Senior system engineer Work, Jobs in Harlow, Ess (with Salaries)

Senior Software Engineer
Relay Technologies —London
- Full-time
- Machine learning
Chief Technology Officer
Artsy and Artnet —London
- £200,000 - £350,000 a year
- Full-time
- Hybrid work
- Mentoring
- Agile
- AI
- Employee assistance programme
Technology Operations Manager
Mr Lender —Loughton
- Full-time
- Azure
- Bachelor's degree
- SharePoint
- Free parking
- Health & wellbeing programme
Quick apply
8d
Senior System Requirements Engineer
Raytheon —Harlow
- Full-time
- Hybrid work
- Sick pay
Senior Credit Collections Specialist
Shure —Waltham Abbey
- £46,200 - £74,000 a year
- Full-time
- Hybrid work
- Accounting
- Communication skills
6d
Senior Quality Engineer
Steris —Bishop's Stortford
- Full-time
- Bachelor's degree
- Continuous improvement
- Team management
Quick apply
IT Support Engineer (1st to 2nd Line Progression)
3Gi Technology Ltd —Brentwood
- £28,000 - £32,000 a year
- Full-time
- In-person
- Communication skills
- Free parking
- Sick pay
Quick apply
Manager, Forward Deployed Engineering
Anthropic —London
- £255,000 - £325,000 a year
- Hybrid work
- Bachelor's degree
- Communication skills
- Flexible schedule
14d
Senior Process Engineer
Addison —Harlow
- Engineering
Senior Technical Support Engineer
YugabyteDB —London
- Remote
- Linux
End User Support Engineer (L2/L3)
Nimbus —London
- £45,000 - £50,000 a year
- Full-time
- Google Suite
- Maintenance
- Continuous improvement
- Health & wellbeing programme
- Life insurance
Quick apply
14d
Quality Engineer - DMSG (Full Time)
DM Systems Group Ltd —Letchworth
- Up to £38,000 a year
- Full-time
- Engineering
- Continuous improvement
- Quality control
- Free parking
Quick apply
Delivery Manager -UK - Permanent
Satalia —London
- Remote
- PMP
- Continuous improvement
- AI
- Flexible schedule
8d
Junior Algorithmic Shift Power Trader
Quark —London
- £45,000 - £50,000 a year
- Weekend availability
- Engineering
- Data analysis skills
- Analysis skills
Quick apply
Senior Fullstack Product Engineer
Foundation Partners —London
- £120,000 - £150,000 a year
- Hybrid work
- AI
Quick apply
Graduate AI Engineer
Fifty One Degrees —London
- £40,000 a year
- Full-time
- Hybrid work
- Software development
- AI
- Python
Quick apply
Software Engineer - Frontend
kraken —Cyprus Station
- Full-time
- English
- Communication skills
Senior Product Engineer (TS/NodeJS/Vue)
n8n —London
- £72,800 - £190,000 a year
- Full-time
- Remote
- Life insurance
Senior Software Engineer, Fullstack (International)
Affirm —London
- £120,000 - £168,000 a year
- Remote
- Team management
- AI
- Communication skills
- Employee stock purchase plan
Mid-level to Senior Software Engineer
Plasma —London
- £150,000 - £200,000 a year
- Full-time
- Bar
- Mentoring
2d

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Senior Software Engineer

Relay Technologies -
London

Apply Now

Job details

Full-time

Benefits

Discounted gym membership

Qualifications

Rust (programming language)
Law
Google Cloud Platform
Flutter
Machine learning
Distributed systems
TypeScript

Full job description

Relay is fundamentally reshaping how goods move in an online era. Backed by Europe’s largest-ever logistics Series A ($35M), led by deep-tech investors Plural (whose portfolio spans fusion energy and space exploration), Relay is scaling faster than 99.98% of venture-backed startups. We're assembling the most talent-dense team the logistics industry has ever seen

Relay’s Mission is to free commerce from friction. Today, high delivery costs act as a hidden tax on e-commerce, quietly shaping what can be sold online and limiting who can participate. We envision a world where more goods move more freely between more people, making the online shopping experience seamless and accessible to everyone.

