Senior Software Engineer

Linnworks; Chichester; On-site; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Remote & flexible working

Hybrid options London

Laptop & home office budget

Private Medical Insurance

Group Life Insurance

Headspace wellbeing

EAP guidance

25 days holiday

Training & development

Job summary

Personio in the United Kingdom is seeking a Senior Software Engineer to design and deliver complex features in a production SaaS environment. You will own technically significant work, mentor junior engineers, and help maintain high quality and performance while aligning with our architecture.

This role offers remote-friendly flexibility with hybrid options in London or Chichester, strong team culture, and comprehensive benefits.

Qualifications

• Production SaaS experience with high-quality delivery.
• Ability to mentor engineers and influence through example.
• Strong focus on testing, performance and maintainability.
• Sound technical judgment under pressure.

Responsibilities

• Design and implement complex features and improvements.
• Take ownership of high-risk or technically significant work.
• Ensure solutions are maintainable, testable, and well understood.
• Help diagnose and resolve complex production issues.

Skills

SaaS experience

Complex delivery

Testing & performance

Mentoring others

Technical judgment

Tools

C#

Job description

Senior Software Engineer

Reports to: Engineering Team Lead

Works closely with: Engineering Tech Lead, QA team members

Software: C#

Location: UK / Estonia / US (remote-friendly within these regions)

Role purpose

The Senior Software Engineer is a high-impact individual contributor who delivers complex work and raises the effectiveness of the team around them.

This role exists to tackle technically challenging problems, support less experienced engineers, and contribute to sound technical decisions — all while remaining aligned with agreed architecture and standards.

Experience and capabilities

• Strong experience as a software engineer in a production SaaS environment

• Proven ability to deliver complex, high-quality solutions

• Strong understanding of testing, performance, and maintainability

• Ability to mentor others and influence through example

• Sound technical judgement under pressure

Why this role matters

Senior engineers set the technical tone within teams.

Done well, this role:

• Improves delivery quality and resilience

• Develops other engineers

• Reduces technical risk

What You'll Bring To The Role

Key responsibilities

Technical delivery

• Design and implement complex features and improvements

• Take ownership of technically significant or high-risk work

• Ensure solutions are maintainable, testable, and well understood

• Help diagnose and resolve complex production issues

Technical leadership (within the team)

• Provide guidance and mentoring to junior and mid-level engineers

• Contribute strongly to code reviews and design discussions

• Support the Engineering Tech Lead in maintaining technical quality

• Identify technical risks and raise them early

Collaboration and quality

• Work closely with QA to ensure confidence in delivered changes

• Engage constructively with Product and other stakeholders as needed

• Balance pragmatism with long-term thinking

What this role is not

• This is not a formal people management role

• This is not ownership of cross-team architecture

• This is not a substitute for a Tech Lead or Principal Engineer

• Senior engineers succeed by delivering difficult work and elevating others.

Why us?

Perks & Benefits

• Remote & flexible working – with hybrid options in London or Chichester

• Fantastic team culture based on trust and belonging.

• Laptop & home office budget – £500 to set up your ideal workspace.

• Private Medical Insurance with Aviva, including Dental & Optical.

• Group Life Insurance & Yulife Wellbeing & Rewards.

• Mental well-being support – Access therapy, mental health sessions, and yoga through a free premium subscription to Headspace.

• EAP confidential benefit – 24/7 access to compassionate guidance & expert advice

• 25 days holiday + bank holidays

• Training, support, and personal development