Somos una empresa internacional de ingeniería e innovación. Trabajamos en distintos sectores como espacio, defensa, telecomunicaciones, seguridad o transporte.  ¿Quieres más información sobre nuestros ambiciosos proyectos?  Consulta nuestra web, ¡te sorprenderás!

We're looking for a Senior Software Engineer (.NET) to lead software development activities for Command and Control (C2/C4ISR) systems and contribute to strategic Defence projects.

🎯 Responsibilities
<ul>
<li>Provide technical leadership and coordinate a team of software developers.</li>
<li>Organize development activities and support team members' professional growth.</li>
<li>Contribute to software architecture design and define technical solutions.</li>
<li>Develop software components using .NET and C#.</li>
<li>Plan and supervise development activities, identify risks, and resolve technical challenges.</li>
<li>Perform code reviews and promote best practices for software quality and maintainability.</li>
<li>Collaborate with systems engineering, integration, and validation teams on requirements definition, effort estimation, testing, and customer demonstrations.</li>
<li>Contribute to national and European projects involving artillery solutions, unmanned systems (UxV) integration, and other advanced Defence capabilities.</li>
</ul>

🛠️ Requirements
<ul>
<li>Degree in Computer Engineering, Telecommunications Engineering, or a related field.</li>
<li>4–6 years of experience in software development, preferably in technically complex projects.</li>
<li>Solid experience in object-oriented software development with .NET and C#.</li>
<li>Knowledge of software design principles and development best practices.</li>
<li>Knowledge of distributed applications, APIs, and web services.</li>
<li>Experience with version control systems such as Git and development management tools.</li>
<li>Ability to organize tasks, make technical decisions, and solve problems independently.</li>
<li>Good level of English for working with technical documentation and participating in international meetings.</li>
<li>Strong communication and teamwork skills.</li>
<li>Interest in combining hands-on programming with technical team coordination.</li>
</ul>

🤗 We offer
<ul>
<li>Flexible start and finish times.</li>
<li>Intensive working hours on Fridays and during summer.</li>
<li>Personalized career development plans.</li>
<li>Training and language-learning support.</li>
<li>National and international mobility opportunities.</li>
<li>Competitive compensation with ongoing reviews.</li>
<li>Flexible compensation and discounts on selected brands.</li>
<li>Wellbeing program including health, dental, and accident insurance.</li>
<li>Free fruit and coffee.</li>
<li>Physical, mental, and financial wellbeing training.</li>
</ul>

english

Software Architecture

Distributed Systems

API Design

.NET

Senior software engineer (.NET) – Command and Control Systems

We're looking for a Hardware FPGA Engineer to develop onboard navigation systems within the aerospace and defence sector.

🎯 Responsibilities
<ul>
<li>Design and implement digital FPGA architectures for embedded systems.</li>
<li>Develop programmable logic using VHDL.</li>
<li>Define and analyse technical design requirements.</li>
<li>Perform functional simulations and verify the correct operation of designs.</li>
<li>Conduct hardware testing and validation activities in a laboratory environment.</li>
<li>Participate in the complete FPGA development lifecycle, from requirements definition through implementation and verification.</li>
<li>Collaborate with multidisciplinary teams to integrate hardware and electronic systems.</li>
</ul>

🛠️ Requirements
<ul>
<li>At least 2 years of experience in FPGA hardware development within complex and regulated technical environments.</li>
<li>University degree in Systems Engineering, Electronic Engineering, Telecommunications Engineering, or a related field.</li>
<li>Experience with FPGA development, including digital architecture design, functional simulation, and hardware verification in a laboratory environment.</li>
<li>Experience implementing signal processing algorithms, such as FFT and filters.</li>
<li>Strong proficiency in the VHDL hardware description language.</li>
<li>Ability to understand electronic and computing architectures and work with structured systems engineering methodologies.</li>
<li>Experience preparing technical documentation, including design documentation, test documentation, and related deliverables.</li>
</ul>

➕ Nice to have
<ul>
<li>Knowledge of GNSS signal processing.</li>
<li>Experience with version control systems, such as Git.</li>
</ul>

🤗 Benefits
<ul>
<li>Flexible start and finish times.</li>
<li>Intensive working hours on Fridays and during the summer.</li>
<li>Personalized career development plan.</li>
<li>Training and language learning support.</li>
<li>National and international mobility opportunities.</li>
<li>Competitive compensation with ongoing reviews.</li>
<li>Flexible compensation options and discounts on selected brands.</li>
<li>Wellbeing program including health, dental, and accident insurance.</li>
<li>Free fruit and coffee.</li>
<li>Physical, mental, and financial health training.</li>
</ul>

VHDL

Technical Skills

Systems Engineering

Functional Testing

Embedded Hardware

Hardware engineer

We're looking for a Radio Frequency Hardware Engineer to develop the analog processing chain (front-end) for GNSS receivers within the defence and aerospace sector.

