AWS (Microservices, S3, Redis, CI/CD pipelines)

- PostgreSQL, Flyway

- Generative AI tools (GitHub Copilot, etc.)

**Requirements**

- 8–10 years of professional software engineering experience

- Strong hands-on experience building cloud-based, highly available systems

- Deep expertise in backend engineering (API design, reliability, production support)

- Proven ability to solve complex technical problems and influence design decisions

- Experience delivering and operating end-to-end systems in production environments

- Strong collaboration skills with Product and business stakeholders

- Familiarity with banking/payments/open banking (PSD2) environments

- Strong communication and problem-solving skills

## Skills

### Required
- C#
- .NET 10
- Web APIs
- Java
- Spring Boot
- Azure
- AWS
- PostgreSQL
- Flyway
- Generative AI

### Nice to have
- Open Banking
- bank connectivity at scale
- AI-assisted engineering tools
- infrastructure-as-code
- platform governance

---

Source: [Apply at mastercard.wd1.myworkdayjobs.com](https://mastercard.wd1.myworkdayjobs.com/en-US/CorporateCareers/job/Warsaw-Poland/Lead-Software-Engineer---Connectivity_R-294136?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)