Let Go During Probation at Big Tech: Lessons from Being Dismissed After 3 Months

Background

This is the experience I least want to remember but most want to share. I was let go from a big tech company after just 3 months on the job.

Let me start with my background: 2.5 years of backend development experience, graduated from a mid-tier university, working as a Java developer at a small company. I got lucky during interviews and passed the technical rounds at a top-tier tech company. I was ecstatic — I thought I'd finally made it. Little did I know, the nightmare was just beginning.

The 3 months after joining were the darkest period of my career. From initial excitement to growing discomfort to ultimately being dismissed, the entire process taught me a hard truth: getting the offer is just the beginning — surviving is the real challenge.

Why I Was Let Go

Reason 1: Technical Skills Fell Short

This was the core reason. I passed the technical interview by grinding LeetCode and memorizing system design frameworks, but the skills needed in actual day-to-day work go far beyond that.

Problem 1: Code quality wasn't up to standard. Big tech has extremely high code quality requirements — every line goes through Code Review. My code was constantly sent back by reviewers for reasons including: inconsistent naming conventions, missing unit tests, unhandled edge cases, insufficient logging, and more. Once I submitted a PR that received 47 review comments. I wanted to crawl into a hole.

Problem 2: Insufficient system design skills. The complexity of big tech systems was far beyond what I'd imagined. The module I was responsible for involved distributed transactions, message queues, cache consistency — things I never had to think about at my small company. I frequently made design mistakes that required rework.

Problem 3: Unfamiliar tech stack. The team used a completely different stack from what I'd worked with — Go, Kubernetes, proprietary middleware. During the interview I said I was a "fast learner," but learning an entirely new stack from scratch under production pressure was overwhelming. Tasks that took others one day took me three.

Reason 2: Difficulty Integrating

Technical gaps can be learned, but integration problems are harder to solve.

Problem 1: Communication style mismatch. Big tech communication is completely different from small companies. At a startup you just shout across the room. At big tech, you write docs, send emails, schedule meetings, and give presentations. I wasn't used to this "communication-heavy" style and frequently ran into issues because of poor communication.

Problem 2: Team culture mismatch. My team had an intensely competitive culture where everyone was constantly trying to prove themselves. As a newcomer who didn't understand the team's history or unwritten rules, I kept stepping on landmines without realizing it. Once I made an "optimization suggestion" in the team chat and got pulled aside by my manager: "Focus on your own work first before worrying about others."

Problem 3: Psychological pressure. Every day felt like a battle — I was terrified of making mistakes. I'd go home and study new technologies in the evening, spend weekends catching up. The sustained high pressure destroyed my sleep quality, leaving me foggy during the day and even less productive — a vicious cycle.

Probation Period Evaluation Criteria

After being let go, I learned that big tech probation evaluations have clear criteria — it's not just the manager's whim. Generally, probation evaluations cover these dimensions:

1. Code quality and output: The most objective metric. Your code review pass rate, PR quantity and quality, number of production bugs. My code review pass rate was around 60%, far below the team average of 85%.

2. Task completion: Whether assigned tasks are completed on time and at the expected quality. During my probation, I had 3 late deliveries and 2 reworks due to quality issues.

3. Technical growth rate: Whether the new hire shows clear learning progress. Managers assess your growth curve during 1-on-1s. My growth clearly wasn't meeting expectations — after 3 months, I was still asking basic questions.

4. Team collaboration: Whether you integrate with the team and work smoothly with colleagues. This dimension is subjective but important. If colleagues generally report that "working with this person is exhausting," that's a red flag.

5. Self-direction: Whether you proactively learn, communicate, and take ownership. Big tech highly values self-direction — waiting to be taught doesn't work.

Typically, there's a mid-probation evaluation at the end of month 2 and a final evaluation at the end of month 3. If issues are identified at the mid-evaluation, the manager will discuss an improvement plan. If you still don't meet the bar at the final evaluation, the dismissal process begins.

How to Avoid Being Dismissed During Probation

After being let go, I reflected deeply and summarized these recommendations:

1. Don't oversell yourself in interviews. I told interviewers I "excelled" at things I merely "understood" and was "proficient" in things I'd only "used." This set unrealistically high expectations that my actual skills couldn't match. Being honest about your level and letting the company set reasonable expectations is far better than being exposed after joining.

2. Prepare technically before joining. If you know the tech stack you'll be using, study it in advance. I had a month between getting the offer and my start date, but I was so busy celebrating that I didn't prepare at all. If I'd spent that month learning Go and K8s, things might have been completely different.

3. Communicate proactively — don't suffer in silence. When you hit a problem, ask a colleague or your manager immediately instead of struggling alone. Big tech codebases are massive and complex — self-exploration is extremely inefficient. But there's an art to asking questions: try to solve it yourself first, organize your thoughts, then ask — don't just say "how do I do this?"

4. Take Code Review seriously. Code Review isn't about finding fault — it's about helping you improve. Treat every comment seriously, understand the reasoning behind it, don't just make the change and move on. I later realized those review comments were actually the best learning materials.