🎯 Responsibilities
<ul>
<li>Define and analyze the technical and functional requirements of RF systems.</li>
<li>Design RF system architectures, identifying functional blocks and their interfaces.</li>
<li>Select and integrate commercial off-the-shelf (COTS) components, including oscillators and ADCs.</li>
<li>Design and develop prototypes of the analog processing chain for GNSS receivers.</li>
<li>Define, plan, and execute functional tests to verify compliance with system requirements.</li>
<li>Perform hardware integration and validation activities, identifying issues and proposing technical solutions.</li>
<li>Use laboratory equipment to characterize and verify prototypes, perform measurements, and analyze results.</li>
<li>Prepare technical documentation, including requirements specifications, architecture descriptions, interface definitions, test procedures, and validation reports.</li>
<li>Collaborate with multidisciplinary teams during the integration of electronic and RF systems.</li>
</ul>

🛠️ Requirements
<ul>
<li>At least 2 years of experience in RF hardware systems development.</li>
<li>University degree in Systems Engineering, Electronic Engineering, Telecommunications Engineering, or a related field.</li>
<li>Experience in systems engineering, including requirements definition, system design, functional architecture, and interface definition.</li>
<li>Experience designing and integrating electronic systems based on commercial off-the-shelf components.</li>
<li>Experience defining, preparing, and executing hardware functional tests and requirements verification activities.</li>
<li>Hands-on experience using laboratory equipment for hardware testing and characterization, such as oscilloscopes, signal generators, spectrum analyzers, and multimeters.</li>
<li>Ability to analyze experimental results, identify integration issues, and propose technical solutions.</li>
<li>Experience preparing technical documentation, including requirements specifications, design documents, test procedures, and validation reports.</li>
</ul>

➕ Nice to have
<ul>
<li>Knowledge of the analog reception chain for GNSS signals.</li>
<li>Familiarity with CRPA (Controlled Reception Pattern Antenna) technology.</li>
</ul>

🤗 We offer
<ul>
<li>Flexible start and finish times, with intensive working hours on Fridays and during summer.</li>
<li>Personalized career development plans, training, and language-learning support.</li>
<li>National and international mobility opportunities.</li>
<li>Competitive compensation with ongoing reviews, flexible compensation, and brand discounts.</li>
<li>Wellbeing program including health, dental, and accident insurance; free fruit and coffee; and physical, mental, and financial health training.</li>
</ul>

System Architecture

Requirements Analysis

Integration

Radio Frecuency Hardware Engineer

We're looking for a Software Engineer Architect with experience in software architecture, analysis, and development to contribute to strategic Cyber Defence projects.

🎯 Responsibilities
<ul>
<li>Contribute to the entire software lifecycle, from understanding needs and defining requirements to designing architectures, developing, and integrating solutions.</li>
<li>Design architectures for web applications and distributed systems.</li>
<li>Develop Java applications using the Spring Framework and Spring Boot.</li>
<li>Design and implement REST APIs, components, services, and interfaces.</li>
<li>Work with service-oriented architectures (SOA) and microservices.</li>
<li>Perform functional analysis and requirements specification.</li>
<li>Prepare technical and design documentation.</li>
<li>Collaborate with multidisciplinary teams using agile methodologies.</li>
</ul>

🛠️ Requirements
<ul>
<li>At least 2 years of experience in software architecture, analysis, and development.</li>
<li>Professional experience with Java-based web applications.</li>
<li>Knowledge of web application and distributed systems architecture design.</li>
<li>Experience with service-oriented architectures (SOA) and microservices.</li>
<li>Experience with UML modelling.</li>
<li>Familiarity with Enterprise Architect, Visual Paradigm, or similar tools.</li>
<li>Knowledge of the Spring Framework and Spring Boot.</li>
<li>Experience designing and implementing REST APIs.</li>
<li>Experience designing components, services, and interfaces.</li>
</ul>

🤗 Benefits
<ul>
<li>Flexible start and finish times.</li>
<li>Intensive working hours on Fridays and during the summer.</li>
<li>Personalized career development plan.</li>
<li>Training and language-learning support.</li>
<li>National and international mobility opportunities.</li>
<li>Relocation package for professionals moving from another country.</li>
<li>Competitive compensation with ongoing reviews.</li>
<li>Flexible compensation and brand discounts.</li>
<li>Wellbeing program including health, dental, and accident insurance.</li>
<li>Free fruit and coffee.</li>
<li>Physical, mental, and financial wellbeing training.</li>
</ul>

Spring Framework

Spring Boot

Java

Software engineer architect

About Joppy

Our Mission

But we met each other in 2015. Two companies after (and too much spam, selection processes and infinite human resources bugs), we decided to build our own project.

