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Syntasso

Senior+ Software Engineer

London, UK
Software · Technology · Software Development
Syntasso's mission is to help Platform teams thrive. For that reason, we created Kratix, a framework for building composable internal developer platforms.
Active
a month ago
Responds to
100% of requests
Responds in
2 days
Requests
0 pending
Conversations
1 started

Skills & Experience

Job roles: DevOps Engineer, Back End, Cloud Engineer
Experience level: Senior, Lead
Tech stack/tooling used: Go, Kubernetes
Core skills considered: Go, Kubernetes, CI/CD, TDD, Start up experience

Logistics

Base salary: £75K - £100K
Employment type: Permanent
Remote working: On-site, Hybrid (up to 3 remote days p/w)
Visa sponsorship: Not available

Job Description

Unlock the Future of Platform Engineering with Us

Imagine helping thousands of engineers build and run platforms that deliver securely and quickly, helping their teams ship real value. At Syntasso, you’ll be part of a small, expert team driving a global shift in how platform engineering is done. Your ideas will directly influence Kratix, our open-source framework, and our commercial product, Syntasso Kratix Enterprise.

By joining us, you won’t just build technology, you'll help define the standards of a new discipline. You’ll grow your technical depth, collaborate with leaders in the community, and see your contributions adopted by teams across industries.

Our Mission at Syntasso

At Syntasso, we believe platform engineering should empower, not constrain. We started the company after seeing too many teams struggle to build internal platforms that developers actually enjoy using.

That’s why we created Kratix: an open-source framework that helps organisations design, deliver, and scale their platforms with confidence. One early adopter cut platform onboarding from weeks to hours using Kratix, freeing engineers to focus on innovation instead of infrastructure.

Building on that success, we launched Syntasso Kratix Enterprise to help large-scale teams extend Kratix’s power with enterprise-grade capabilities. Together, these tools are rapidly becoming the go-to choice for platform teams worldwide.

By joining Syntasso, you’ll help shape the future of platform engineering empowering developers everywhere to work more effectively and build better software, faster.

Why Joining Syntasso Matters for Your Career:

By joining us, you'll become a pivotal part of our innovative journey, shaping the future of Kratix, our platform-building framework. Your role will involve close collaboration with Syntasso customers, giving you invaluable insights into their experiences and ensuring seamless Kratix adoption. You'll also have the opportunity to make a lasting impact on the Platform Engineering community in your unique way—whether it's through insightful blogs, prestigious conference speaking engagements, or active engagement with fellow professionals.

About the role:

As a Senior Software Engineer at Syntasso, you’ll play a key role in designing, building, and evolving Kratix and Syntasso Kratix Enterprise.

You’ll collaborate closely with a small, expert engineering team. Your work will span product contribution, customer collaboration, and hands-on system design. You’ll help shape architecture and APIs, improve user experience, and scale Kratix for enterprise environments.

In practice, this means you’ll:

  • Design and implement features for Kratix and Kratix Enterprise, primarily in Golang and Kubernetes.

  • Collaborate on architectural decisions that balance innovation, reliability, and usability.

  • Engage directly with customers to understand their platform challenges and ensure SKE solves them.

  • Work across product and engineering to deliver software that drives real impact.

  • Continuously learn, experiment, and help define what great platform engineering looks like.

  • Provide hands-on support to SKE customers, from diagnosing technical issues to shaping solutions that improve their platform outcomes.

About you:
  • Most importantly, you have a growth mindset. You bring enthusiasm, empathy, and a genuine desire to learn. Qualities that make you a trusted teammate and an active contributor to a thriving engineering community.

  • You’ve built and supported complex software systems before, maybe as part of a startup where you wore many hats, or within a larger organisation where reliability and scale were critical. You enjoy the puzzle of connecting technologies and people, translating complexity into clarity.

  • You thrive in collaborative environments: pairing, sharing ideas, and learning from those around you. When faced with ambiguity, your curiosity takes over; you test, learn, and adapt quickly. You’re motivated by solving real customer problems, not just writing elegant code.

  • You’re comfortable navigating distributed systems and modern infrastructure whether that’s working with Kubernetes, cloud platforms, or the CNCF and HashiCorp ecosystems. You have proficiency in Golang and Kubernetes, and one or more languages such as Ruby, Rust, or Python, with a willingness to learn whatever new tools help get the job done. You care deeply about engineering excellence practicing Extreme Programming (XP) techniques such as pairing, TDD, and continuous integration to deliver reliable, maintainable software.

