Senior Mail Engineer

SD Worx; Katowice; On-site; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Private medical insurance 100% covered

25 vacation days

Laptop and equipment provided

Workation: work from abroad

Flexible working schedule

4-week reduced summer hours

Cobee flexible retribution options

Career development opportunities

Job summary

SD Worx invites a Senior Mail Engineer to join our Workplace Services Engineering team. You will own the engineering, security, and operation of our enterprise mail environment across international teams, working with Microsoft 365, Exchange Online, and mail security solutions.

Ideal candidates bring 5+ years in enterprise messaging, strong troubleshooting skills, and a security-first mindset. The role offers flexible work schedules, global collaboration, and opportunities to drive platform

Qualifications

• Minimum 5 years of experience with enterprise mail platforms and infrastructure.
• Strong hands-on experience with Microsoft 365 and Exchange Online administration.
• Solid understanding of mail flow, connectors, transport rules, and hybrid environments.
• Proven experience troubleshooting complex mail delivery, routing, and authentication.
• Hands-on expertise with SPF, DKIM, DMARC, TLS, and secure SMTP.
• Experience with secure email gateways and anti-spam/phishing/malware protection.
• Knowledge of mass mailing platforms and sender reputation management.
• Experience in incident, problem and change management processes.
• Excellent English communication; capable of explaining complex concepts to diverse stakeholders.
• Experience in Agile, international environments; ability to manage multiple priorities.

Responsibilities

• Manage, maintain, and improve the enterprise mail infrastructure for an international workforce.
• Operate and optimize Microsoft 365 and Exchange Online mail services, including mail flow and connectors.
• Strengthen the security posture of the mail environment with authentication technologies.
• Manage email security solutions including anti-spam, anti-phishing, and malware protection.
• Support bulk communication platforms and ensure deliverability and sender reputation.
• Provide third-line support for complex mail delivery and security issues.
• Document mail landscape and participate in platform simplification and standardization.
• Collaborate with Product Owners, security, and infrastructure teams to improve reliability.

Skills

Microsoft 365

Exchange Online

Mail security

Email deliverability

Troubleshooting

Security-first mindset

Cross-functional collaboration

Tools

Secure email gateways

SPF/DKIM/DMARC/TLS

Mass mailing platforms

Job description

SD Worx is a leading European provider of Payroll & HR services with global reach. We have offices across Europe and in Mauritius. Our purpose is to bring people solutions to life, enabling organisations of all sizes to turn Human Resources into a source of value for both the business and its people.

Our people solutions cover the entire employee journey – from getting people paid to attracting, rewarding and developing talent.

About the role:

We are seeking a Senior Mail Engineer to join our Workplace Services (WPS) Engineering team within Business Technologies. The team is responsible for delivering secure, reliable, and future-ready enterprise messaging services across SD Worx, supporting more than 10,000 employees internationally. In this role, you will take ownership of the engineering, security, and operational excellence of our enterprise mail environment. You will work with Microsoft 365 and Exchange Online technologies, mail security solutions, and mass mailing platforms while helping shape the future of enterprise messaging within SD Worx. This is an excellent opportunity for an experienced professional who combines strong technical expertise with a security-first mindset and enjoys working in an international environment.

Which tasks can you expect?

• Manage, maintain, and improve the enterprise mail infrastructure supporting an international workforce.

• Operate and optimize Microsoft 365 and Exchange Online mail services, including mail flow, connectors, and transport rules.

• Strengthen the security posture of the mail environment using SPF, DKIM, DMARC, TLS, secure SMTP, and other email authentication technologies.

• Manage and improve email security solutions, including anti-spam, anti-phishing, malware protection, and secure email gateways.

• Support and optimize bulk communication and mass mailing platforms, ensuring deliverability and sender reputation.

• Provide third-line support for complex mail delivery, routing, authentication, and security-related issues.

• Contribute to the simplification, standardization, and documentation of the mail landscape.

• Collaborate with Product Owners, security teams, infrastructure teams, vendors, and support teams to improve platform reliability and security.

• Support projects, upgrades, migrations, and service improvement initiatives.

• Act as a point of contact for integrations between mail platforms and other enterprise services.

• Participate in the future roadmap and evolution of enterprise messaging services.

• Create and maintain technical documentation, procedures, standards, and operational handover materials.

What do you have to offer?

• Minimum 5 years of experience working with enterprise messaging platforms and mail infrastructure.

• Strong hands‑on experience with Microsoft 365 and Exchange Online administration.

• Solid understanding of mail flow, connectors, transport rules, and hybrid messaging environments.

• Proven experience troubleshooting complex mail delivery, routing, and authentication issues.

• Hands‑on expertise with email security technologies such as SPF, DKIM, DMARC, TLS, and secure SMTP.

• Experience working with secure email gateways and anti‑spam, anti‑phishing, and malware protection solutions.

• Knowledge of mass mailing platforms, sender reputation management, and email deliverability best practices.

• Experience providing third‑line support and working within incident, problem, and change management processes.

• Strong analytical and troubleshooting skills with a proactive, solution‑oriented mindset.

• Excellent communication skills in English and the ability to explain complex technical concepts to both technical and non‑technical stakeholders.

• Experience working in Agile and international environments.

• Ability to work independently, manage multiple priorities, and continuously drive improvements.

What do we have to offer?

• Comprehensive training and development programs.

• Flexible working schedule

• Private medical insurance 100% covered by SD Worx

• 25 vacation days

• 18 hoursfor personal matters

• Reduced summer hours: 36 hours instead of 40 per week, for 4 weeks (to be chosen in July or August)

• Cobee flexible retribution options: meals, transportation, etc.

• Laptop and equipment provided

• Workation: possibility to work from abroad (where SD Worx has legal entity, up to 4 weeks per year)

• Learning opportunities: language courses (as per availability), individual training bonus, an individual development plan, and professional training

• Career growth: whether you want to become more of an expert in your field or want to expand your knowledge more horizontally, there is always room to grow within SD Worx!

Salary range information will be shared during the initial interaction with the Talent Acquisition team, either by phone or email.

Please note that certain benefits are country-specific and may vary depending on the location where the employee is hired.

Why join SD Worx?

• Be part of a European leader in Payroll and HR solutions.

• Influence how Technology teams operate at scale.

• Work with experienced leaders and product professionals across multiple countries.

• Help shape modern product operating practices and continuous improvement across the organisation.

• Join a culture that values autonomy, collaboration, innovation, and learning.

SD Worx values diversity and inclusion in the workplace. We welcome applications from all qualified candidates regardless of origin, nationality, gender, gender identity, sexual orientation, age, disability, religion, ethnic or social background, or stage of life.

All hiring decisions are made based on skills, experience and role‑related qualifications.