Lead / Principal Engineer - Full Stack

Sahajsoftware; Greater London; Presencial; GBP 110.000 - 160.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Unlimited leaves

Life insurance

Private health insurance

No hierarchy

Open Salaries

Descripción de la vacante

Sahaj is looking for a Principal Consultant in London to help clients frame business problems and shape technical delivery. You’ll work in self-managing, high-impact teams, staying hands-on while guiding architecture, design, and delivery across distributed systems.

You’ll mentor practitioners, influence customer decisions, and drive organisational outcomes. You’ll thrive if you balance pragmatic delivery with engineering excellence, maintain calm under ambiguity, and communicate effectively

Formación

• Demonstrable building software systems in complex environments.
• Hands-on experience delivering distributed systems at scale.
• Strong engineering fundamentals; polyglot language skills.

Responsabilidades

• Frame problems with customers and propose solutions.
• Lead through technical excellence in design and delivery.
• Advise and align with stakeholders across teams.
• Communicate complex ideas clearly to technical and non-technical audiences.

Conocimientos

Distributed systems

Architecture design

Customer engagement

Polyglot programming

Descripción del empleo

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.

What will you experience in terms of culture at Sahaj?

• A culture of trust, respect and transparency
• Opportunity to collaborate with some of the finest minds in the industry
• Work across multiple domains

What are the benefits of being at Sahaj?

• Unlimited leaves
• Life insurance & private health insurance
• No hierarchy
• Open Salaries