Software Engineer .NET - Spain

Auctane; Madrid; On-site; EUR 34,000 - 50,000; Full time

Benefits offered by this job

Private health insurance

26 days of holiday

Central Madrid office

Annual salary review

Training budget €2000/year

Wellness program

Volunteer day

Job summary

Auctane in Madrid, Spain, is seeking a Software Engineer to design, develop, and maintain advanced software solutions. You will lead projects, mentor teammates, and influence architectural decisions to deliver high-quality products.

The role focuses on cloud-based APIs, microservices, and scalable platforms, with emphasis on agility, DevOps, and collaboration with cross-functional teams.

Qualifications

• Experience designing and developing advanced software systems.
• Proficiency in OO programming concepts, algorithms, and data structures.
• Focus on software architecture design, DevOps, and product development.
• Strong automation mindset to save time and effort.
• Ability to manage multi-system deployments without impacting clients.
• Proficiency across multiple programming languages and agile practices.

Responsibilities

• Design system architectures and develop complex software components with functional and non-functional requirements in mind.
• Produce high-quality code following industry standards.
• Lead testing, identify issues, and optimize performance and scalability.
• Deliver cloud-oriented API components and microservices with top engineering standards.
• Mentor junior engineers and guide technical growth within the team.
• Collaborate with production and management to ensure solution consistency and compliance.

Skills

C# .NET

TypeScript

JavaScript/React

AWS

Cloud automation

Design patterns

Agile methodologies

DevOps practices

English

Job description

About us

At Auctane, we are united by a passion to help businesses deliver — whatever their size, wherever they are, and however they operate. We make it possible for businesses to meet the ever-changing requirements of their industry and customer expectations. Auctane products enable hundreds of thousands of businesses to annually mail and ship billions of items — over $200 billion worth — to recipients around the globe.

The Auctane family of mailing and shipping software products includes ShipStation, Stamps.com, ShipStation API, Metapack, GlobalPost, and Packlink. Our partners include Amazon, UPS, USPS, eBay, BigCommerce, Shopify, WooCommerce, and Walmart.

Our values

Win as One. Delight Customers. Deliver Great Outcomes.

About the role

As a Software Engineer, you will play a key role in designing, developing, and maintaining advanced software solutions. You will be responsible for leading projects, participating in strategic technology decision-making, and mentoring less experienced team members. Your expertise in programming and software engineering will be essential for achieving project goals and ensuring the delivery of high-quality products.
This role is based in Madrid, Spain.

What will you be doing?

• Designing system architectures and developing complex software components while considering both functional and non-functional requirements.
• Creating high-quality software code in accordance with industry best practices and standards.
• Managing software testing processes, identifying and resolving issues, and optimizing system performance and scalability.
• Delivering cloud-oriented API-based components and microservices adhering to the highest engineering standards.
• Mentoring junior team members by providing technical support, guidance, and sharing knowledge and experience to facilitate their professional growth.
• Influencing team direction and task prioritization.
• Tackling complex problems requiring deep analysis and evaluation of diverse factors.
• Collaborating closely with other departments, such as production teams, and management, to ensure solution consistency and compliance.
• Engaging in effective cooperation with team members.
• Working collaboratively with internal and external stakeholders.
• Inspiring and facilitating constructive discussions around complex topics.
• Providing timely, concise, and actionable feedback to team colleagues.
• Promoting a knowledge-sharing mindset.
• Participating in recruitment interviews for your team.
• Maintaining openness to communication with both local and external partners.
• Developing mentoring skills, fostering learning, and sharing deep engineering expertise with peers.

What are we looking for?

• Experience in designing and developing advanced software systems.
• Proficiency in object-oriented programming concepts, algorithms, and data structures.
• Continuous focus on enhancing skills in software architecture design, DevOps practices, and product development.
• Strong orientation toward task automation to save time and effort.
• Implementation of improvements and optimizations in daily operations.
• Planning and managing complex multi-system deployments without impacting client operations.
• Ability to balance the demands of delivering high-quality software within tight deadlines.
• Programming across multiple languages.
• Experience with Agile methodologies and DevOps practices.
• Expertise in cloud infrastructure automation.
• Knowledge and experience in use of design patterns
• Proficiency in English is required for this role

What will make you stand out?

• Experience with:
• C# .NET
• TypeScript
• JavaScript / React (or any other JS framework)
• Amazon Web Services

What do we offer?

Clear and transparent compensation plan. The salary range goes from 34,000 € to 50,000 €. We will discuss the indicated range with you in the first recruiting call to ensure that we are on the same page.

Flexible salary benefits
Save on personal income tax with Cobee for expenses like transport, restaurants, and kindergarten.

Private health insurance
Free for all employees via Cigna , plus we cover 50% for your family members.

Generous time off
Enjoy 26 days of holiday per year (23 base days + your birthday off , Christmas Eve, and New Year’s Eve).

Your gear, your choice
Whether you prefer Mac or Windows , or need an extra screen, we’ll make sure you’re set up for success from day one.

Annual Salary Review
We’re committed to recognizing your professional growth. Every year, we review salaries to reflect your individual development, achievements, and impact on our business success.

Grow your skills
We offer up to €2000/year in training (certifications, conferences, workshops) to boost your growth—both technical and personal.

Learning resources
Access internal and external training , including platforms like LinkedIn Learning , completely free.

Holistic wellness program
Includes access to Wellhub, Curalinc (psychological support), Rocketlawyer (legal advice), and regular health webinars & challenges.

Volunteer day
Take one day off a year to volunteer and give back. Bonus points for sharing pics on Slack!

Free therapy vouchers
Because your mental health matters.

Health & wellness support
Get up to €55/month to cover your gym or fitness classes (yoga, boxing, pilates, etc.).

Weekly language classes
Improve or learn a new language (English, Spanish, French, Italian, or German) in small groups with expert instructors—on us!

Time for health
Get 8 hours per year for personal medical appointments and 10 hours per year to support your family’s medical needs.

Work-life balance
We’re flexible and people-first. We know life happens, and we aim to make work work for you.

Inclusive, upbeat culture
No suits here—just a welcoming, casual, and respectful space where diversity is celebrated , and you can be your full self.

A global, multicultural team
We’re made up of 20+ nationalities , speaking 10+ languages. All communication is in English, so everyone’s included.

Packlink Pro discount
Enjoy 99% off your personal shipments using our platform.

Referral bonuses
Know someone amazing? Earn €1K–€3K when you refer candidates we hire—depending on the role.

Central Madrid office
When you want a change of scenery, drop by our office in the heart of Madrid— free snacks and drinks included!

Team events
We work hard and play hard with regular team-building activities and meetups.

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