Lead / Principal Engineer - Full Stack

Sahajsoftware · London · posted today ago

engineering devops mobile remote jobs in united kingdom

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About this role

A different kind of organisation

High trust, transparency, and autonomy
Small teams, high ownership, flat structures
Radical compensation transparency
Sense of ownership in collective success
Work with exceptional people who deeply care about their craft

The role

As a Principal Consultant, you're often the first person a customer meets to brainstorm a business problem. You should be at home debating distributed systems with engineers and framing decisions with leadership. You'll frame the problem with customers, shape the approach with the team, provide technical direction, and stay hands-on through delivery. You will work in self-managing, experienced, small, and high-impact teams, solving hard problems. This is a consulting & tech delivery role and while you will not have direct reports, you will regularly influence teams, mentor practitioners, manage stakeholders, and guide organisations through complex technology and business decisions.

What the work looks like

We can't promise which problem you'll pick up, but the menu right now looks something like this:

Redesign a ClickHouse schema so an ad buyer can query 85 billion rows in under two seconds, and discover that pre-exploding the rows 168x is actually the right answer.
Keep a vehicle telemetry platform moving billions of messages a day without the Kafka consumers falling over.
Build the engineering spine of a mobile wallet used by more than two billion people across four continents.
Ship the data product behind peer-review submissions for one of the world's largest scientific publishers.

The list changes every quarter. The pattern doesn't: data-heavy, distributed, and often sitting on top of something that already exists and isn't perfect.

What you'll do

Frame Problems & Propose Solutions

Help customers find the right problem before jumping to a solution.
Facilitate discovery sessions, architecture reviews, and technical workshops.
Translate business goals into a technology strategy and an execution plan.

Lead Through Technical Excellence

Stay hands-on; contribute directly to design, architecture, implementation, and review.
Make pragmatic calls balancing business needs, engineering quality, and delivery timelines.
Guide teams to build scalable, resilient, secure systems and the practices that keep them that way.

Influence, Advise, and align

Act as a trusted advisor on technology and investment decisions; assessments, due diligence, advisory.
Build trust and alignment across Sahaj and customer teams
Converge competing priorities into a path forward.
Communicate complex ideas clearly to technical and non-technical audiences.
Shape new work through discovery and proposals; mentor others and raise the bar as you go.

Operate Across Technology Domains

Distributed systems, data engineering, AI & agentic systems, DevOps/SRE. Depth in few areas; breadth across, and appreciation for trade-offs in context.

You'll thrive here if

You reach for the simplest solution that gets the job done and distrust accidental complexity.
You think in systems, not isolated parts.
You stay calm when the path is unclear and build clarity for those around you.
You move easily between the org-level picture and the technical detail.
You're curious by default and pick up new domains fast.
You'd rather be in the room with a customer solving a real problem.

What we're looking for

Demonstrable building software systems in complex environments.
Strong engineering fundamentals; expert in at least one language, ideally polyglot.
Hands-on experience designing and delivering distributed systems at scale.
Deep grasp of architecture, system design, and engineering trade-offs.
Direct experience working with customers and business stakeholders.