Senior Backend Engineer - Profitable SaaS | TypeScript, NodeJS, AWS

JR United Kingdom; City Of London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A leading company in the SaaS space is looking for a Senior Backend Engineer to join their growing team in the City of London. This role offers real ownership of a core product used by over 500 restaurants, promising significant equity and career advancement. Candidates should be proficient in TypeScript and NodeJS, with strong experience in AWS and PostgreSQL, and a desire to work on innovative solutions for the food business sector.

Benefits

1-on-1 with founder

33 days holiday

Visa sponsorship available

Fortnightly team dinners

Qualifications

• Proficient in TypeScript and NodeJS.
• Strong experience with containerised and serverless infrastructure.
• Experience with GraphQL APIs and performance optimisation.

Responsibilities

• Take ownership and work with the founder on complex data challenges.
• Improve the core product as the company scales.
• Work in small teams and problem-solve end to end.

Skills

TypeScript

NodeJS

GraphQL

AWS

PostgreSQL

AI technologies

Containerised infrastructure

Performance tuning

Job description

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Senior Backend Engineer - Profitable SaaS | TypeScript, NodeJS, AWS, london (city of london)

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Client:

Jelly

Location:

london (city of london), United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Views:

4

Posted:

16.06.2025

Expiry Date:

31.07.2025

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Job Description:

Profitable VC‑backed SMB SaaS | 1–3 % equity | UK visa sponsor | Build core product used by 500+ restaurants

About Jelly

Jelly is rebuilding the operating system for food businesses from the ground up. Kitchens in Michelin stars, pubs, cafes and hotels still run core ops on pen & paper; we give them a modern operating system. 500 + sites use Jelly today and we’re profitable.

Why Now

Jelly’s profitable and demand is outpacing what we can ship. We’re investing in stronger foundations to unlock more velocity, but we’re stretched. This is the moment for you to help us move faster, raise the bar, and shape how we build as we grow.

The Mission

Take real ownership, work with the founder and engineering team to tackle complex data challenges at the heart of our product, improving the product and the codebase as we scale.

You’ll Work With

You might be a fit if

* You’ve shipped real things and dealt with their consequences

* You’ve worked in small teams and like solving problems end to end

* You know when to refactor and when to move on

* You care about users and outcomes more than abstractions

* You want to grow with a company, not just do a tour of duty

What You’ll Get

* Real ownership from day one

* £70–90k depending on experience

* Significant equity (1–3 %) and long‑term career upside

* A culture that values engineers, with protected time for cleanup and craft

* 1-on-1 with founder; access to roadmaps

* 33 days holiday, Hybrid London (Bank), Visa sponsorship available

* Fortnightly team dinners at customer restaurants

* Proficient in TypeScript and NodeJS

* Strong experience with containerised and serverless infrastructure (e.g. ECS, Lambda)

* Confident working with GraphQL APIs, performance optimisation, and data design

* Expertise in relational databases, especially PostgreSQL, including performance tuning

* Exposure to or interest in AI technologies, including personal or side projects

* PostgreSQL features, triggers and stored procedures.

* Experience with strictly typed languages such as GoLang.

* Experience with AWS solutions and services including ECS, Lambda and RDS.

* Experience with NoSQL and big data.

* Experience with Nexus GraphQL.

* Implementing AI APIs in an ETL pipeline or similar workflows

Stage 1: Quick intro call with founder (15min)

Stage 2: Technical interview (2 hours) on a real problem

Stage 3: Conversation with team + founder (2hrs)

Apply here or DM me (JJ) on WhatsApp [phone] with a real data or system tradeoff you’ve made under pressure and what you’d do differently now.