What It’s Like to Work at Syntasso:
  • Working at Syntasso means joining a close-knit, highly collaborative team that loves to learn together. We value curiosity, openness, and craftsmanship — and we give each other the space to explore new ideas while always keeping our users in mind.

  • You’ll find us pairing on problems, running regular learning sessions, and sharing ideas that often spark new improvements for Kratix or contributions back to the open-source ecosystem we care about so deeply.

  • You’ll also be learning from experienced leaders who’ve built and scaled successful platform engineering businesses before. Our leadership team — including the founders of Kratix, and former senior leaders from organisations such as VMware and Pivotal, are deeply involved in day-to-day engineering and community work. They’re hands-on mentors who believe in empowering every team member to make an impact.

  • We’re also human. We look out for one another, we respect each other’s time, and we believe balance and wellbeing are part of doing great work. Our 35-hour week and hybrid model mean you can collaborate closely while still having space for deep focus and life outside of work.

What’s on Offer:
  • Competitive salary (£80,000–£120,000), depending on experience, plus early-stage equity, so you share in our success as we grow.

  • Financial stability: We’re a well-funded startup with a secure multi-year runway for growth and innovation.

  • A balanced 35-hour week, giving you time to focus deeply, recharge properly, and work sustainably.

  • Hybrid collaboration: Work remotely most of the time, with regular visits to our London Bridge office in the Leathermarket for hands-on teamwork and community.

  • Research Fridays: Every other Friday is dedicated to learning, experimentation, and open exploration — time to make Syntasso stronger tomorrow than it is today.

  • Professional growth: Whether you’re speaking at conferences, contributing to open source, or writing technical blogs, we’ll support you to develop your profile and share your expertise.

  • Learn from the best: Work closely with some of the most respected voices in platform engineering — our founders and team members who regularly speak at events such as DevOpsDays, Kubernetes Community Days, and FastFlow Conf.

  • We believe in an environment where you can thrive — one that combines technical challenge, personal growth, and genuine respect for your time and energy.

Company Benefits

  • A balanced 35-hour week, giving you time to focus deeply, work sustainably and recharge properly.

  • Hybrid collaboration: We need you to be available to be in our office in London Bridge three days a week (Tuesday, Wednesday and Thursday). Currently though, you'll come in one every week or two for hands-on teamwork and collaboration.

  • Research Fridays: Every other Friday is dedicated to learning, experimentation, and open exploration — time to make Syntasso stronger tomorrow than it is today.

  • 25 days of annual leave, plus UK public holidays. Additionally, you'll earn one extra day of holiday for each year worked, up to a maximum of 30 days.

  • Private medical insurance

  • Cycle to work

  • Salary sacrifice childcare

  • All employees are eligible for our EMI-backed options scheme, with ranges benchmarked against industry standards and reviewed based on performance and impact.

Interview Process

We know interviews can feel daunting, so we’ve designed a process that’s thoughtful, inclusive, and transparent — giving you the space to show your strengths and learn more about us along the way.

  1. Introduction conversation:You’ll start with an informal chat with our Co-Founder and VP of Engineering. This is a chance for us to learn more about your background and for you to ask questions about Syntasso and the role.

  2. CV deep dive:Next, you’ll meet one of our Engineering Managers for a deeper discussion about your most recent experience. We want to understand the kinds of challenges you’ve tackled, how you’ve approached problem-solving, and what kind of work energises you most.

  3. Remote pairing session:You’ll then complete a short, realistic coding task that reflects the kind of problems we solve every day. We’re interested in your thinking and approach, not perfection.

  4. In-person session:You’ll join us in our London office for architecture discussions and pairing exercises with members of the Kratix team. It’s collaborative, not competitive — we want you to experience what it’s like to work with us.

  5. Final conversation:You’ll wrap up with one of our founders for a cultural and values-focused discussion. This is as much about fit and shared purpose as it is about experience.

Our aim is to make every stage respectful, engaging, and meaningful — ensuring you leave each conversation with a clear sense of who we are and how we work.

Diversity, Equity&Inclusion

At Syntasso, we believe that diverse and inclusive teams build better products, foster stronger communities, and create happier workplaces. We’re committed to creating an environment where everyone feels respected, supported, and empowered to thrive.

We welcome people from all backgrounds, identities, and experiences. We also know that some people hesitate to apply unless they meet every single requirement. If you’re excited about what we’re building but aren’t sure you tick every box — please apply. We’d love to hear from you.


Skills of candidates in conversation

Go
Python
Kubernetes
AWS
Terraform
C
Co Founder
Active a month ago
Syntasso are no longer hiring for this position.