Five years later we have succeeded matching companies with tech professionals. We are specialized in talent from Spain, but day by day we receive offers from any global place.

Our community is our strength. Joppy is what it is thanks to them. We have specialists from diverse tech areas: Backend, Frontend, Fullstack, Big Data, QA, DevOps, Product, Mobile…

Founded in 2018

+3.500 tech jobs

+{total_users} Joppyters

Hi Joppyter! We're Nico, David, Felipe and Antonio… and an incredible team with five more members. We are a tech team with more than 15 years of experience that have decoded the perfect recruitment process.

Beyond sales—it's about finding the right solution for you

Give me code and I'll give you back a work of art

If product is a bingo, he always does line

Dr Jekill & Mr Hyde or Dr Designer & Mr Front?

Give me a challenge and I will return talent

Connecting talent and people… without superpowers

Development, talent, product, content... our team comes from different areas but has the same goal: the match.

Our team

Tech talent code and companies code don't need to be opposites

Job offer that really matches 100% with candidate. Candidate 100% interested in a company.

We break the code to give companies as much information as possible but candidates only answer a few questions.

We have been inside and outside tech selection process. We know how the machine works… and we are trying to fix it.

Honesty

Simplicity

Trust

Get the Joppy app on your mobile device to access all features on the go

Joppy Native App

We create a company page for you where you can showcase the most important aspects to attract talent (Employer Branding), including all the job postings you have posted. Every candidate who applies will be displayed on the platform.

Career page

+1,520 startups, scaleups & corporates

Who trust us to attract top talent

You'll have access to a dashboard where you can easily manage both your job postings and the candidates who apply. What does this dashboard include?

: The layout help you to better organize candidates you've filtered or who have progressed in the hiring proces

: Organize and sort candidates according to which step they are in the hiring process

: Take notes of the candidates to not miss relevant information about the interviews, highlights or any other relevant information.

: You can communicate directly with all the candidates who apply through the dashboard with a direct chat.

Dashboard

Frequently Asked Questions

We're sorry, there was a problem with the payment. Please try again by reviewing your payment details or contact us.

Something went wrong

You will shortly receive an email with your account details so you can start publishing offers!

Payment was successful!

The ATS, simplified.

Nothing more, nothing less

Designed to give you exactly what you need to attract, organize and connect with top tech talent.

No unnecessary extras, just a seamless way to manage your tech hiring process with ease.

We only accept offers from:

Joppy ATS

A plan for every company

Pricing

We'll perform a 'lite' evaluation (without using our full potential) to provide an assessment of the candidates applying to your job postings, highlighting the aspects that make them a good fit.

Lite vetting

Find news, tools, trends and more in our techfriendly space. Developer? Recruiter? Curious? All yours.

Latest posts (yes, we have a tech blog too)

Join the companies already using Joppy to connect with the right talent and make hiring faster, easier and more effective.

Ready to hire with Joppy?

Real stories from companies that trust Joppy to improve their hiring process.

Business cases

Performance at Joppy

Business cases - Joppy

Describe the type of profile your are always open to check...

Please,  don't use this for one-time positions

Tell us what type of candidates you are always searching for and we will send you an email every time we interview a candidate that match

Need a custom candidates feed?

Joppy Tech Talent

Every week we pick the 5 top candidates among those who have been active in Joppy, the ones that nobody would miss, and share them with you directly to your email, Whataspp or Telegram.

Once a week you'll get an email with the profile of the top 5 candidates among those who have been active in Joppy

Weekly digest on your email

No one will know you've joined

No spam from Joppy or subscribers

Leave whenever you want

Get the candidates on the privacy-focused messaging app alternative

Subscribers of the channels can not see others subscribers

Don't worry about getting messages from other subscribers

You can leave the channel as fast and easy as you join in: 1 click!

Join our channels

Get the candidates on the most used messaging app in the world

Get top active candidates on your email every week

From different markets, sizes, countries… Joppy is a place where business and techies meet each other, creating good term relationships. From peer to peer.

+1200 companies have already found tech talent using Joppy

Explore technology companies, their teams, tech stacks and active opportunities on Joppy.

Tech companies and jobs

All the information about {name} and their open job positions posted on Joppy.

