Introduction
At Quadrics Sistemas, a relatively young company part of a multi-national
technological group, we are building nextgeneration tools and Solutions for tomorrow’s
challenges in the Infrastructure (Compute/Storage/Networking) with focus on
Datacenter/Distributed systems, Security and Operational efficiency — including ICT/OT.
We are innovative without fear, and already recognized+awarded as such.
Our next challenge is all about applied PQC [Post-Quantum Cryptography] and its
role in protecting Humanity’s critical data —think genomics and other similarly sensitive
data— private and safe from today’s and tomorrow’s threats.
Together with our colleagues from five other OBs, we work as a single team across
companies, geographies and time zones as need arise.
Job Definition
We are building a next-generation [Cyber]Security solution for Key Management
based on QRNGs [Quantum Random Noise Generators], dealing with storage, clusters and
overall system integrity matters.
As a (Junior) Golang Developer, you will:
- Develop libraries for interfacing with low-level subsystems of Linux: lvm, pci
devices, netlink
- Integrate with and help evolve the Quantum RNG SDK & client libs
- Develop components for integrity validation of the system (including TPM2
interactions)
- Implement parts of advanced cryptosystems
- Develop APIs and CLI interfaces to test, validate and interact with the solution
- Design, implement and run comprehensive tests of the resulting components
The corresponding Senior positions will:
- Design, supervise and implement the most complex parts of lowlevel libraries(list
above)
- Co-design, implement and validate advanced database interface components
- Co-design, implement and validate integrity validation components
- Design integrations/library APIs for and implement the most complex parts of
Latticebased PQC algorithms and other cryptographic algorithms
- Design, implement and validate integration with hardware crypto-wallets (e.g.
NitroKeys)
- Design unit, validation and integration tests for the overall solution
- Design and supervise implementation of the agents performing the actual per-node
tasks
- Specify and validate CI/CD pipelines as appropriate at each stage of the project

- Coordinate with sysadmins/packagers to create final deliverables / installation sets
for the appliance prototype + production version.
We are believers in FOSS since our foundation, and part of the ecosystem. We will be
sharing a very substantial part of the outcomes from this R&D&i project with the
Community as FOSS (Apache2/MPL2/MIT as appropriate) and also via knowledge
sharing.Candidate Profile
We are looking for passionate, brilliant, proactive, self-driven, motivated and
committed software developers (backend or full-stack) to help build the next stage in Data
Privacy&Security Solutions for Open/Distributed systems — think datacenter-scale
information management systems (actual: DataSpaces, data warehouses, AI/ML training
source repositories, etc)
Requirements: Skills & Experience
Education: BSc Eng (MSc Eng preferred) in Computer Engineering or very close degree.
From reputable Polytechnic Universities around Europe: you need to understand
algorithmic complexity, graphs and system internals.
Work Experience of at least 3 years after graduation.
Experience (varies with position) in at least one backend programming language (Go
preferred — if not you’ll learn on the job ;).
Version Control Systems: Git (+workflow +GitOps)
Operating System/Environment: GNU/Linux. We are a Linux-only organization (just like all
our sister companies)... for almost two decades and counting !
English: if you had doubts.... C1 required. Please see notes below for details.
Methodologies: some exposure to Agile-like preferred (FDD, Scrum). Test-Driven
Development.
Desirable Traits
- UNIX/Open Systems internals’ familiarity. Linux netlink/namespaces very much
desired
- Security / Cryptography fundamentals (or better)
- Storage fundamentals: Devices/LUNs/Volume Groups/Logical Volumes/Snapshots;
RAID; Erasure Coding; Encrypted devices
- Relational Database management systems (+some SQL); PostgreSQL is what we
use.
- Server/services architecture fundamentals
- RESTful APIs (or similar); OpenAPI.
- Distributed systems knowledge (e.g. RPC/Corba, busses/queues, locking,
consensus algorithms)
- Observability, design-for-test

Outstanding  candidates will have experience in designing complex distributed systems /
architectures and/or low-level hardware and software (deep) understanding.
Personal Attributes
- Teamwork attitude; self-motivated and having good communication skills
- Innovative, and focused on results
- Availability for (limited) business travels
Work Environment
This is a hybrid/remote position with flexible schedule and objective-based
performance assessment with strict deadlines and ambitious goals.
Working Language & Tools
English: We are part of an international organization and most of our flagship clients are
international; hence our work language is English (“official language”). At a minimum,
basic work communication proficiency is required; if needed we’ll take care of refreshing
your English through permanent training/use ;)
On a daily basis, you will probably speak Spanish with your spanish-speaking colleagues
around Iberia, if and only if no non-spanish speakers or colleagues are present.
All written design, code and documentation shall be written in (formal/technical) English.
- Our day-to-day internal communication is organized around Mattermost™ (Slack™
lookalike) and Zoom™, plus [corporate] email.
- We usually favor regular text-editors, but specialized IDEs are acceptable
Development/Deployment/Testing Facilities
We have an IaaS MSP in the group (our own “Cloud”) and operate our own partially-
undergroup laboratory (electronics integration+testing / server validation).
Infra/DevOps
We have our own sysadmins / system technicians, who operate our private+shared
infrastructure within W-A-T, including VCS servers. Suitable CI/CD pipelines on demand.
Diversity/Tolerance Statement
W.A.T is committed to fostering a diverse work environment and proud to be an “equal
opportunity employer”. As we highly value diversity in our current and future employees, we
do not discriminate (including in our hiring and promotion practices) on the basis of
race/color, religion, national origin, gender, gender expression, sexual orientation, age,
marital status, disability status or any other characteristic protected by Law. Please note
however that lack of respect to others is strongly frowned upon and grounds for contract
termination.

Position Characteristics
Your base salary will be determined based on your location, experience, and the pay
of other employees in similar positions. The base salary range is EUR 40 000 – 58 000
gross/year, (**depends on the position and relative qualifications**) with an additional
bonus of up to 15/25% based on individual, team and company performance metrics.
Modality & Flexibility
We are offering a hybrid/remote position, though you currently need to live
somewhere in Spain, in order to be able to attend in-person meetings with colleagues or
customers within the required short notice.
Our flexible schedule policies allow employees to adjust their work time (“online”)
to match their natural rythm better. Note that there are “required attendance” time
windows daily – to make planning team/area/all-hands meetings feasible :)
Benefits
Employees enjoy a minimum 30 work-day vacation per year (w/ limited carryover)
and mandatory two-weeks off period yearly to minimize burn-out.
We provide employment stability and career plans with yearly salary+position
reviews.
- Private Healthcare premium Insurance with SANITAS. Full-coverage/no co-pay.
- Additional PTO (“vacation”) for your birthday, Christmas’ Eve & New Year’s Eve.

Additional Benefits & Perks
- Commitment with holistic well-being – custom individual benefits: “If it is the right
thing to do for our employees, we find a way to make it happen”
◦ People Operations is there to help you make the most of yourself.
- Company-wide “Free Days” (PTO; variable per year) subject to team objectives
fulfilment
- Choice (relative) of work tools/equipment: laptop, screen, editors, etc [[TBC]]
- Time-off allowances for medical visits, bureocratic duties, etc
- Extensive support programs, including extended parenthood leave (up to 24 weeks
paid) and flexible time off for relatives’ care.
◦ We care about our team-mates and their loved ones