THE TEAM

~110 people, more than half in engineering, product and data
45+ advanced degrees across computer science, mathematics and operations research
Thousands of data points captured, calculated, analysed and predicted for every single parcel we handle
An intellectually vibrant culture of first‑principles thinking, tight feedback loops and relentless experimentation

Work Alongside Industry Leaders

Diego Protas – Director of Engineering

Diego, an expert in distributed systems and hardware architecture, merging physical computing with enterprise-scale infrastructure. Previously directing teams of 170+ engineers at Mercado Libre and orchestrating large-scale ML-based inference at Meta. At Relay, Diego’s infectious enthusiasm and hands-on leadership are redefining the boundaries of speed and reliability.

Tech Stack Highlights

Python, Rust and TypeScript - we keep things simple but use the right tool for the job
Cross-platform Flutter apps with a deep focus on user experience
Cloud-native on GCP with extensive use of BigQuery and Cloud Run
Extensive use of ML modelling and LLM inference - no gimmicks here, this is our daily routine
Emerging tech integrations, including robotics and IoT-powered operations

The Opportunity

As a Software Engineer at Relay, you'll:

Own challenging, impactful problems end-to-end, from routing algorithms to real-time optimisation services and intuitive operational tools.
Collaborate closely with top engineers, data scientists, and product leaders in a highly autonomous and impact-driven environment.
Regularly ship production-quality code weekly—and often daily—seeing your work directly impact Relay’s growth.
Create incredible product experiences powering the fastest-growing e-commerce platforms, including Vinted, TikTok, and Temu, impacting millions of users worldwide.

Fast and Focused Hiring Process

Talent Acquisition Interview - 30 min
API Integration Interview - 1 hour
Technical Interview - 2 hours
Operating Principles & Impact - 1 hour
Decision and offer within 48 hours; our process mirrors our pace of work, typically completed in a week.

Compensation, Benefits & Workplace

Generous equity, richer than 99% of European startups, with annual top-ups to share Relay’s success.
Private health & dental coverage, so comprehensive you’d need to be a partner at a Magic Circle law firm to match it.
25 days of holidays
Enhanced parental leave.
Located in Shoreditch, our office set-up enables the kind of in-person interactions that drive impact. We work 4 days on-site, with 1 day remote.
Hardware of your choice.
Extensive perks (gym subsidies, cycle-to-work, Friday office lunch, covered Uber home and dinner for late nights, and more).

Who Thrives at Relay?

Aim with Precision: You define problems clearly and measure your impact meticulously.
Play to Win: You chase bold bets, tackle the hard stuff, and view constraints as fuel, not friction.
1% Better Every Day: You believe that small, consistent improvements lead to exponential growth. You move quickly, deliver results, and learn from every experience.
All In, All the Time: You show up and step up. You take ownership from start to finish and do what it takes to deliver when it counts.
People-Powered Greatness: You invest in your teammates. You give and receive feedback with care and candour. You build trust through high standards and shared success.
Grow the Whole Pie: You seek out win-win solutions for merchants, couriers, and our customers, because when they thrive, so do we.

If these resonate, and you combine strong technical fundamentals with entrepreneurial drive, let’s connect.

Relay is an equal-opportunity employer committed to diversity, inclusion, and fostering a workplace where everyone thrives.

Apply Now

Refine Your Search

senior system engineer jobs in harlow, ess

Senior Software Engineer

Chief Technology Officer

Technology Operations Manager

Senior System Requirements Engineer

Senior Credit Collections Specialist

Senior Quality Engineer

IT Support Engineer (1st to 2nd Line Progression)

Manager, Forward Deployed Engineering

Senior Process Engineer

Senior Technical Support Engineer

End User Support Engineer (L2/L3)

Quality Engineer - DMSG (Full Time)

Delivery Manager -UK - Permanent

Junior Algorithmic Shift Power Trader

Senior Fullstack Product Engineer

Graduate AI Engineer

Software Engineer - Frontend

Senior Product Engineer (TS/NodeJS/Vue)

Senior Software Engineer, Fullstack (International)

Mid-level to Senior Software Engineer

I want to receive the latest job alerts for senior system engineer in harlow, ess

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