{name}'s job offers - Joppy

Name

Write us about any questions, doubts or suggestions you have

Contact with Joppy

Your profile in less than two minutes. Just a few questions… and it's done.

Only connect with job offers that match 100% with your aptitudes, expertise and needs.

No unwanted chats. Only companies from offers you have accepted can write to you.

No CV required

Get perfect matches

You decide who can talk to you

We understand your code, the dev code. Zero spam, 100% match. You have the power to choose.

Looking for your next job challenge?

In this report we take a closer look at how developers are incorporating AI into their work. To gain valuable insights and understand their usage patterns, we conducted a survey that gathered responses from 470 developers within our community

Techies & AI

We give you a sneak peek: every week we select the top candidates among those actively seeking employment and send them to you via email, WhatsApp, or Telegram. No spam, and completely anonymous!

Do you want to see top candidates without creating an account?

This report on technology hiring trends for 2024, made in colaborattion with Circular, goes beyond statistics. It captures real-world insights from those actively involved in technology hiring.

Crisis? Trends in Tech Recruitment 2024

We analyze the candidate experience from job setup to selection process, showing how each touchpoint affects hiring success, with practical tips to increase applications and reduce friction.

Candidate Experience Report

Relax, we can solve it. We are here to help you to understand techie code... and Joppy is part of it.

Any doubts?

Talent Platform + employer branding + extra services + dedicated Talent Advocate to help you on a more efficient recruiting process, saving your time and effort.

Customized

Premium service

Access to our platform without any limit: Post offers, match with developers, get vetted & manually evaluated candidates and schedule interviews with them.

Candidate's salary

Talent Platform

Match +50K developers and pay only if you hire.

You pay only if you hire!

Remember

For employers

Only 15% of developers are actively looking for a job. Focus your efforts on tech people that are really interested in working with you.

A deal between the talent and the opportunity

And match with some of our 45,000 candidates

No search required. Complete a few fields and candidates that match with your offer will be able to apply.

An expert has already done an evaluation of your candidates, but the final decision is up to you.

You are one click away to chat with the most interesting candidates. Ask them anything you need to know.

How easy is using Joppy?

1. Define your offer

2. Check candidates

3. Chat with them

Our matching system connects your offer with the right candidates. We have a database of +50K!

We manually screen all candidates before they reach you, and we add our expert opinion about their profiles. Then you can chat with candidates that match with your needs.

We're integrated with most of the ATS. Focus your effort on recruiting and save time on boring processes.

Using Joppy is free. If you don't hire, you don't pay!

Don't search

Match top candidates

ATS integration

Pay if you succeed

You will find some data about the Tech ecosystem mainly focused in Spain (Barcelona & Madrid) and some information about companies who are working remotely.

Tech salaries and ecosystem report

We analyzed the tech market from 2025 through February 2026 and compare what candidates want with what companies offer in terms of salary, work modality, and hard skills.

Tech Market Report

More than 30 pages with data, graphs and highlights on the points on which techies and those in charge of the tech selection process do not agree.

Tech selection process

We're doing something right, and it's not just us saying it; our numbers speak for themselves

30 pages of trends, statistics and data from tech sector experts: web development professionals, IT departments managers and recruiters.

Tech trend Report: predictions for 2023

We are not an agency standing between you and the candidate. We handle the noise, the sourcing, the screening and the activation, so you can focus on the interviews and the final decision. All in days, not months.

We speed up your process. You stay in control.

Tell us who you are looking for and we will show you assessed, available candidates who actually want to talk to you.

Find the person your team needs

Tell us the profile, salary and setup you're looking for.

Post your role and tell us what you need

We match your role against our community and activate the right fits.

We evaluate and activate the ones who match

No middlemen, straight to every interested candidate.

Only talk to people who applied to your offer

How it works

Fresh data to understand where hiring processes break, what tech talent values, and how to design selection journeys that build trust from the first touchpoint.

What tech talent expects from a strong Candidate Experience

Conversations with leaders, founders and tech profiles about hiring, culture, product and the everyday work behind teams that actually perform.

Hear how people building tech teams think

Interesting content

AI + human review

Validated match

With a real intent to move

Only active candidates

Top 20 best candidates

Zero noise, zero random CVs. Only evaluated candidates who chose to apply to your role.

candidates you would want to hire

Stop filtering CVs. Connect only with

You cold-message hundreds of candidates, but almost no one replies because they have no intention of moving.

You post and in 24h you have 200 CVs in your inbox. You have to filter all of them, and less than 3% are an actual match.

Our specialist team and our AI system filter every candidate so you only talk to people who are a match and want to move.

Software engineer architect

Job Description

GMV

Photos

About the team

Benefits and perks

Location