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Starling Bank on cord

Starling Bank

Full Stack Engineer (ML Ops)

London, UK
FinTech · Banking · Finance
A better bank for everyone
Active
over 6 months ago
Responds to
0% of requests
Responds in
1h 55m
Requests
7 pending

Skills & Experience

Job roles: Full Stack
Experience level: Mid, Senior
Core skills considered: Java, React, Redux, AWS, JavaScript

Logistics

Base salary: £70K - £110K
Employment type: Permanent
Remote working: Hybrid (up to 2 remote days p/w)
Visa sponsorship: Not available

Job Description

Starling is the UK’s first and leading digital bank on a mission to fix banking! Our vision is fast technology, fair service, and honest values. All at the tap of a phone, all the time.

Starling is the UK’s first and leading digital bank on a mission to fix banking! We built a new kind of bank because we knew technology had the power to help people save, spend and manage their money in a new and transformative way.

We’re a fully licensed UK bank with the culture and spirit of a fast-moving, disruptive tech company. We’re a bank, but better: fairer, easier to use and designed to demystify money for everyone. We employ more than 3,000 people across our London, Southampton, Cardiff and Manchester offices.

Our technologists are at the very heart of Starling and enjoy working in a fast-paced environment that is all about building things, creating new stuff, and disruptive technology that keeps us on the cutting edge of fintech. We operate a flat structure to empower you to make decisions regardless of what your primary responsibilities may be, innovation and collaboration will be at the core of everything you do. Help is never far away in our open culture, you will find support in your team and from across the business, we are in this together!

The way to thrive and shine within Starling is to be a self-driven individual and be able to take full ownership of everything around you: From building things, designing, discovering, to sharing knowledge with your colleagues and making sure all processes are efficient and productive to deliver the best possible results for our customers. Our purpose is underpinned by five Starling values: Listen, Keep It Simple, Do The Right Thing, Own It, and Aim For Greatness.

Hybrid Working

We have a Hybrid approach to working here at Starling - our preference is that you're located within a commutable distance of one of our offices so that we're able to interact and collaborate in person. We don't like to mandate how much you visit the office and work from home, that's to be agreed upon between you and your manager.

Our Data Environment

Our Data teams are excited about the value of data within the business, powers our product decisions to improve things for our customers and enhance effective and agile decision making, regardless of what their primary tech stack may be. Hear from the team in our latest blogs or our case studies with Women in Tech.

We are looking for talented data professionals at all levels to join the team. We value people being engaged and caring about customers, caring about the code they write and the contribution they make to Starling. People with a broad ability to apply themselves to a multitude of problems and challenges, who can work across teams do great things here at Starling, to continue changing banking for good.

Requirements

We have built our entire banking platform in house and mostly in Java. We are looking for people who want to work on building the tooling that is used by our engineers on a daily basis.

We are looking for people who are truly full stack, and are as comfortable polishing their javascript front end as they are debugging the innards of their java applications database interactions, or standing up infrastructure with terraform. We are looking for people who can:

  • Design REST apis.
  • Code backend services, ideally using Java, or another other server side compiled language.
  • Develop modern front ends, ideally using React and Redux.
  • Get their code into the cloud and support it there, ideally on AWS.
  • Believe in clean coding, simple solutions, automated testing and continuous deployment.
  • Like to take ownership of a feature from the original idea through to live.
  • Think (like us) that a small number of empowered developers is the right way to deliver software.

Company Benefits

  • 33 days holiday (including flexible bank holidays)
  • An extra day’s holiday for your birthday
  • 16 hours paid volunteering time a year
  • Part-time and/or flexible hours available for most roles
  • Salary sacrifice, company enhanced pension scheme
  • Life insurance at 4x your salary
  • Hybrid/remote working
  • Private Medical Insurance with VitalityHealth including mental health support and cancer care. Partner benefits include discounts with Waitrose, Mr&Mrs Smith and Peloton
  • Generous family-friendly policies
  • Varied social groups set up and run by our employees
  • Perkbox membership giving access to retail discounts, a wellness platform for physical and mental health, and weekly free and boosted perks
  • Access to initiatives like Cycle to Work, Salary Sacrificed Gym partnerships and Electric Vehicle (EV) leasing

Full details are available on our careers site

Interview Process

Interviewing is a two way process and we want you to have the time and opportunity to get to know us, as much as we are getting to know you! Our interviews are conversational and we want to get the best from you, so come with questions and be curious. In general you can expect the below, following a chat with one of our Talent Team:

  • Stage 1 - 30 mins with one of the team
  • Stage 2 - Take home challenge
  • Stage 3 - 90 mins technical interview with two team members
  • Stage 3 - 45 min final with an executive and a member of the people team
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