Solinide Photonics designes the photonic ICs that will power the next generation of AI and cloud infrastructure. Our flagship programme is an external laser source delivered in the OIF ELSFP (External Laser Small Form-factor Pluggable) form factor, a field-replaceable module that feeds optical power to co-packaged optics in switches, NICs, and AI accelerators. We are building an ultra power-efficient design, because the power a laser source wastes is power an AI datacentre then has to feed and cool, so efficiency sits at the heart of both our product and the case for more sustainable datacentres. The drive, control, and power electronics inside these modules are mission-critical: every millivolt of noise and every point of wall-plug efficiency shows up in the budget.

About the role

We are looking for a Senior Electrical Engineer, as an employee or on a consultant basis, to lead the electronics design of our ELSFP laser-source modules and supporting hardware, from schematic capture and multilayer PCB layout through to bring-up, validation, and production. The role centres on mixed-signal control and high-efficiency power design: the drive, control, and power electronics that turn a bare laser and optical assembly into a stable, energy-efficient, field-replaceable module. You will work hand in hand with our optical, mechanical, and firmware engineers, and act as the electronics interface to our contract manufacturers. This is a hands-on senior role, open to employees and consultants, with broad ownership of the electronics platform, and scope to extend and deepen as the programme scales.

What You Will Do

• Electronics design ownership: lead the electrical design of ELSFP modules and test fixtures from concept through to production release, in close partnership with optical, mechanical, and firmware engineers.

• Schematic capture: produce clean, reviewable schematics for analogue, digital, and mixed-signal circuits (KiCad preferred; Altium or Cadence also acceptable).

• PCB layout: lead multilayer PCB layout for compact, high-density modules, with careful attention to power integrity, grounding, and thermal-aware placement.

• Mixed-signal control: design the laser-diode drivers, TEC control, and the mixed-signal sensing and feedback loops that keep the optical source stable and well-characterised.

• High-efficiency power design: design efficient, low-noise DC/DC and linear power architectures, optimised for the wall-plug efficiency that underpins the product's sustainability story.

• Thermal partnership: work closely with the mechanical team on heat removal and TEC strategy, co-designing electronics and packaging to hit the thermal and efficiency budget together.

• Bring-up and validation: spend time on the lab floor bringing up prototypes, debugging with scope, source-measure units, and thermal instrumentation, and characterising designs against spec.

• DFM / DFT with suppliers: drive design-for-manufacture and design-for-test reviews with PCB and assembly suppliers, and lead the electrical side of NPI.

• Standards and compliance: ensure designs meet relevant EMI/EMC and safety requirements and align with the OIF ELSFP electrical interface.

• Mentorship: coach junior engineers and technicians, and help establish electrical design standards and review practices in the team.

What We Are Looking For

Required

• MSc in Electrical Engineering, Electronics, Engineering Physics, or equivalent (Swedish civilingenjör or international equivalent).

• Typically 7+ years of electronics design experience on compact electronic or optoelectronic products, or equivalent depth.

• Deep experience with schematic capture and multilayer PCB layout (KiCad preferred; Altium or Cadence also acceptable).

• Analogue and mixed-signal design experience focused on control and sensing loops.

• Experience designing high-efficiency power supplies (DC/DC and linear) for sensitive, low-noise loads.

• Experience taking an electronics design from concept to qualified production.

• Fluent in written and spoken English.

• Eligible to work in Sweden.

Strongly Preferred

• Direct experience designing photonic or laser drive circuits (laser-diode drivers, TEC control, bias and monitor-photodiode).

• High-speed digital and signal-integrity experience (controlled-impedance routing, high-speed interfaces, SI/PI simulation).

• Direct experience with pluggable optical transceivers (SFP, QSFP-DD, OSFP, CPO) or ELSFP.

• Familiarity with module management and low-speed control interfaces (I2C/MDIO, SPI, CMIS or similar).

• Experience with EMI/EMC pre-compliance and lab debugging.

• A track record in low-power, energy-efficient design and an interest in datacentre sustainability.

• Working knowledge of Swedish.

Not sure you tick every box? If the work excites you, send your application anyway, we’d genuinely love to see it.

What We Offer

• Competitive compensation as an employee salary or consultant rate; occupational pension, 30 days' vacation, and wellness allowance (friskvårdsbidrag) for employees.

• Flexible hours, hybrid working, and genuine support for parental leave and work-life balance.

• A close, technically strong team and a real chance to shape both the products and the engineering culture.