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LastPass

Software Engineer (.NET)

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Remote from
Portugal
Salary
Undisclosed
Department
Software Engineering
Employment
Full Time
Experience
Open level
Published
Apply before
20 Nov 2026
Listing views
51
Application actions
3
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AI Summary

The role, at a glance.

LastPass is seeking a .NET Software Engineer to develop and modernize backend commerce, subscription, billing, and global payment-processing platforms. The role centers on building scalable C#/.NET Core services and REST APIs, integrating payment gateways and regional payment methods, and maintaining reliable customer-facing systems. The engineer will collaborate closely with QA, SDETs, database developers, product, finance, data, and operations teams. Strong knowledge of relational databases, Entity Framework Core, Docker, object-oriented design, and web security is required, while microservices, AWS, Zuora, and Angular are advantageous. This is a remote full-time role for candidates in Portugal.

Role DNA

A quick view of the complexity, pace, ownership and collaboration implied by the job description.

Job Complexity

4/5
EasyHard

Pace & Pressure

4/5
RelaxedFast-paced

Autonomy Level

4/5
GuidedFull ownership

Communication Load

4/5
IndependentCollaborative
AI insightThe role involves business-critical billing and payment systems where reliability, security, integration quality, and failure handling are essential. Engineers must navigate complex backend architecture while working across several technical and business functions.

Salary analysis

Estimated compensation compared with the broader US market for similar roles.

Estimated job median (per year)Market rate
$55,000
US market range (per year)$45k–$70k
AI insightThe yearly pay period is inferred from the job context; it was not explicitly stated by the employer. No employer salary is disclosed. Estimated annual market compensation is shown in USD for a mid-level .NET backend engineer in Portugal; these are AI estimates rather than verified employer compensation.

Core skills

Skills and capabilities most closely associated with this opportunity.

C#NET CoreREST APIsRelational DatabasesEntity Framework CoreObject-Oriented ProgrammingDockerWeb SecurityPayment Gateway IntegrationCommerce SystemsMicroservicesAWSBackground ServicesAngular
Sample interview questions
How would you design a resilient integration with an external payment gateway?

I would isolate the gateway behind a provider interface, use idempotency keys for payment requests, enforce timeouts and retry policies with backoff, and distinguish transient failures from business declines. I would also persist request and reconciliation states, secure secrets through a vault, and add monitoring and alerts for failed or delayed transactions.

What practices do you use when building scalable REST APIs in .NET?

I define clear resource contracts, validate input consistently, use appropriate status codes, and keep controllers thin by placing business logic in services. For scalability, I use asynchronous I/O, pagination for collection endpoints, caching where appropriate, structured logging, and automated tests for both happy paths and error conditions.

How do you approach Entity Framework Core performance issues?

I first measure the issue through traces and database-level query analysis. Typical improvements include projecting only required fields, avoiding N+1 queries, using AsNoTracking for read-only operations, indexing frequently queried columns, batching writes, and using compiled or raw queries only when profiling demonstrates a need.

How would you protect sensitive commerce and payment data in a backend service?

I would minimize collection of sensitive data, avoid storing card data where tokenization is available, encrypt data in transit and at rest, and apply least-privilege access controls. I would use managed secret storage, audit sensitive operations, sanitize logs, and maintain secure dependency, authentication, and authorization practices.

Describe how you would collaborate with finance and product teams on a billing feature.

I would begin by clarifying business rules, lifecycle states, reporting requirements, edge cases, and acceptance criteria with both teams. I would translate these into an observable technical design, share trade-offs early, deliver iteratively with test scenarios, and validate the implementation against finance reconciliation and customer experience needs.

This analysis is generated from the job description. Salary estimates, role characteristics and sample answers are guidance, not employer-provided facts.
Opportunity details

About this role.

About LastPass
LastPass delivers Secure Access Essentials, helping individuals and organizations manage and protect access to AI, applications, and credentials straight from the browser. Trusted by more than 100,000 businesses and millions of users worldwide, LastPass blends strong security with everyday simplicity. From discovering unapproved AI and applications to reducing login friction and securing credentials across the business, LastPass delivers on its mission to give everyone seamless access to everything they need to work, move fast, and stay protected as their environments evolve.

Curious about our products? Visit our website and try it free!

We welcome new ideas, support your growth, and recognize your value, if this aligns with what you are looking for in your next career move, Join Us!

LastPass is looking for a Software Engineer (.NET):

As a .NET Engineer on the team, you will build and evolve the backend commerce and payment platforms that support LastPass subscriptions, billing, and global payment processing. You will help modernize critical systems, strengthen platform reliability, and deliver integrations with payment providers.

About the Team:

This Team is a core commerce engineering team within LastPass’s Data & Commerce Cluster. The team is responsible for architecting, scaling, and maintaining the core backend platforms that power global e-commerce, billing, and payment processing for LastPass.

We are working mostly with .NET, in rare cases using Angular.

If you are passionate about complex problem solving and motivated by scale, then this is the role for you!

Who will you work with?

You will work closely with fellow .NET engineers, SDETs, QA engineers, database developers, and engineering leaders to build, test, and support reliable commerce and payment services. You will collaborate with Product, Finance, Data, Operations, and other engineering to deliver secure, seamless payment experiences for LastPass customers.

What are some of the exciting challenges you will be working on?

  • Developing scalable .NET services and REST APIs. Delivering payment gateway integrations and regional payment methods
  • Contribute to planning and delivery of features in collaboration with a dynamic team
  • Advocate for non-functional requirements and cost-effective solutions. Develop, test, and maintain solutions within your domain
  • Collaborate with other teams, engage in decision-making, and influence technical direction
  • Contribute to a successful, customer-facing application, shaping it with new features to meet user needs

What does it take to work at LastPass?

  • Proficient in C# and .NET Core for web app development
  • Skilled in REST API creation and consumption
  • Experienced with relational databases and EF Core
  • Familiar with OOP best practices, Docker, and web security
  • Good communication skills
  • Collaborative team player excelling in problem-solving

It’s great, but not required:

  • Experience with microservice architecture
  • Experience in Commerce systems and different payment providers
  • Zuora developer knowledge
  • Experience with AWS including secret manager (or other Cloud provider) and background services
  • Foundational experience with Angular

Why LastPass?

  • The leader in secure access
  • High-growth, collaborative environment with inclusive teams
  • Remote-first culture
  • Competitive compensation
  • Flexible Paid Time Off policies, including but not limited to: Quarterly Self-Care Days (4 extra paid days off annually) and Volunteer Days
  • Parental leave
  • Comprehensive health coverage, including dependents
  • Home office setup support
  • LastPass Families free account for up to 5 members
  • Continuous learning and development opportunities, including an annual learning stipend to invest in your growth
  • Peer-to-peer recognition through Quantum Workplace
  • Employee Assistance Program for well-being support
  • Remote work stipend to support your home office needs
  • Short-Term or Remote-Centric Work Arrangements for added flexibility

Unlock your potential with us – your skills, experience, and unique perspective matter more than just checking the boxes. Apply today, and let’s build the future together!

We’re building an inclusive community that reflects the people of all races, genders, sexual orientations, national origins, backgrounds, and perspectives who share our world.

For more information about how we process your personal data and your rights, please refer to our Candidate Privacy Notice.

Apply now >

This job listing has been manually reviewed by the Jobicy Trust & Safety Team for compliance with our posting guidelines, including verification of the company's legitimacy, accuracy of job details, clarity of remote work policy, and absence of misleading or fraudulent content.

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