5. Build relationships. Find a mentor or onboarding buddy who's willing to help and build a good relationship with them. Chat with colleagues during breaks to understand team culture and unwritten rules. Don't just bury yourself in code — relationships are part of the job.

6. Manage expectations. Maintain regular communication with your manager about their expectations and assessment of you. The earlier you know if your manager has concerns, the more time you have to adjust. Don't wait until the final evaluation to discover you're not meeting the bar.

7. Take care of your mental health. Probation period stress is normal, but if it's affecting your sleep and physical health, seek help immediately. Talk to HR or the Employee Assistance Program (EAP) — don't carry it alone.

What to Do After Being Dismissed

The day I was let go, I was completely numb. My manager called me into a meeting room and said "Based on your probation evaluation, we don't believe you're a fit for this role." I just said "OK, I understand," went back to my desk, packed my things, and left.

In hindsight, I should have handled it better. Here's my advice:

1. Know your rights. In the US, most employment is "at-will," meaning either party can terminate the relationship at any time. However, if you have an employment contract (more common at senior levels), review the termination provisions carefully. You may be entitled to severance pay, COBRA health insurance continuation, and payment for unused PTO.

2. Get everything in writing. Don't accept a verbal dismissal. Request a written termination notice stating the reason and any severance package. This is critical documentation for any future claims.

3. Don't sign anything immediately. Some companies will pressure you to sign a separation agreement on the spot. Don't do it. Take the document home and review it carefully — or better yet, have an employment lawyer review it. These agreements often include waivers of your right to sue.

4. Preserve evidence. Save all work-related emails, Slack messages, performance reviews, and feedback. These are important evidence if you need to file a claim.

5. Give yourself time to recover. Being let go isn't the end of the world, but it does take time to process. It took me about two weeks to emerge from the shadow. Don't rush into the next job search — adjust your mindset first.

Impact on Future Job Searches

This is what most people worry about: Will being dismissed during probation affect future job searches?

Short-term impact: Definitely. A 3-month stint on your resume is awkward — including it invites questions, excluding it creates a gap. My approach: Don't volunteer this experience, but be honest if asked. During interviews, you can say "After the probation period, it became clear that the role wasn't the right fit, and we mutually agreed to part ways" — this sounds better than "I was fired."

Long-term impact: Almost none. As long as your subsequent work history is stable, nobody will care about a 3-month probation stint. I've been at my current company for 2 years now, and nobody has ever asked about that period.

Background check impact: Most background check companies only verify your last 1-2 positions. A 3-month probation stint not listed on your resume typically won't be discovered. But if you do list it, the background check may contact the previous company's HR to confirm the reason for departure.

Overall, being dismissed during probation isn't shameful and doesn't mean you're incompetent. It likely just means it wasn't a match — mismatched tech stack, team culture, or work pace. Finding the right environment for you is what matters most.

Key Takeaways

1. Getting the offer isn't the finish line — it's the starting line. Many people think they've succeeded once they get a big tech offer, but the real test is your performance after joining. Don't let your guard down.

2. Be authentic in interviews. Overselling only creates a bigger gap to bridge after joining. Let the company judge based on your real abilities — it's better for both sides.

3. Prepare before joining. Learn about the tech stack, team culture, and work pace in advance. Get mentally ready.

4. Seek help when you need it. Don't carry everything alone. Proactive communication is the fastest way to solve problems.

5. Being dismissed isn't shameful. A mismatch is a mismatch. Finding the right environment is what matters.

6. Know your legal rights. Even if dismissed during probation, you may be entitled to severance and benefits. Don't walk away empty-handed.

7. Failure is the best teacher. This experience helped me grow significantly and gave me clarity about my strengths and weaknesses.

FAQ

Q: Is there severance pay for probation dismissal?
A: In the US, at-will employment generally means no severance is required by law. However, many companies offer severance packages even during probation, especially if they initiate the termination. Review your offer letter and any employment agreement carefully. If the company has a severance policy, it typically applies regardless of probation status.

Q: Can I file a wrongful termination claim?
A: In at-will employment states, it's difficult but not impossible. If you believe the termination was based on discrimination (race, gender, age, disability, etc.), retaliation, or violated an employment contract, you may have a claim. Consult an employment lawyer for your specific situation.

Q: Should I include a 3-month probation stint on my resume?
A: Generally no. A 3-month stint doesn't add value to your resume and may raise questions. If there's a gap, you can explain it as "taking time to recharge" or "self-study and skill development."

Q: What's the typical probation dismissal rate at big tech?
A: It varies significantly by company. Generally, big tech probation dismissal rates range from 5%-15%. Some teams have higher rates, some almost never dismiss. You can ask about this indirectly during interviews.

Q: How can I tell if I'm at risk of being dismissed?
A: Watch for these signals: 1) Your manager frequently raises concerns in 1-on-1s; 2) Your tasks are becoming increasingly simple/marginal; 3) Mid-probation evaluation results are unfavorable; 4) Colleagues' attitudes toward you have noticeably cooled. If you notice these signs, proactively discuss an improvement plan with your manager.